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| author | Andrey Andreev <narf@devilix.net> | 2019-01-16 16:49:35 +0100 |
|---|---|---|
| committer | Andrey Andreev <narf@devilix.net> | 2019-01-16 16:49:35 +0100 |
| commit | c576995304fc3609cca0b7b92d1b2cd611ec82f5 (patch) | |
| tree | c8b9121cb295b56bbabe3aeaad0a3eb1f2d390bb /user_guide/database/query_builder.html | |
| parent | 4eaf80a6ec0b58a0adc95638153363e00ebf5378 (diff) | |
[ci skip] 3.1.10 release
Diffstat (limited to 'user_guide/database/query_builder.html')
| -rw-r--r-- | user_guide/database/query_builder.html | 2715 |
1 files changed, 2715 insertions, 0 deletions
diff --git a/user_guide/database/query_builder.html b/user_guide/database/query_builder.html new file mode 100644 index 000000000..75179128e --- /dev/null +++ b/user_guide/database/query_builder.html @@ -0,0 +1,2715 @@ + + +<!DOCTYPE html> +<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> +<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + + <title>Query Builder Class — CodeIgniter 3.1.10 documentation</title> + + + + + <link rel="shortcut icon" href="../_static/ci-icon.ico"/> + + + + <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'> + + + + + + + + + + <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> + + + + <link rel="index" title="Index" + href="../genindex.html"/> + <link 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style="float:right;margin-left:5px;" id="closeMe"> + <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> + </div> + </ul> + <hr/> +</div> + <div role="main" class="document"> + + <div class="section" id="query-builder-class"> +<h1>Query Builder Class<a class="headerlink" href="#query-builder-class" title="Permalink to this headline">¶</a></h1> +<p>CodeIgniter gives you access to a Query Builder class. This pattern +allows information to be retrieved, inserted, and updated in your +database with minimal scripting. In some cases only one or two lines +of code are necessary to perform a database action. +CodeIgniter does not require that each database table be its own class +file. It instead provides a more simplified interface.</p> +<p>Beyond simplicity, a major benefit to using the Query Builder features +is that it allows you to create database independent applications, since +the query syntax is generated by each database adapter. It also allows +for safer queries, since the values are escaped automatically by the +system.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">If you intend to write your own queries you can disable this +class in your database config file, allowing the core database library +and adapter to utilize fewer resources.</p> +</div> +<div class="contents local topic" id="contents"> +<ul class="simple"> +<li><a class="reference internal" href="#selecting-data" id="id1">Selecting Data</a></li> +<li><a class="reference internal" href="#looking-for-specific-data" id="id2">Looking for Specific Data</a></li> +<li><a class="reference internal" href="#looking-for-similar-data" id="id3">Looking for Similar Data</a></li> +<li><a class="reference internal" href="#ordering-results" id="id4">Ordering results</a></li> +<li><a class="reference internal" href="#limiting-or-counting-results" id="id5">Limiting or Counting Results</a></li> +<li><a class="reference internal" href="#query-grouping" id="id6">Query grouping</a></li> +<li><a class="reference internal" href="#inserting-data" id="id7">Inserting Data</a></li> +<li><a class="reference internal" href="#updating-data" id="id8">Updating Data</a></li> +<li><a class="reference internal" href="#deleting-data" id="id9">Deleting Data</a></li> +<li><a class="reference internal" href="#method-chaining" id="id10">Method Chaining</a></li> +<li><a class="reference internal" href="#query-builder-caching" id="id11">Query Builder Caching</a></li> +<li><a class="reference internal" href="#resetting-query-builder" id="id12">Resetting Query Builder</a></li> +<li><a class="reference internal" href="#class-reference" id="id13">Class Reference</a></li> +</ul> +</div> +<div class="section" id="selecting-data"> +<h2><a class="toc-backref" href="#id1">Selecting Data</a><a class="headerlink" href="#selecting-data" title="Permalink to this headline">¶</a></h2> +<p>The following functions allow you to build SQL <strong>SELECT</strong> statements.</p> +<p><strong>$this->db->get()</strong></p> +<p>Runs the selection query and returns the result. Can be used by itself +to retrieve all records from a table:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> <span class="c1">// Produces: SELECT * FROM mytable</span> +</pre></div> +</div> +<p>The second and third parameters enable you to set a limit and offset +clause:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">20</span><span class="p">);</span> + +<span class="c1">// Executes: SELECT * FROM mytable LIMIT 20, 10</span> +<span class="c1">// (in MySQL. Other databases have slightly different syntax)</span> +</pre></div> +</div> +<p>You’ll notice that the above function is assigned to a variable named +$query, which can be used to show the results:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> + +<span class="k">foreach</span> <span class="p">(</span><span class="nv">$query</span><span class="o">-></span><span class="na">result</span><span class="p">()</span> <span class="k">as</span> <span class="nv">$row</span><span class="p">)</span> +<span class="p">{</span> + <span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">title</span><span class="p">;</span> +<span class="p">}</span> +</pre></div> +</div> +<p>Please visit the <a class="reference internal" href="results.html"><span class="doc">result functions</span></a> page for a full +discussion regarding result generation.</p> +<p><strong>$this->db->get_compiled_select()</strong></p> +<p>Compiles the selection query just like <strong>$this->db->get()</strong> but does not <em>run</em> +the query. This method simply returns the SQL query as a string.</p> +<p>Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$sql</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get_compiled_select</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> +<span class="k">echo</span> <span class="nv">$sql</span><span class="p">;</span> + +<span class="c1">// Prints string: SELECT * FROM mytable</span> +</pre></div> +</div> +<p>The second parameter enables you to set whether or not the query builder query +will be reset (by default it will be reset, just like when using <cite>$this->db->get()</cite>):</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">limit</span><span class="p">(</span><span class="mi">10</span><span class="p">,</span><span class="mi">20</span><span class="p">)</span><span class="o">-></span><span class="na">get_compiled_select</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span> + +<span class="c1">// Prints string: SELECT * FROM mytable LIMIT 20, 10</span> +<span class="c1">// (in MySQL. Other databases have slightly different syntax)</span> + +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'title, content, date'</span><span class="p">)</span><span class="o">-></span><span class="na">get_compiled_select</span><span class="p">();</span> + +<span class="c1">// Prints string: SELECT title, content, date FROM mytable LIMIT 20, 10</span> +</pre></div> +</div> +<p>The key thing to notice in the above example is that the second query did not +utilize <strong>$this->db->from()</strong> and did not pass a table name into the first +parameter. The reason for this outcome is because the query has not been +executed using <strong>$this->db->get()</strong> which resets values or reset directly +using <strong>$this->db->reset_query()</strong>.</p> +<p><strong>$this->db->get_where()</strong></p> +<p>Identical to the above function except that it permits you to add a +“where” clause in the second parameter, instead of using the db->where() +function:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get_where</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">'id'</span> <span class="o">=></span> <span class="nv">$id</span><span class="p">),</span> <span class="nv">$limit</span><span class="p">,</span> <span class="nv">$offset</span><span class="p">);</span> +</pre></div> +</div> +<p>Please read the about the where function below for more information.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">get_where() was formerly known as getwhere(), which has been removed</p> +</div> +<p><strong>$this->db->select()</strong></p> +<p>Permits you to write the SELECT portion of your query:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'title, content, date'</span><span class="p">);</span> +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> + +<span class="c1">// Executes: SELECT title, content, date FROM mytable</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">If you are selecting all (*) from a table you do not need to +use this function. When omitted, CodeIgniter assumes that you wish +to select all fields and automatically adds ‘SELECT *’.</p> +</div> +<p><code class="docutils literal"><span class="pre">$this->db->select()</span></code> accepts an optional second parameter. If you set it +to FALSE, CodeIgniter will not try to protect your field or table names. +This is useful if you need a compound select statement where automatic +escaping of fields may break them.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'(SELECT SUM(payments.amount) FROM payments WHERE payments.invoice_id=4) AS amount_paid'</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span> +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> +</pre></div> +</div> +<p><strong>$this->db->select_max()</strong></p> +<p>Writes a <code class="docutils literal"><span class="pre">SELECT</span> <span class="pre">MAX(field)</span></code> portion for your query. You can optionally +include a second parameter to rename the resulting field.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select_max</span><span class="p">(</span><span class="s1">'age'</span><span class="p">);</span> +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'members'</span><span class="p">);</span> <span class="c1">// Produces: SELECT MAX(age) as age FROM members</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select_max</span><span class="p">(</span><span class="s1">'age'</span><span class="p">,</span> <span class="s1">'member_age'</span><span class="p">);</span> +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'members'</span><span class="p">);</span> <span class="c1">// Produces: SELECT MAX(age) as member_age FROM members</span> +</pre></div> +</div> +<p><strong>$this->db->select_min()</strong></p> +<p>Writes a “SELECT MIN(field)” portion for your query. As with +select_max(), You can optionally include a second parameter to rename +the resulting field.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select_min</span><span class="p">(</span><span class="s1">'age'</span><span class="p">);</span> +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'members'</span><span class="p">);</span> <span class="c1">// Produces: SELECT MIN(age) as age FROM members</span> +</pre></div> +</div> +<p><strong>$this->db->select_avg()</strong></p> +<p>Writes a “SELECT AVG(field)” portion for your query. As with +select_max(), You can optionally include a second parameter to rename +the resulting field.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select_avg</span><span class="p">(</span><span class="s1">'age'</span><span class="p">);</span> +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'members'</span><span class="p">);</span> <span class="c1">// Produces: SELECT AVG(age) as age FROM members</span> +</pre></div> +</div> +<p><strong>$this->db->select_sum()</strong></p> +<p>Writes a “SELECT SUM(field)” portion for your query. As with +select_max(), You can optionally include a second parameter to rename +the resulting field.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select_sum</span><span class="p">(</span><span class="s1">'age'</span><span class="p">);</span> +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'members'</span><span class="p">);</span> <span class="c1">// Produces: SELECT SUM(age) as age FROM members</span> +</pre></div> +</div> +<p><strong>$this->db->from()</strong></p> +<p>Permits you to write the FROM portion of your query:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'title, content, date'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">from</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">();</span> <span class="c1">// Produces: SELECT title, content, date FROM mytable</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">As shown earlier, the FROM portion of your query can be specified +in the $this->db->get() function, so use whichever method you prefer.</p> +</div> +<p><strong>$this->db->join()</strong></p> +<p>Permits you to write the JOIN portion of your query:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'*'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">from</span><span class="p">(</span><span class="s1">'blogs'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">join</span><span class="p">(</span><span class="s1">'comments'</span><span class="p">,</span> <span class="s1">'comments.id = blogs.id'</span><span class="p">);</span> +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">();</span> + +<span class="c1">// Produces:</span> +<span class="c1">// SELECT * FROM blogs JOIN comments ON comments.id = blogs.id</span> +</pre></div> +</div> +<p>Multiple function calls can be made if you need several joins in one +query.</p> +<p>If you need a specific type of JOIN you can specify it via the third +parameter of the function. Options are: left, right, outer, inner, left +outer, and right outer.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">join</span><span class="p">(</span><span class="s1">'comments'</span><span class="p">,</span> <span class="s1">'comments.id = blogs.id'</span><span class="p">,</span> <span class="s1">'left'</span><span class="p">);</span> +<span class="c1">// Produces: LEFT JOIN comments ON comments.id = blogs.id</span> +</pre></div> +</div> +</div> +<div class="section" id="looking-for-specific-data"> +<h2><a class="toc-backref" href="#id2">Looking for Specific Data</a><a class="headerlink" href="#looking-for-specific-data" title="Permalink to this headline">¶</a></h2> +<p><strong>$this->db->where()</strong></p> +<p>This function enables you to set <strong>WHERE</strong> clauses using one of four +methods:</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">All values passed to this function are escaped automatically, +producing safer queries.</p> +</div> +<ol class="arabic"> +<li><p class="first"><strong>Simple key/value method:</strong></p> +<blockquote> +<div><div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'name'</span><span class="p">,</span> <span class="nv">$name</span><span class="p">);</span> <span class="c1">// Produces: WHERE name = 'Joe'</span> +</pre></div> +</div> +<p>Notice that the equal sign is added for you.</p> +<p>If you use multiple function calls they will be chained together with +AND between them:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'name'</span><span class="p">,</span> <span class="nv">$name</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="nv">$title</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'status'</span><span class="p">,</span> <span class="nv">$status</span><span class="p">);</span> +<span class="c1">// WHERE name = 'Joe' AND title = 'boss' AND status = 'active'</span> +</pre></div> +</div> +</div></blockquote> +</li> +<li><p class="first"><strong>Custom key/value method:</strong></p> +<blockquote> +<div><p>You can include an operator in the first parameter in order to +control the comparison:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'name !='</span><span class="p">,</span> <span class="nv">$name</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'id <'</span><span class="p">,</span> <span class="nv">$id</span><span class="p">);</span> <span class="c1">// Produces: WHERE name != 'Joe' AND id < 45</span> +</pre></div> +</div> +</div></blockquote> +</li> +<li><p class="first"><strong>Associative array method:</strong></p> +<blockquote> +<div><div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$array</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span> <span class="s1">'title'</span> <span class="o">=></span> <span class="nv">$title</span><span class="p">,</span> <span class="s1">'status'</span> <span class="o">=></span> <span class="nv">$status</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="nv">$array</span><span class="p">);</span> +<span class="c1">// Produces: WHERE name = 'Joe' AND title = 'boss' AND status = 'active'</span> +</pre></div> +</div> +<p>You can include your own operators using this method as well:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$array</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'name !='</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span> <span class="s1">'id <'</span> <span class="o">=></span> <span class="nv">$id</span><span class="p">,</span> <span class="s1">'date >'</span> <span class="o">=></span> <span class="nv">$date</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="nv">$array</span><span class="p">);</span> +</pre></div> +</div> +</div></blockquote> +</li> +<li><dl class="first docutils"> +<dt><strong>Custom string:</strong></dt> +<dd><p class="first">You can write your own clauses manually:</p> +<div class="last highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$where</span> <span class="o">=</span> <span class="s2">"name='Joe' AND status='boss' OR status='active'"</span><span class="p">;</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="nv">$where</span><span class="p">);</span> +</pre></div> +</div> +</dd> +</dl> +</li> +</ol> +<p><code class="docutils literal"><span class="pre">$this->db->where()</span></code> accepts an optional third parameter. If you set it to +FALSE, CodeIgniter will not try to protect your field or table names.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'MATCH (field) AGAINST ("value")'</span><span class="p">,</span> <span class="k">NULL</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span> +</pre></div> +</div> +<p><strong>$this->db->or_where()</strong></p> +<p>This function is identical to the one above, except that multiple +instances are joined by OR:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'name !='</span><span class="p">,</span> <span class="nv">$name</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">or_where</span><span class="p">(</span><span class="s1">'id >'</span><span class="p">,</span> <span class="nv">$id</span><span class="p">);</span> <span class="c1">// Produces: WHERE name != 'Joe' OR id > 50</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">or_where() was formerly known as orwhere(), which has been +removed.</p> +</div> +<p><strong>$this->db->where_in()</strong></p> +<p>Generates a WHERE field IN (‘item’, ‘item’) SQL query joined with AND if +appropriate</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$names</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'Frank'</span><span class="p">,</span> <span class="s1">'Todd'</span><span class="p">,</span> <span class="s1">'James'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where_in</span><span class="p">(</span><span class="s1">'username'</span><span class="p">,</span> <span class="nv">$names</span><span class="p">);</span> +<span class="c1">// Produces: WHERE username IN ('Frank', 'Todd', 'James')</span> +</pre></div> +</div> +<p><strong>$this->db->or_where_in()</strong></p> +<p>Generates a WHERE field IN (‘item’, ‘item’) SQL query joined with OR if +appropriate</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$names</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'Frank'</span><span class="p">,</span> <span class="s1">'Todd'</span><span class="p">,</span> <span class="s1">'James'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">or_where_in</span><span class="p">(</span><span class="s1">'username'</span><span class="p">,</span> <span class="nv">$names</span><span class="p">);</span> +<span class="c1">// Produces: OR username IN ('Frank', 'Todd', 'James')</span> +</pre></div> +</div> +<p><strong>$this->db->where_not_in()</strong></p> +<p>Generates a WHERE field NOT IN (‘item’, ‘item’) SQL query joined with +AND if appropriate</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$names</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'Frank'</span><span class="p">,</span> <span class="s1">'Todd'</span><span class="p">,</span> <span class="s1">'James'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where_not_in</span><span class="p">(</span><span class="s1">'username'</span><span class="p">,</span> <span class="nv">$names</span><span class="p">);</span> +<span class="c1">// Produces: WHERE username NOT IN ('Frank', 'Todd', 'James')</span> +</pre></div> +</div> +<p><strong>$this->db->or_where_not_in()</strong></p> +<p>Generates a WHERE field NOT IN (‘item’, ‘item’) SQL query joined with OR +if appropriate</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$names</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'Frank'</span><span class="p">,</span> <span class="s1">'Todd'</span><span class="p">,</span> <span class="s1">'James'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">or_where_not_in</span><span class="p">(</span><span class="s1">'username'</span><span class="p">,</span> <span class="nv">$names</span><span class="p">);</span> +<span class="c1">// Produces: OR username NOT IN ('Frank', 'Todd', 'James')</span> +</pre></div> +</div> +</div> +<div class="section" id="looking-for-similar-data"> +<h2><a class="toc-backref" href="#id3">Looking for Similar Data</a><a class="headerlink" href="#looking-for-similar-data" title="Permalink to this headline">¶</a></h2> +<p><strong>$this->db->like()</strong></p> +<p>This method enables you to generate <strong>LIKE</strong> clauses, useful for doing +searches.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">All values passed to this method are escaped automatically.</p> +</div> +<ol class="arabic"> +<li><p class="first"><strong>Simple key/value method:</strong></p> +<blockquote> +<div><div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">);</span> +<span class="c1">// Produces: WHERE `title` LIKE '%match%' ESCAPE '!'</span> +</pre></div> +</div> +<p>If you use multiple method calls they will be chained together with +AND between them:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'body'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">);</span> +<span class="c1">// WHERE `title` LIKE '%match%' ESCAPE '!' AND `body` LIKE '%match% ESCAPE '!'</span> +</pre></div> +</div> +<p>If you want to control where the wildcard (%) is placed, you can use +an optional third argument. Your options are ‘before’, ‘after’, ‘none’ and +‘both’ (which is the default).</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">,</span> <span class="s1">'before'</span><span class="p">);</span> <span class="c1">// Produces: WHERE `title` LIKE '%match' ESCAPE '!'</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">,</span> <span class="s1">'after'</span><span class="p">);</span> <span class="c1">// Produces: WHERE `title` LIKE 'match%' ESCAPE '!'</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">,</span> <span class="s1">'none'</span><span class="p">);</span> <span class="c1">// Produces: WHERE `title` LIKE 'match' ESCAPE '!'</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">,</span> <span class="s1">'both'</span><span class="p">);</span> <span class="c1">// Produces: WHERE `title` LIKE '%match%' ESCAPE '!'</span> +</pre></div> +</div> +</div></blockquote> +</li> +<li><p class="first"><strong>Associative array method:</strong></p> +<blockquote> +<div><div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$array</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="nv">$match</span><span class="p">,</span> <span class="s1">'page1'</span> <span class="o">=></span> <span class="nv">$match</span><span class="p">,</span> <span class="s1">'page2'</span> <span class="o">=></span> <span class="nv">$match</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="nv">$array</span><span class="p">);</span> +<span class="c1">// WHERE `title` LIKE '%match%' ESCAPE '!' AND `page1` LIKE '%match%' ESCAPE '!' AND `page2` LIKE '%match%' ESCAPE '!'</span> +</pre></div> +</div> +</div></blockquote> +</li> +</ol> +<p><strong>$this->db->or_like()</strong></p> +<p>This method is identical to the one above, except that multiple +instances are joined by OR:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">);</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">or_like</span><span class="p">(</span><span class="s1">'body'</span><span class="p">,</span> <span class="nv">$match</span><span class="p">);</span> +<span class="c1">// WHERE `title` LIKE '%match%' ESCAPE '!' OR `body` LIKE '%match%' ESCAPE '!'</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last"><code class="docutils literal"><span class="pre">or_like()</span></code> was formerly known as <code class="docutils literal"><span class="pre">orlike()</span></code>, which has been removed.</p> +</div> +<p><strong>$this->db->not_like()</strong></p> +<p>This method is identical to <code class="docutils literal"><span class="pre">like()</span></code>, except that it generates +NOT LIKE statements:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">not_like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">);</span> <span class="c1">// WHERE `title` NOT LIKE '%match% ESCAPE '!'</span> +</pre></div> +</div> +<p><strong>$this->db->or_not_like()</strong></p> +<p>This method is identical to <code class="docutils literal"><span class="pre">not_like()</span></code>, except that multiple +instances are joined by OR:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">or_not_like</span><span class="p">(</span><span class="s1">'body'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">);</span> +<span class="c1">// WHERE `title` LIKE '%match% OR `body` NOT LIKE '%match%' ESCAPE '!'</span> +</pre></div> +</div> +<p><strong>$this->db->group_by()</strong></p> +<p>Permits you to write the GROUP BY portion of your query:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">group_by</span><span class="p">(</span><span class="s2">"title"</span><span class="p">);</span> <span class="c1">// Produces: GROUP BY title</span> +</pre></div> +</div> +<p>You can also pass an array of multiple values as well:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">group_by</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s2">"title"</span><span class="p">,</span> <span class="s2">"date"</span><span class="p">));</span> <span class="c1">// Produces: GROUP BY title, date</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">group_by() was formerly known as groupby(), which has been +removed.</p> +</div> +<p><strong>$this->db->distinct()</strong></p> +<p>Adds the “DISTINCT” keyword to a query</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">distinct</span><span class="p">();</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'table'</span><span class="p">);</span> <span class="c1">// Produces: SELECT DISTINCT * FROM table</span> +</pre></div> +</div> +<p><strong>$this->db->having()</strong></p> +<p>Permits you to write the HAVING portion of your query. There are 2 +possible syntaxes, 1 argument or 2:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">having</span><span class="p">(</span><span class="s1">'user_id = 45'</span><span class="p">);</span> <span class="c1">// Produces: HAVING user_id = 45</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">having</span><span class="p">(</span><span class="s1">'user_id'</span><span class="p">,</span> <span class="mi">45</span><span class="p">);</span> <span class="c1">// Produces: HAVING user_id = 45</span> +</pre></div> +</div> +<p>You can also pass an array of multiple values as well:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">having</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'title ='</span> <span class="o">=></span> <span class="s1">'My Title'</span><span class="p">,</span> <span class="s1">'id <'</span> <span class="o">=></span> <span class="nv">$id</span><span class="p">));</span> +<span class="c1">// Produces: HAVING title = 'My Title', id < 45</span> +</pre></div> +</div> +<p>If you are using a database that CodeIgniter escapes queries for, you +can prevent escaping content by passing an optional third argument, and +setting it to FALSE.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">having</span><span class="p">(</span><span class="s1">'user_id'</span><span class="p">,</span> <span class="mi">45</span><span class="p">);</span> <span class="c1">// Produces: HAVING `user_id` = 45 in some databases such as MySQL</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">having</span><span class="p">(</span><span class="s1">'user_id'</span><span class="p">,</span> <span class="mi">45</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span> <span class="c1">// Produces: HAVING user_id = 45</span> +</pre></div> +</div> +<p><strong>$this->db->or_having()</strong></p> +<p>Identical to having(), only separates multiple clauses with “OR”.</p> +</div> +<div class="section" id="ordering-results"> +<h2><a class="toc-backref" href="#id4">Ordering results</a><a class="headerlink" href="#ordering-results" title="Permalink to this headline">¶</a></h2> +<p><strong>$this->db->order_by()</strong></p> +<p>Lets you set an ORDER BY clause.</p> +<p>The first parameter contains the name of the column you would like to order by.</p> +<p>The second parameter lets you set the direction of the result. +Options are <strong>ASC</strong>, <strong>DESC</strong> AND <strong>RANDOM</strong>.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">order_by</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'DESC'</span><span class="p">);</span> +<span class="c1">// Produces: ORDER BY `title` DESC</span> +</pre></div> +</div> +<p>You can also pass your own string in the first parameter:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">order_by</span><span class="p">(</span><span class="s1">'title DESC, name ASC'</span><span class="p">);</span> +<span class="c1">// Produces: ORDER BY `title` DESC, `name` ASC</span> +</pre></div> +</div> +<p>Or multiple function calls can be made if you need multiple fields.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">order_by</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'DESC'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">order_by</span><span class="p">(</span><span class="s1">'name'</span><span class="p">,</span> <span class="s1">'ASC'</span><span class="p">);</span> +<span class="c1">// Produces: ORDER BY `title` DESC, `name` ASC</span> +</pre></div> +</div> +<p>If you choose the <strong>RANDOM</strong> direction option, then the first parameters will +be ignored, unless you specify a numeric seed value.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">order_by</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'RANDOM'</span><span class="p">);</span> +<span class="c1">// Produces: ORDER BY RAND()</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">order_by</span><span class="p">(</span><span class="mi">42</span><span class="p">,</span> <span class="s1">'RANDOM'</span><span class="p">);</span> +<span class="c1">// Produces: ORDER BY RAND(42)</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">order_by() was formerly known as orderby(), which has been +removed.</p> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Random ordering is not currently supported in Oracle and +will default to ASC instead.</p> +</div> +</div> +<div class="section" id="limiting-or-counting-results"> +<h2><a class="toc-backref" href="#id5">Limiting or Counting Results</a><a class="headerlink" href="#limiting-or-counting-results" title="Permalink to this headline">¶</a></h2> +<p><strong>$this->db->limit()</strong></p> +<p>Lets you limit the number of rows you would like returned by the query:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">limit</span><span class="p">(</span><span class="mi">10</span><span class="p">);</span> <span class="c1">// Produces: LIMIT 10</span> +</pre></div> +</div> +<p>The second parameter lets you set a result offset.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">limit</span><span class="p">(</span><span class="mi">10</span><span class="p">,</span> <span class="mi">20</span><span class="p">);</span> <span class="c1">// Produces: LIMIT 20, 10 (in MySQL. Other databases have slightly different syntax)</span> +</pre></div> +</div> +<p><strong>$this->db->count_all_results()</strong></p> +<p>Permits you to determine the number of rows in a particular Active +Record query. Queries will accept Query Builder restrictors such as +<code class="docutils literal"><span class="pre">where()</span></code>, <code class="docutils literal"><span class="pre">or_where()</span></code>, <code class="docutils literal"><span class="pre">like()</span></code>, <code class="docutils literal"><span class="pre">or_like()</span></code>, etc. Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">count_all_results</span><span class="p">(</span><span class="s1">'my_table'</span><span class="p">);</span> <span class="c1">// Produces an integer, like 25</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">from</span><span class="p">(</span><span class="s1">'my_table'</span><span class="p">);</span> +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">count_all_results</span><span class="p">();</span> <span class="c1">// Produces an integer, like 17</span> +</pre></div> +</div> +<p>However, this method also resets any field values that you may have passed +to <code class="docutils literal"><span class="pre">select()</span></code>. If you need to keep them, you can pass <code class="docutils literal"><span class="pre">FALSE</span></code> as the +second parameter:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">count_all_results</span><span class="p">(</span><span class="s1">'my_table'</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span> +</pre></div> +</div> +<p><strong>$this->db->count_all()</strong></p> +<p>Permits you to determine the number of rows in a particular table. +Submit the table name in the first parameter. Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">count_all</span><span class="p">(</span><span class="s1">'my_table'</span><span class="p">);</span> <span class="c1">// Produces an integer, like 25</span> +</pre></div> +</div> +</div> +<div class="section" id="query-grouping"> +<h2><a class="toc-backref" href="#id6">Query grouping</a><a class="headerlink" href="#query-grouping" title="Permalink to this headline">¶</a></h2> +<p>Query grouping allows you to create groups of WHERE clauses by enclosing them in parentheses. This will allow +you to create queries with complex WHERE clauses. Nested groups are supported. Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'*'</span><span class="p">)</span><span class="o">-></span><span class="na">from</span><span class="p">(</span><span class="s1">'my_table'</span><span class="p">)</span> + <span class="o">-></span><span class="na">group_start</span><span class="p">()</span> + <span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'a'</span><span class="p">,</span> <span class="s1">'a'</span><span class="p">)</span> + <span class="o">-></span><span class="na">or_group_start</span><span class="p">()</span> + <span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'b'</span><span class="p">,</span> <span class="s1">'b'</span><span class="p">)</span> + <span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'c'</span><span class="p">,</span> <span class="s1">'c'</span><span class="p">)</span> + <span class="o">-></span><span class="na">group_end</span><span class="p">()</span> + <span class="o">-></span><span class="na">group_end</span><span class="p">()</span> + <span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'d'</span><span class="p">,</span> <span class="s1">'d'</span><span class="p">)</span> +<span class="o">-></span><span class="na">get</span><span class="p">();</span> + +<span class="c1">// Generates:</span> +<span class="c1">// SELECT * FROM (`my_table`) WHERE ( `a` = 'a' OR ( `b` = 'b' AND `c` = 'c' ) ) AND `d` = 'd'</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">groups need to be balanced, make sure every group_start() is matched by a group_end().</p> +</div> +<p><strong>$this->db->group_start()</strong></p> +<p>Starts a new group by adding an opening parenthesis to the WHERE clause of the query.</p> +<p><strong>$this->db->or_group_start()</strong></p> +<p>Starts a new group by adding an opening parenthesis to the WHERE clause of the query, prefixing it with ‘OR’.</p> +<p><strong>$this->db->not_group_start()</strong></p> +<p>Starts a new group by adding an opening parenthesis to the WHERE clause of the query, prefixing it with ‘NOT’.</p> +<p><strong>$this->db->or_not_group_start()</strong></p> +<p>Starts a new group by adding an opening parenthesis to the WHERE clause of the query, prefixing it with ‘OR NOT’.</p> +<p><strong>$this->db->group_end()</strong></p> +<p>Ends the current group by adding an closing parenthesis to the WHERE clause of the query.</p> +</div> +<div class="section" id="inserting-data"> +<h2><a class="toc-backref" href="#id7">Inserting Data</a><a class="headerlink" href="#inserting-data" title="Permalink to this headline">¶</a></h2> +<p><strong>$this->db->insert()</strong></p> +<p>Generates an insert string based on the data you supply, and runs the +query. You can either pass an <strong>array</strong> or an <strong>object</strong> to the +function. Here is an example using an array:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'My title'</span><span class="p">,</span> + <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'My Name'</span><span class="p">,</span> + <span class="s1">'date'</span> <span class="o">=></span> <span class="s1">'My date'</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> +<span class="c1">// Produces: INSERT INTO mytable (title, name, date) VALUES ('My title', 'My name', 'My date')</span> +</pre></div> +</div> +<p>The first parameter will contain the table name, the second is an +associative array of values.</p> +<p>Here is an example using an object:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="cm">/*</span> +<span class="cm">class Myclass {</span> +<span class="cm"> public $title = 'My Title';</span> +<span class="cm"> public $content = 'My Content';</span> +<span class="cm"> public $date = 'My Date';</span> +<span class="cm">}</span> +<span class="cm">*/</span> + +<span class="nv">$object</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Myclass</span><span class="p">;</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$object</span><span class="p">);</span> +<span class="c1">// Produces: INSERT INTO mytable (title, content, date) VALUES ('My Title', 'My Content', 'My Date')</span> +</pre></div> +</div> +<p>The first parameter will contain the table name, the second is an +object.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">All values are escaped automatically producing safer queries.</p> +</div> +<p><strong>$this->db->get_compiled_insert()</strong></p> +<p>Compiles the insertion query just like $this->db->insert() but does not +<em>run</em> the query. This method simply returns the SQL query as a string.</p> +<p>Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'My title'</span><span class="p">,</span> + <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'My Name'</span><span class="p">,</span> + <span class="s1">'date'</span> <span class="o">=></span> <span class="s1">'My date'</span> +<span class="p">);</span> + +<span class="nv">$sql</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="nv">$data</span><span class="p">)</span><span class="o">-></span><span class="na">get_compiled_insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> +<span class="k">echo</span> <span class="nv">$sql</span><span class="p">;</span> + +<span class="c1">// Produces string: INSERT INTO mytable (`title`, `name`, `date`) VALUES ('My title', 'My name', 'My date')</span> +</pre></div> +</div> +<p>The second parameter enables you to set whether or not the query builder query +will be reset (by default it will be–just like $this->db->insert()):</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'My Title'</span><span class="p">)</span><span class="o">-></span><span class="na">get_compiled_insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span> + +<span class="c1">// Produces string: INSERT INTO mytable (`title`) VALUES ('My Title')</span> + +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="s1">'content'</span><span class="p">,</span> <span class="s1">'My Content'</span><span class="p">)</span><span class="o">-></span><span class="na">get_compiled_insert</span><span class="p">();</span> + +<span class="c1">// Produces string: INSERT INTO mytable (`title`, `content`) VALUES ('My Title', 'My Content')</span> +</pre></div> +</div> +<p>The key thing to notice in the above example is that the second query did not +utilize <cite>$this->db->from()</cite> nor did it pass a table name into the first +parameter. The reason this worked is because the query has not been executed +using <cite>$this->db->insert()</cite> which resets values or reset directly using +<cite>$this->db->reset_query()</cite>.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">This method doesn’t work for batched inserts.</p> +</div> +<p><strong>$this->db->insert_batch()</strong></p> +<p>Generates an insert string based on the data you supply, and runs the +query. You can either pass an <strong>array</strong> or an <strong>object</strong> to the +function. Here is an example using an array:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'My title'</span><span class="p">,</span> + <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'My Name'</span><span class="p">,</span> + <span class="s1">'date'</span> <span class="o">=></span> <span class="s1">'My date'</span> + <span class="p">),</span> + <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Another title'</span><span class="p">,</span> + <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'Another Name'</span><span class="p">,</span> + <span class="s1">'date'</span> <span class="o">=></span> <span class="s1">'Another date'</span> + <span class="p">)</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert_batch</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> +<span class="c1">// Produces: INSERT INTO mytable (title, name, date) VALUES ('My title', 'My name', 'My date'), ('Another title', 'Another name', 'Another date')</span> +</pre></div> +</div> +<p>The first parameter will contain the table name, the second is an +associative array of values.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">All values are escaped automatically producing safer queries.</p> +</div> +</div> +<div class="section" id="updating-data"> +<h2><a class="toc-backref" href="#id8">Updating Data</a><a class="headerlink" href="#updating-data" title="Permalink to this headline">¶</a></h2> +<p><strong>$this->db->replace()</strong></p> +<p>This method executes a REPLACE statement, which is basically the SQL +standard for (optional) DELETE + INSERT, using <em>PRIMARY</em> and <em>UNIQUE</em> +keys as the determining factor. +In our case, it will save you from the need to implement complex +logics with different combinations of <code class="docutils literal"><span class="pre">select()</span></code>, <code class="docutils literal"><span class="pre">update()</span></code>, +<code class="docutils literal"><span class="pre">delete()</span></code> and <code class="docutils literal"><span class="pre">insert()</span></code> calls.</p> +<p>Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'My title'</span><span class="p">,</span> + <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'My Name'</span><span class="p">,</span> + <span class="s1">'date'</span> <span class="o">=></span> <span class="s1">'My date'</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">replace</span><span class="p">(</span><span class="s1">'table'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> + +<span class="c1">// Executes: REPLACE INTO mytable (title, name, date) VALUES ('My title', 'My name', 'My date')</span> +</pre></div> +</div> +<p>In the above example, if we assume that the <em>title</em> field is our primary +key, then if a row containing ‘My title’ as the <em>title</em> value, that row +will be deleted with our new row data replacing it.</p> +<p>Usage of the <code class="docutils literal"><span class="pre">set()</span></code> method is also allowed and all fields are +automatically escaped, just like with <code class="docutils literal"><span class="pre">insert()</span></code>.</p> +<p><strong>$this->db->set()</strong></p> +<p>This function enables you to set values for inserts or updates.</p> +<p><strong>It can be used instead of passing a data array directly to the insert +or update functions:</strong></p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="s1">'name'</span><span class="p">,</span> <span class="nv">$name</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> <span class="c1">// Produces: INSERT INTO mytable (`name`) VALUES ('{$name}')</span> +</pre></div> +</div> +<p>If you use multiple function called they will be assembled properly +based on whether you are doing an insert or an update:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="s1">'name'</span><span class="p">,</span> <span class="nv">$name</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="nv">$title</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="s1">'status'</span><span class="p">,</span> <span class="nv">$status</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> +</pre></div> +</div> +<p><strong>set()</strong> will also accept an optional third parameter (<code class="docutils literal"><span class="pre">$escape</span></code>), that +will prevent data from being escaped if set to FALSE. To illustrate the +difference, here is <code class="docutils literal"><span class="pre">set()</span></code> used both with and without the escape +parameter.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="s1">'field'</span><span class="p">,</span> <span class="s1">'field+1'</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'id'</span><span class="p">,</span> <span class="mi">2</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> <span class="c1">// gives UPDATE mytable SET field = field+1 WHERE id = 2</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="s1">'field'</span><span class="p">,</span> <span class="s1">'field+1'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'id'</span><span class="p">,</span> <span class="mi">2</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> <span class="c1">// gives UPDATE `mytable` SET `field` = 'field+1' WHERE `id` = 2</span> +</pre></div> +</div> +<p>You can also pass an associative array to this function:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$array</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="nv">$title</span><span class="p">,</span> + <span class="s1">'status'</span> <span class="o">=></span> <span class="nv">$status</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="nv">$array</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> +</pre></div> +</div> +<p>Or an object:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="cm">/*</span> +<span class="cm">class Myclass {</span> +<span class="cm"> public $title = 'My Title';</span> +<span class="cm"> public $content = 'My Content';</span> +<span class="cm"> public $date = 'My Date';</span> +<span class="cm">}</span> +<span class="cm">*/</span> + +<span class="nv">$object</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Myclass</span><span class="p">;</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set</span><span class="p">(</span><span class="nv">$object</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> +</pre></div> +</div> +<p><strong>$this->db->update()</strong></p> +<p>Generates an update string and runs the query based on the data you +supply. You can pass an <strong>array</strong> or an <strong>object</strong> to the function. Here +is an example using an array:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="nv">$title</span><span class="p">,</span> + <span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span> + <span class="s1">'date'</span> <span class="o">=></span> <span class="nv">$date</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'id'</span><span class="p">,</span> <span class="nv">$id</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> +<span class="c1">// Produces:</span> +<span class="c1">//</span> +<span class="c1">// UPDATE mytable</span> +<span class="c1">// SET title = '{$title}', name = '{$name}', date = '{$date}'</span> +<span class="c1">// WHERE id = $id</span> +</pre></div> +</div> +<p>Or you can supply an object:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="cm">/*</span> +<span class="cm">class Myclass {</span> +<span class="cm"> public $title = 'My Title';</span> +<span class="cm"> public $content = 'My Content';</span> +<span class="cm"> public $date = 'My Date';</span> +<span class="cm">}</span> +<span class="cm">*/</span> + +<span class="nv">$object</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Myclass</span><span class="p">;</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'id'</span><span class="p">,</span> <span class="nv">$id</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$object</span><span class="p">);</span> +<span class="c1">// Produces:</span> +<span class="c1">//</span> +<span class="c1">// UPDATE `mytable`</span> +<span class="c1">// SET `title` = '{$title}', `name` = '{$name}', `date` = '{$date}'</span> +<span class="c1">// WHERE id = `$id`</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">All values are escaped automatically producing safer queries.</p> +</div> +<p>You’ll notice the use of the $this->db->where() function, enabling you +to set the WHERE clause. You can optionally pass this information +directly into the update function as a string:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">,</span> <span class="s2">"id = 4"</span><span class="p">);</span> +</pre></div> +</div> +<p>Or as an array:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">'id'</span> <span class="o">=></span> <span class="nv">$id</span><span class="p">));</span> +</pre></div> +</div> +<p>You may also use the $this->db->set() function described above when +performing updates.</p> +<p><strong>$this->db->update_batch()</strong></p> +<p>Generates an update string based on the data you supply, and runs the query. +You can either pass an <strong>array</strong> or an <strong>object</strong> to the function. +Here is an example using an array:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'My title'</span> <span class="p">,</span> + <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'My Name 2'</span> <span class="p">,</span> + <span class="s1">'date'</span> <span class="o">=></span> <span class="s1">'My date 2'</span> + <span class="p">),</span> + <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Another title'</span> <span class="p">,</span> + <span class="s1">'name'</span> <span class="o">=></span> <span class="s1">'Another Name 2'</span> <span class="p">,</span> + <span class="s1">'date'</span> <span class="o">=></span> <span class="s1">'Another date 2'</span> + <span class="p">)</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update_batch</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">,</span> <span class="s1">'title'</span><span class="p">);</span> + +<span class="c1">// Produces:</span> +<span class="c1">// UPDATE `mytable` SET `name` = CASE</span> +<span class="c1">// WHEN `title` = 'My title' THEN 'My Name 2'</span> +<span class="c1">// WHEN `title` = 'Another title' THEN 'Another Name 2'</span> +<span class="c1">// ELSE `name` END,</span> +<span class="c1">// `date` = CASE</span> +<span class="c1">// WHEN `title` = 'My title' THEN 'My date 2'</span> +<span class="c1">// WHEN `title` = 'Another title' THEN 'Another date 2'</span> +<span class="c1">// ELSE `date` END</span> +<span class="c1">// WHERE `title` IN ('My title','Another title')</span> +</pre></div> +</div> +<p>The first parameter will contain the table name, the second is an associative +array of values, the third parameter is the where key.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">All values are escaped automatically producing safer queries.</p> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last"><code class="docutils literal"><span class="pre">affected_rows()</span></code> won’t give you proper results with this method, +due to the very nature of how it works. Instead, <code class="docutils literal"><span class="pre">update_batch()</span></code> +returns the number of rows affected.</p> +</div> +<p><strong>$this->db->get_compiled_update()</strong></p> +<p>This works exactly the same way as <code class="docutils literal"><span class="pre">$this->db->get_compiled_insert()</span></code> except +that it produces an UPDATE SQL string instead of an INSERT SQL string.</p> +<p>For more information view documentation for <cite>$this->db->get_compiled_insert()</cite>.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">This method doesn’t work for batched updates.</p> +</div> +</div> +<div class="section" id="deleting-data"> +<h2><a class="toc-backref" href="#id9">Deleting Data</a><a class="headerlink" href="#deleting-data" title="Permalink to this headline">¶</a></h2> +<p><strong>$this->db->delete()</strong></p> +<p>Generates a delete SQL string and runs the query.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">delete</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">'id'</span> <span class="o">=></span> <span class="nv">$id</span><span class="p">));</span> <span class="c1">// Produces: // DELETE FROM mytable // WHERE id = $id</span> +</pre></div> +</div> +<p>The first parameter is the table name, the second is the where clause. +You can also use the where() or or_where() functions instead of passing +the data to the second parameter of the function:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'id'</span><span class="p">,</span> <span class="nv">$id</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">delete</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> + +<span class="c1">// Produces:</span> +<span class="c1">// DELETE FROM mytable</span> +<span class="c1">// WHERE id = $id</span> +</pre></div> +</div> +<p>An array of table names can be passed into delete() if you would like to +delete data from more than 1 table.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$tables</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'table1'</span><span class="p">,</span> <span class="s1">'table2'</span><span class="p">,</span> <span class="s1">'table3'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'id'</span><span class="p">,</span> <span class="s1">'5'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">delete</span><span class="p">(</span><span class="nv">$tables</span><span class="p">);</span> +</pre></div> +</div> +<p>If you want to delete all data from a table, you can use the truncate() +function, or empty_table().</p> +<p><strong>$this->db->empty_table()</strong></p> +<p>Generates a delete SQL string and runs the +query.:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">empty_table</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> <span class="c1">// Produces: DELETE FROM mytable</span> +</pre></div> +</div> +<p><strong>$this->db->truncate()</strong></p> +<p>Generates a truncate SQL string and runs the query.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">from</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">truncate</span><span class="p">();</span> + +<span class="c1">// or</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">truncate</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> + +<span class="c1">// Produce:</span> +<span class="c1">// TRUNCATE mytable</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">If the TRUNCATE command isn’t available, truncate() will +execute as “DELETE FROM table”.</p> +</div> +<p><strong>$this->db->get_compiled_delete()</strong></p> +<p>This works exactly the same way as <code class="docutils literal"><span class="pre">$this->db->get_compiled_insert()</span></code> except +that it produces a DELETE SQL string instead of an INSERT SQL string.</p> +<p>For more information view documentation for $this->db->get_compiled_insert().</p> +</div> +<div class="section" id="method-chaining"> +<h2><a class="toc-backref" href="#id10">Method Chaining</a><a class="headerlink" href="#method-chaining" title="Permalink to this headline">¶</a></h2> +<p>Method chaining allows you to simplify your syntax by connecting +multiple functions. Consider this example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'title'</span><span class="p">)</span> + <span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'id'</span><span class="p">,</span> <span class="nv">$id</span><span class="p">)</span> + <span class="o">-></span><span class="na">limit</span><span class="p">(</span><span class="mi">10</span><span class="p">,</span> <span class="mi">20</span><span class="p">)</span> + <span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">);</span> +</pre></div> +</div> +</div> +<div class="section" id="query-builder-caching"> +<span id="ar-caching"></span><h2><a class="toc-backref" href="#id11">Query Builder Caching</a><a class="headerlink" href="#query-builder-caching" title="Permalink to this headline">¶</a></h2> +<p>While not “true” caching, Query Builder enables you to save (or “cache”) +certain parts of your queries for reuse at a later point in your +script’s execution. Normally, when an Query Builder call is completed, +all stored information is reset for the next call. With caching, you can +prevent this reset, and reuse information easily.</p> +<p>Cached calls are cumulative. If you make 2 cached select() calls, and +then 2 uncached select() calls, this will result in 4 select() calls. +There are three Caching functions available:</p> +<p><strong>$this->db->start_cache()</strong></p> +<p>This function must be called to begin caching. All Query Builder queries +of the correct type (see below for supported queries) are stored for +later use.</p> +<p><strong>$this->db->stop_cache()</strong></p> +<p>This function can be called to stop caching.</p> +<p><strong>$this->db->flush_cache()</strong></p> +<p>This function deletes all items from the Query Builder cache.</p> +<div class="section" id="an-example-of-caching"> +<h3>An example of caching<a class="headerlink" href="#an-example-of-caching" title="Permalink to this headline">¶</a></h3> +<p>Here’s a usage example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">start_cache</span><span class="p">();</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'field1'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">stop_cache</span><span class="p">();</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'tablename'</span><span class="p">);</span> +<span class="c1">//Generates: SELECT `field1` FROM (`tablename`)</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'field2'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'tablename'</span><span class="p">);</span> +<span class="c1">//Generates: SELECT `field1`, `field2` FROM (`tablename`)</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">flush_cache</span><span class="p">();</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="s1">'field2'</span><span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'tablename'</span><span class="p">);</span> +<span class="c1">//Generates: SELECT `field2` FROM (`tablename`)</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">The following statements can be cached: select, from, join, +where, like, group_by, having, order_by</p> +</div> +</div> +</div> +<div class="section" id="resetting-query-builder"> +<h2><a class="toc-backref" href="#id12">Resetting Query Builder</a><a class="headerlink" href="#resetting-query-builder" title="Permalink to this headline">¶</a></h2> +<p><strong>$this->db->reset_query()</strong></p> +<p>Resetting Query Builder allows you to start fresh with your query without +executing it first using a method like $this->db->get() or $this->db->insert(). +Just like the methods that execute a query, this will <em>not</em> reset items you’ve +cached using <a class="reference internal" href="#query-builder-caching">Query Builder Caching</a>.</p> +<p>This is useful in situations where you are using Query Builder to generate SQL +(ex. <code class="docutils literal"><span class="pre">$this->db->get_compiled_select()</span></code>) but then choose to, for instance, +run the query:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Note that the second parameter of the get_compiled_select method is FALSE</span> +<span class="nv">$sql</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">select</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'field1'</span><span class="p">,</span><span class="s1">'field2'</span><span class="p">))</span> + <span class="o">-></span><span class="na">where</span><span class="p">(</span><span class="s1">'field3'</span><span class="p">,</span><span class="mi">5</span><span class="p">)</span> + <span class="o">-></span><span class="na">get_compiled_select</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span> + +<span class="c1">// ...</span> +<span class="c1">// Do something crazy with the SQL code... like add it to a cron script for</span> +<span class="c1">// later execution or something...</span> +<span class="c1">// ...</span> + +<span class="nv">$data</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">()</span><span class="o">-></span><span class="na">result_array</span><span class="p">();</span> + +<span class="c1">// Would execute and return an array of results of the following query:</span> +<span class="c1">// SELECT field1, field1 from mytable where field3 = 5;</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Double calls to <code class="docutils literal"><span class="pre">get_compiled_select()</span></code> while you’re using the +Query Builder Caching functionality and NOT resetting your queries +will results in the cache being merged twice. That in turn will +i.e. if you’re caching a <code class="docutils literal"><span class="pre">select()</span></code> - select the same field twice.</p> +</div> +</div> +<div class="section" id="class-reference"> +<h2><a class="toc-backref" href="#id13">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2> +<dl class="class"> +<dt id="CI_DB_query_builder"> +<em class="property">class </em><code class="descname">CI_DB_query_builder</code><a class="headerlink" href="#CI_DB_query_builder" title="Permalink to this definition">¶</a></dt> +<dd><dl class="method"> +<dt id="CI_DB_query_builder::reset_query"> +<code class="descname">reset_query</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::reset_query" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_DB_query_builder instance (method chaining)</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_DB_query_builder</td> +</tr> +</tbody> +</table> +<p>Resets the current Query Builder state. Useful when you want +to build a query that can be cancelled under certain conditions.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::start_cache"> +<code class="descname">start_cache</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::start_cache" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_DB_query_builder instance (method chaining)</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_DB_query_builder</td> +</tr> +</tbody> +</table> +<p>Starts the Query Builder cache.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::stop_cache"> +<code class="descname">stop_cache</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::stop_cache" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_DB_query_builder instance (method chaining)</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_DB_query_builder</td> +</tr> +</tbody> +</table> +<p>Stops the Query Builder cache.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::flush_cache"> +<code class="descname">flush_cache</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::flush_cache" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_DB_query_builder instance (method chaining)</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_DB_query_builder</td> +</tr> +</tbody> +</table> +<p>Empties the Query Builder cache.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::set_dbprefix"> +<code class="descname">set_dbprefix</code><span class="sig-paren">(</span><span class="optional">[</span><em>$prefix = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::set_dbprefix" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$prefix</strong> (<em>string</em>) – The new prefix to use</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The DB prefix in use</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> +</td> +</tr> +</tbody> +</table> +<p>Sets the database prefix, without having to reconnect.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::dbprefix"> +<code class="descname">dbprefix</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::dbprefix" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – The table name to prefix</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The prefixed table name</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> +</td> +</tr> +</tbody> +</table> +<p>Prepends a database prefix, if one exists in configuration.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::count_all_results"> +<code class="descname">count_all_results</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$reset = TRUE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::count_all_results" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$reset</strong> (<em>bool</em>) – Whether to reset values for SELECTs</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Number of rows in the query result</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">int</p> +</td> +</tr> +</tbody> +</table> +<p>Generates a platform-specific query string that counts +all records returned by an Query Builder query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::get"> +<code class="descname">get</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$limit = NULL</em><span class="optional">[</span>, <em>$offset = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::get" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – The table to query</li> +<li><strong>$limit</strong> (<em>int</em>) – The LIMIT clause</li> +<li><strong>$offset</strong> (<em>int</em>) – The OFFSET clause</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_result instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_result</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles and runs SELECT statement based on the already +called Query Builder methods.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::get_where"> +<code class="descname">get_where</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$where = NULL</em><span class="optional">[</span>, <em>$limit = NULL</em><span class="optional">[</span>, <em>$offset = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::get_where" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>mixed</em>) – The table(s) to fetch data from; string or array</li> +<li><strong>$where</strong> (<em>string</em>) – The WHERE clause</li> +<li><strong>$limit</strong> (<em>int</em>) – The LIMIT clause</li> +<li><strong>$offset</strong> (<em>int</em>) – The OFFSET clause</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_result instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_result</p> +</td> +</tr> +</tbody> +</table> +<p>Same as <code class="docutils literal"><span class="pre">get()</span></code>, but also allows the WHERE to be added directly.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::select"> +<code class="descname">select</code><span class="sig-paren">(</span><span class="optional">[</span><em>$select = '*'</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::select" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$select</strong> (<em>string</em>) – The SELECT portion of a query</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a SELECT clause to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::select_avg"> +<code class="descname">select_avg</code><span class="sig-paren">(</span><span class="optional">[</span><em>$select = ''</em><span class="optional">[</span>, <em>$alias = ''</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::select_avg" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$select</strong> (<em>string</em>) – Field to compute the average of</li> +<li><strong>$alias</strong> (<em>string</em>) – Alias for the resulting value name</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a SELECT AVG(field) clause to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::select_max"> +<code class="descname">select_max</code><span class="sig-paren">(</span><span class="optional">[</span><em>$select = ''</em><span class="optional">[</span>, <em>$alias = ''</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::select_max" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$select</strong> (<em>string</em>) – Field to compute the maximum of</li> +<li><strong>$alias</strong> (<em>string</em>) – Alias for the resulting value name</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a SELECT MAX(field) clause to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::select_min"> +<code class="descname">select_min</code><span class="sig-paren">(</span><span class="optional">[</span><em>$select = ''</em><span class="optional">[</span>, <em>$alias = ''</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::select_min" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$select</strong> (<em>string</em>) – Field to compute the minimum of</li> +<li><strong>$alias</strong> (<em>string</em>) – Alias for the resulting value name</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a SELECT MIN(field) clause to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::select_sum"> +<code class="descname">select_sum</code><span class="sig-paren">(</span><span class="optional">[</span><em>$select = ''</em><span class="optional">[</span>, <em>$alias = ''</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::select_sum" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$select</strong> (<em>string</em>) – Field to compute the sum of</li> +<li><strong>$alias</strong> (<em>string</em>) – Alias for the resulting value name</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a SELECT SUM(field) clause to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::distinct"> +<code class="descname">distinct</code><span class="sig-paren">(</span><span class="optional">[</span><em>$val = TRUE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::distinct" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$val</strong> (<em>bool</em>) – Desired value of the “distinct” flag</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Sets a flag which tells the query builder to add +a DISTINCT clause to the SELECT portion of the query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::from"> +<code class="descname">from</code><span class="sig-paren">(</span><em>$from</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::from" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$from</strong> (<em>mixed</em>) – Table name(s); string or array</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Specifies the FROM clause of a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::join"> +<code class="descname">join</code><span class="sig-paren">(</span><em>$table</em>, <em>$cond</em><span class="optional">[</span>, <em>$type = ''</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::join" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name to join</li> +<li><strong>$cond</strong> (<em>string</em>) – The JOIN ON condition</li> +<li><strong>$type</strong> (<em>string</em>) – The JOIN type</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a JOIN clause to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::where"> +<code class="descname">where</code><span class="sig-paren">(</span><em>$key</em><span class="optional">[</span>, <em>$value = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::where" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>mixed</em>) – Name of field to compare, or associative array</li> +<li><strong>$value</strong> (<em>mixed</em>) – If a single key, compared to this value</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">DB_query_builder instance</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">object</p> +</td> +</tr> +</tbody> +</table> +<p>Generates the WHERE portion of the query. +Separates multiple calls with ‘AND’.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::or_where"> +<code class="descname">or_where</code><span class="sig-paren">(</span><em>$key</em><span class="optional">[</span>, <em>$value = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::or_where" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>mixed</em>) – Name of field to compare, or associative array</li> +<li><strong>$value</strong> (<em>mixed</em>) – If a single key, compared to this value</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">DB_query_builder instance</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">object</p> +</td> +</tr> +</tbody> +</table> +<p>Generates the WHERE portion of the query. +Separates multiple calls with ‘OR’.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::or_where_in"> +<code class="descname">or_where_in</code><span class="sig-paren">(</span><span class="optional">[</span><em>$key = NULL</em><span class="optional">[</span>, <em>$values = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::or_where_in" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>string</em>) – The field to search</li> +<li><strong>$values</strong> (<em>array</em>) – The values searched on</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">DB_query_builder instance</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">object</p> +</td> +</tr> +</tbody> +</table> +<p>Generates a WHERE field IN(‘item’, ‘item’) SQL query, +joined with ‘OR’ if appropriate.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::or_where_not_in"> +<code class="descname">or_where_not_in</code><span class="sig-paren">(</span><span class="optional">[</span><em>$key = NULL</em><span class="optional">[</span>, <em>$values = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::or_where_not_in" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>string</em>) – The field to search</li> +<li><strong>$values</strong> (<em>array</em>) – The values searched on</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">DB_query_builder instance</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">object</p> +</td> +</tr> +</tbody> +</table> +<p>Generates a WHERE field NOT IN(‘item’, ‘item’) SQL query, +joined with ‘OR’ if appropriate.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::where_in"> +<code class="descname">where_in</code><span class="sig-paren">(</span><span class="optional">[</span><em>$key = NULL</em><span class="optional">[</span>, <em>$values = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::where_in" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>string</em>) – Name of field to examine</li> +<li><strong>$values</strong> (<em>array</em>) – Array of target values</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">DB_query_builder instance</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">object</p> +</td> +</tr> +</tbody> +</table> +<p>Generates a WHERE field IN(‘item’, ‘item’) SQL query, +joined with ‘AND’ if appropriate.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::where_not_in"> +<code class="descname">where_not_in</code><span class="sig-paren">(</span><span class="optional">[</span><em>$key = NULL</em><span class="optional">[</span>, <em>$values = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::where_not_in" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>string</em>) – Name of field to examine</li> +<li><strong>$values</strong> (<em>array</em>) – Array of target values</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">DB_query_builder instance</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">object</p> +</td> +</tr> +</tbody> +</table> +<p>Generates a WHERE field NOT IN(‘item’, ‘item’) SQL query, +joined with ‘AND’ if appropriate.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::group_start"> +<code class="descname">group_start</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::group_start" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_DB_query_builder instance (method chaining)</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_DB_query_builder</td> +</tr> +</tbody> +</table> +<p>Starts a group expression, using ANDs for the conditions inside it.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::or_group_start"> +<code class="descname">or_group_start</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::or_group_start" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_DB_query_builder instance (method chaining)</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_DB_query_builder</td> +</tr> +</tbody> +</table> +<p>Starts a group expression, using ORs for the conditions inside it.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::not_group_start"> +<code class="descname">not_group_start</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::not_group_start" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_DB_query_builder instance (method chaining)</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_DB_query_builder</td> +</tr> +</tbody> +</table> +<p>Starts a group expression, using AND NOTs for the conditions inside it.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::or_not_group_start"> +<code class="descname">or_not_group_start</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::or_not_group_start" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_DB_query_builder instance (method chaining)</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_DB_query_builder</td> +</tr> +</tbody> +</table> +<p>Starts a group expression, using OR NOTs for the conditions inside it.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::group_end"> +<code class="descname">group_end</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::group_end" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">DB_query_builder instance</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">object</td> +</tr> +</tbody> +</table> +<p>Ends a group expression.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::like"> +<code class="descname">like</code><span class="sig-paren">(</span><em>$field</em><span class="optional">[</span>, <em>$match = ''</em><span class="optional">[</span>, <em>$side = 'both'</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::like" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$field</strong> (<em>string</em>) – Field name</li> +<li><strong>$match</strong> (<em>string</em>) – Text portion to match</li> +<li><strong>$side</strong> (<em>string</em>) – Which side of the expression to put the ‘%’ wildcard on</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a LIKE clause to a query, separating multiple calls with AND.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::or_like"> +<code class="descname">or_like</code><span class="sig-paren">(</span><em>$field</em><span class="optional">[</span>, <em>$match = ''</em><span class="optional">[</span>, <em>$side = 'both'</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::or_like" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$field</strong> (<em>string</em>) – Field name</li> +<li><strong>$match</strong> (<em>string</em>) – Text portion to match</li> +<li><strong>$side</strong> (<em>string</em>) – Which side of the expression to put the ‘%’ wildcard on</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a LIKE clause to a query, separating multiple class with OR.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::not_like"> +<code class="descname">not_like</code><span class="sig-paren">(</span><em>$field</em><span class="optional">[</span>, <em>$match = ''</em><span class="optional">[</span>, <em>$side = 'both'</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::not_like" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$field</strong> (<em>string</em>) – Field name</li> +<li><strong>$match</strong> (<em>string</em>) – Text portion to match</li> +<li><strong>$side</strong> (<em>string</em>) – Which side of the expression to put the ‘%’ wildcard on</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a NOT LIKE clause to a query, separating multiple calls with AND.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::or_not_like"> +<code class="descname">or_not_like</code><span class="sig-paren">(</span><em>$field</em><span class="optional">[</span>, <em>$match = ''</em><span class="optional">[</span>, <em>$side = 'both'</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::or_not_like" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$field</strong> (<em>string</em>) – Field name</li> +<li><strong>$match</strong> (<em>string</em>) – Text portion to match</li> +<li><strong>$side</strong> (<em>string</em>) – Which side of the expression to put the ‘%’ wildcard on</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a NOT LIKE clause to a query, separating multiple calls with OR.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::having"> +<code class="descname">having</code><span class="sig-paren">(</span><em>$key</em><span class="optional">[</span>, <em>$value = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::having" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>mixed</em>) – Identifier (string) or associative array of field/value pairs</li> +<li><strong>$value</strong> (<em>string</em>) – Value sought if $key is an identifier</li> +<li><strong>$escape</strong> (<em>string</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a HAVING clause to a query, separating multiple calls with AND.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::or_having"> +<code class="descname">or_having</code><span class="sig-paren">(</span><em>$key</em><span class="optional">[</span>, <em>$value = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::or_having" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>mixed</em>) – Identifier (string) or associative array of field/value pairs</li> +<li><strong>$value</strong> (<em>string</em>) – Value sought if $key is an identifier</li> +<li><strong>$escape</strong> (<em>string</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a HAVING clause to a query, separating multiple calls with OR.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::group_by"> +<code class="descname">group_by</code><span class="sig-paren">(</span><em>$by</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::group_by" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$by</strong> (<em>mixed</em>) – Field(s) to group by; string or array</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds a GROUP BY clause to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::order_by"> +<code class="descname">order_by</code><span class="sig-paren">(</span><em>$orderby</em><span class="optional">[</span>, <em>$direction = ''</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::order_by" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$orderby</strong> (<em>string</em>) – Field to order by</li> +<li><strong>$direction</strong> (<em>string</em>) – The order requested - ASC, DESC or random</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds an ORDER BY clause to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::limit"> +<code class="descname">limit</code><span class="sig-paren">(</span><em>$value</em><span class="optional">[</span>, <em>$offset = 0</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::limit" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$value</strong> (<em>int</em>) – Number of rows to limit the results to</li> +<li><strong>$offset</strong> (<em>int</em>) – Number of rows to skip</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds LIMIT and OFFSET clauses to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::offset"> +<code class="descname">offset</code><span class="sig-paren">(</span><em>$offset</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::offset" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$offset</strong> (<em>int</em>) – Number of rows to skip</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds an OFFSET clause to a query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::set"> +<code class="descname">set</code><span class="sig-paren">(</span><em>$key</em><span class="optional">[</span>, <em>$value = ''</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::set" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>mixed</em>) – Field name, or an array of field/value pairs</li> +<li><strong>$value</strong> (<em>string</em>) – Field value, if $key is a single field</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds field/value pairs to be passed later to <code class="docutils literal"><span class="pre">insert()</span></code>, +<code class="docutils literal"><span class="pre">update()</span></code> or <code class="docutils literal"><span class="pre">replace()</span></code>.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::insert"> +<code class="descname">insert</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$set = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::insert" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$set</strong> (<em>array</em>) – An associative array of field/value pairs</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles and executes an INSERT statement.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::insert_batch"> +<code class="descname">insert_batch</code><span class="sig-paren">(</span><em>$table</em><span class="optional">[</span>, <em>$set = NULL</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">[</span>, <em>$batch_size = 100</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::insert_batch" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$set</strong> (<em>array</em>) – Data to insert</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +<li><strong>$batch_size</strong> (<em>int</em>) – Count of rows to insert at once</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Number of rows inserted or FALSE on failure</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles and executes batch <code class="docutils literal"><span class="pre">INSERT</span></code> statements.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">When more than <code class="docutils literal"><span class="pre">$batch_size</span></code> rows are provided, multiple +<code class="docutils literal"><span class="pre">INSERT</span></code> queries will be executed, each trying to insert +up to <code class="docutils literal"><span class="pre">$batch_size</span></code> rows.</p> +</div> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::set_insert_batch"> +<code class="descname">set_insert_batch</code><span class="sig-paren">(</span><em>$key</em><span class="optional">[</span>, <em>$value = ''</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::set_insert_batch" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>mixed</em>) – Field name or an array of field/value pairs</li> +<li><strong>$value</strong> (<em>string</em>) – Field value, if $key is a single field</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds field/value pairs to be inserted in a table later via <code class="docutils literal"><span class="pre">insert_batch()</span></code>.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::update"> +<code class="descname">update</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$set = NULL</em><span class="optional">[</span>, <em>$where = NULL</em><span class="optional">[</span>, <em>$limit = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::update" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$set</strong> (<em>array</em>) – An associative array of field/value pairs</li> +<li><strong>$where</strong> (<em>string</em>) – The WHERE clause</li> +<li><strong>$limit</strong> (<em>int</em>) – The LIMIT clause</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles and executes an UPDATE statement.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::update_batch"> +<code class="descname">update_batch</code><span class="sig-paren">(</span><em>$table</em><span class="optional">[</span>, <em>$set = NULL</em><span class="optional">[</span>, <em>$value = NULL</em><span class="optional">[</span>, <em>$batch_size = 100</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::update_batch" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$set</strong> (<em>array</em>) – Field name, or an associative array of field/value pairs</li> +<li><strong>$value</strong> (<em>string</em>) – Field value, if $set is a single field</li> +<li><strong>$batch_size</strong> (<em>int</em>) – Count of conditions to group in a single query</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Number of rows updated or FALSE on failure</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles and executes batch <code class="docutils literal"><span class="pre">UPDATE</span></code> statements.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">When more than <code class="docutils literal"><span class="pre">$batch_size</span></code> field/value pairs are provided, +multiple queries will be executed, each handling up to +<code class="docutils literal"><span class="pre">$batch_size</span></code> field/value pairs.</p> +</div> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::set_update_batch"> +<code class="descname">set_update_batch</code><span class="sig-paren">(</span><em>$key</em><span class="optional">[</span>, <em>$value = ''</em><span class="optional">[</span>, <em>$escape = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::set_update_batch" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$key</strong> (<em>mixed</em>) – Field name or an array of field/value pairs</li> +<li><strong>$value</strong> (<em>string</em>) – Field value, if $key is a single field</li> +<li><strong>$escape</strong> (<em>bool</em>) – Whether to escape values and identifiers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_DB_query_builder</p> +</td> +</tr> +</tbody> +</table> +<p>Adds field/value pairs to be updated in a table later via <code class="docutils literal"><span class="pre">update_batch()</span></code>.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::replace"> +<code class="descname">replace</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$set = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::replace" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$set</strong> (<em>array</em>) – An associative array of field/value pairs</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles and executes a REPLACE statement.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::delete"> +<code class="descname">delete</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$where = ''</em><span class="optional">[</span>, <em>$limit = NULL</em><span class="optional">[</span>, <em>$reset_data = TRUE</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::delete" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>mixed</em>) – The table(s) to delete from; string or array</li> +<li><strong>$where</strong> (<em>string</em>) – The WHERE clause</li> +<li><strong>$limit</strong> (<em>int</em>) – The LIMIT clause</li> +<li><strong>$reset_data</strong> (<em>bool</em>) – TRUE to reset the query “write” clause</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_DB_query_builder instance (method chaining) or FALSE on failure</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles and executes a DELETE query.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::truncate"> +<code class="descname">truncate</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::truncate" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p> +</td> +</tr> +</tbody> +</table> +<p>Executes a TRUNCATE statement on a table.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">If the database platform in use doesn’t support TRUNCATE, +a DELETE statement will be used instead.</p> +</div> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::empty_table"> +<code class="descname">empty_table</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::empty_table" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p> +</td> +</tr> +</tbody> +</table> +<p>Deletes all records from a table via a DELETE statement.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::get_compiled_select"> +<code class="descname">get_compiled_select</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$reset = TRUE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::get_compiled_select" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$reset</strong> (<em>bool</em>) – Whether to reset the current QB values or not</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The compiled SQL statement as a string</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles a SELECT statement and returns it as a string.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::get_compiled_insert"> +<code class="descname">get_compiled_insert</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$reset = TRUE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::get_compiled_insert" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$reset</strong> (<em>bool</em>) – Whether to reset the current QB values or not</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The compiled SQL statement as a string</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles an INSERT statement and returns it as a string.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::get_compiled_update"> +<code class="descname">get_compiled_update</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$reset = TRUE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::get_compiled_update" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$reset</strong> (<em>bool</em>) – Whether to reset the current QB values or not</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The compiled SQL statement as a string</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles an UPDATE statement and returns it as a string.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_query_builder::get_compiled_delete"> +<code class="descname">get_compiled_delete</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">[</span>, <em>$reset = TRUE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_query_builder::get_compiled_delete" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table</strong> (<em>string</em>) – Table name</li> +<li><strong>$reset</strong> (<em>bool</em>) – Whether to reset the current QB values or not</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The compiled SQL statement as a string</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> +</td> +</tr> +</tbody> +</table> +<p>Compiles a DELETE statement and returns it as a string.</p> +</dd></dl> + +</dd></dl> + +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="transactions.html" class="btn btn-neutral float-right" title="Transactions">Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="helpers.html" class="btn btn-neutral" title="Query Helper Methods"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014 - 2019, British Columbia Institute of Technology. + Last updated on Jan 16, 2019. + </p> + </div> + + Built with <a 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