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| author | Andrey Andreev <narf@devilix.net> | 2017-06-19 10:33:58 +0200 |
|---|---|---|
| committer | Andrey Andreev <narf@devilix.net> | 2017-06-19 10:33:58 +0200 |
| commit | 6c7a4266410070d30f8f6bcdf9c9e67f3d6478e3 (patch) | |
| tree | f0aab8f6f5e781d5947b1a5553b6648eb7b7a4ab /user_guide/database/utilities.html | |
| parent | 2459285b91d6fc4f5099f9f597529cce1059cb33 (diff) | |
[ci skip] 3.1.5 release
Diffstat (limited to 'user_guide/database/utilities.html')
| -rw-r--r-- | user_guide/database/utilities.html | 994 |
1 files changed, 994 insertions, 0 deletions
diff --git a/user_guide/database/utilities.html b/user_guide/database/utilities.html new file mode 100644 index 000000000..4a7dceff8 --- /dev/null +++ b/user_guide/database/utilities.html @@ -0,0 +1,994 @@ + + +<!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>Database Utility Class — CodeIgniter 3.1.5 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="top" title="CodeIgniter 3.1.5 documentation" href="../index.html"/> + <link 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class="wy-breadcrumbs-aside"> + + </li> + <div 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="database-utility-class"> +<h1>Database Utility Class<a class="headerlink" href="#database-utility-class" title="Permalink to this headline">¶</a></h1> +<p>The Database Utility Class contains methods that help you manage your +database.</p> +<div class="contents local topic" id="contents"> +<ul class="simple"> +<li><a class="reference internal" href="#initializing-the-utility-class" id="id1">Initializing the Utility Class</a></li> +<li><a class="reference internal" href="#using-the-database-utilities" id="id2">Using the Database Utilities</a><ul> +<li><a class="reference internal" href="#retrieve-list-of-database-names" id="id3">Retrieve list of database names</a></li> +<li><a class="reference internal" href="#determine-if-a-database-exists" id="id4">Determine If a Database Exists</a></li> +<li><a class="reference internal" href="#optimize-a-table" id="id5">Optimize a Table</a></li> +<li><a class="reference internal" href="#repair-a-table" id="id6">Repair a Table</a></li> +<li><a class="reference internal" href="#optimize-a-database" id="id7">Optimize a Database</a></li> +<li><a class="reference internal" href="#export-a-query-result-as-a-csv-file" id="id8">Export a Query Result as a CSV File</a></li> +<li><a class="reference internal" href="#export-a-query-result-as-an-xml-document" id="id9">Export a Query Result as an XML Document</a></li> +</ul> +</li> +<li><a class="reference internal" href="#backup-your-database" id="id10">Backup Your Database</a><ul> +<li><a class="reference internal" href="#database-backup-notes" id="id11">Database Backup Notes</a></li> +<li><a class="reference internal" href="#usage-example" id="id12">Usage Example</a></li> +<li><a class="reference internal" href="#setting-backup-preferences" id="id13">Setting Backup Preferences</a></li> +<li><a class="reference internal" href="#description-of-backup-preferences" id="id14">Description of Backup Preferences</a></li> +</ul> +</li> +<li><a class="reference internal" href="#class-reference" id="id15">Class Reference</a></li> +</ul> +</div> +<div class="section" id="initializing-the-utility-class"> +<h2><a class="toc-backref" href="#id1">Initializing the Utility Class</a><a class="headerlink" href="#initializing-the-utility-class" title="Permalink to this headline">¶</a></h2> +<div class="admonition important"> +<p class="first admonition-title">Important</p> +<p class="last">In order to initialize the Utility class, your database +driver must already be running, since the utilities class relies on it.</p> +</div> +<p>Load the Utility Class as follows:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</span><span class="p">();</span> +</pre></div> +</div> +<p>You can also pass another database object to the DB Utility loader, in case +the database you want to manage isn’t the default one:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">myutil</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</span><span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">other_db</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> +</pre></div> +</div> +<p>In the above example, we’re passing a custom database object as the first +parameter and then tell it to return the dbutil object, instead of +assigning it directly to <tt class="docutils literal"><span class="pre">$this->dbutil</span></tt>.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Both of the parameters can be used individually, just pass an empty +value as the first one if you wish to skip it.</p> +</div> +<p>Once initialized you will access the methods using the <tt class="docutils literal"><span class="pre">$this->dbutil</span></tt> +object:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">some_method</span><span class="p">();</span> +</pre></div> +</div> +</div> +<div class="section" id="using-the-database-utilities"> +<h2><a class="toc-backref" href="#id2">Using the Database Utilities</a><a class="headerlink" href="#using-the-database-utilities" title="Permalink to this headline">¶</a></h2> +<div class="section" id="retrieve-list-of-database-names"> +<h3><a class="toc-backref" href="#id3">Retrieve list of database names</a><a class="headerlink" href="#retrieve-list-of-database-names" title="Permalink to this headline">¶</a></h3> +<p>Returns an array of database names:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$dbs</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">list_databases</span><span class="p">();</span> + +<span class="k">foreach</span> <span class="p">(</span><span class="nv">$dbs</span> <span class="k">as</span> <span class="nv">$db</span><span class="p">)</span> +<span class="p">{</span> + <span class="k">echo</span> <span class="nv">$db</span><span class="p">;</span> +<span class="p">}</span> +</pre></div> +</div> +</div> +<div class="section" id="determine-if-a-database-exists"> +<h3><a class="toc-backref" href="#id4">Determine If a Database Exists</a><a class="headerlink" href="#determine-if-a-database-exists" title="Permalink to this headline">¶</a></h3> +<p>Sometimes it’s helpful to know whether a particular database exists. +Returns a boolean TRUE/FALSE. Usage example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">database_exists</span><span class="p">(</span><span class="s1">'database_name'</span><span class="p">))</span> +<span class="p">{</span> + <span class="c1">// some code...</span> +<span class="p">}</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Replace <em>database_name</em> with the name of the database you are +looking for. This method is case sensitive.</p> +</div> +</div> +<div class="section" id="optimize-a-table"> +<h3><a class="toc-backref" href="#id5">Optimize a Table</a><a class="headerlink" href="#optimize-a-table" title="Permalink to this headline">¶</a></h3> +<p>Permits you to optimize a table using the table name specified in the +first parameter. Returns TRUE/FALSE based on success or failure:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">optimize_table</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">))</span> +<span class="p">{</span> + <span class="k">echo</span> <span class="s1">'Success!'</span><span class="p">;</span> +<span class="p">}</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Not all database platforms support table optimization. It is +mostly for use with MySQL.</p> +</div> +</div> +<div class="section" id="repair-a-table"> +<h3><a class="toc-backref" href="#id6">Repair a Table</a><a class="headerlink" href="#repair-a-table" title="Permalink to this headline">¶</a></h3> +<p>Permits you to repair a table using the table name specified in the +first parameter. Returns TRUE/FALSE based on success or failure:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">repair_table</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">))</span> +<span class="p">{</span> + <span class="k">echo</span> <span class="s1">'Success!'</span><span class="p">;</span> +<span class="p">}</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Not all database platforms support table repairs.</p> +</div> +</div> +<div class="section" id="optimize-a-database"> +<h3><a class="toc-backref" href="#id7">Optimize a Database</a><a class="headerlink" href="#optimize-a-database" title="Permalink to this headline">¶</a></h3> +<p>Permits you to optimize the database your DB class is currently +connected to. Returns an array containing the DB status messages or +FALSE on failure.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$result</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">optimize_database</span><span class="p">();</span> + +<span class="k">if</span> <span class="p">(</span><span class="nv">$result</span> <span class="o">!==</span> <span class="k">FALSE</span><span class="p">)</span> +<span class="p">{</span> + <span class="nb">print_r</span><span class="p">(</span><span class="nv">$result</span><span class="p">);</span> +<span class="p">}</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Not all database platforms support database optimization. It +it is mostly for use with MySQL.</p> +</div> +</div> +<div class="section" id="export-a-query-result-as-a-csv-file"> +<h3><a class="toc-backref" href="#id8">Export a Query Result as a CSV File</a><a class="headerlink" href="#export-a-query-result-as-a-csv-file" title="Permalink to this headline">¶</a></h3> +<p>Permits you to generate a CSV file from a query result. The first +parameter of the method must contain the result object from your +query. Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</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">query</span><span class="p">(</span><span class="s2">"SELECT * FROM mytable"</span><span class="p">);</span> + +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">csv_from_result</span><span class="p">(</span><span class="nv">$query</span><span class="p">);</span> +</pre></div> +</div> +<p>The second, third, and fourth parameters allow you to set the delimiter +newline, and enclosure characters respectively. By default commas are +used as the delimiter, “n” is used as a new line, and a double-quote +is used as the enclosure. Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$delimiter</span> <span class="o">=</span> <span class="s2">","</span><span class="p">;</span> +<span class="nv">$newline</span> <span class="o">=</span> <span class="s2">"</span><span class="se">\r\n</span><span class="s2">"</span><span class="p">;</span> +<span class="nv">$enclosure</span> <span class="o">=</span> <span class="s1">'"'</span><span class="p">;</span> + +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">csv_from_result</span><span class="p">(</span><span class="nv">$query</span><span class="p">,</span> <span class="nv">$delimiter</span><span class="p">,</span> <span class="nv">$newline</span><span class="p">,</span> <span class="nv">$enclosure</span><span class="p">);</span> +</pre></div> +</div> +<div class="admonition important"> +<p class="first admonition-title">Important</p> +<p class="last">This method will NOT write the CSV file for you. It +simply creates the CSV layout. If you need to write the file +use the <a class="reference internal" href="../helpers/file_helper.html"><em>File Helper</em></a>.</p> +</div> +</div> +<div class="section" id="export-a-query-result-as-an-xml-document"> +<h3><a class="toc-backref" href="#id9">Export a Query Result as an XML Document</a><a class="headerlink" href="#export-a-query-result-as-an-xml-document" title="Permalink to this headline">¶</a></h3> +<p>Permits you to generate an XML file from a query result. The first +parameter expects a query result object, the second may contain an +optional array of config parameters. Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</span><span class="p">();</span> + +<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s2">"SELECT * FROM mytable"</span><span class="p">);</span> + +<span class="nv">$config</span> <span class="o">=</span> <span class="k">array</span> <span class="p">(</span> + <span class="s1">'root'</span> <span class="o">=></span> <span class="s1">'root'</span><span class="p">,</span> + <span class="s1">'element'</span> <span class="o">=></span> <span class="s1">'element'</span><span class="p">,</span> + <span class="s1">'newline'</span> <span class="o">=></span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span><span class="p">,</span> + <span class="s1">'tab'</span> <span class="o">=></span> <span class="s2">"</span><span class="se">\t</span><span class="s2">"</span> +<span class="p">);</span> + +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">xml_from_result</span><span class="p">(</span><span class="nv">$query</span><span class="p">,</span> <span class="nv">$config</span><span class="p">);</span> +</pre></div> +</div> +<div class="admonition important"> +<p class="first admonition-title">Important</p> +<p class="last">This method will NOT write the XML file for you. It +simply creates the XML layout. If you need to write the file +use the <a class="reference internal" href="../helpers/file_helper.html"><em>File Helper</em></a>.</p> +</div> +</div> +</div> +<div class="section" id="backup-your-database"> +<h2><a class="toc-backref" href="#id10">Backup Your Database</a><a class="headerlink" href="#backup-your-database" title="Permalink to this headline">¶</a></h2> +<div class="section" id="database-backup-notes"> +<h3><a class="toc-backref" href="#id11">Database Backup Notes</a><a class="headerlink" href="#database-backup-notes" title="Permalink to this headline">¶</a></h3> +<p>Permits you to backup your full database or individual tables. The +backup data can be compressed in either Zip or Gzip format.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">This feature is only available for MySQL and Interbase/Firebird databases.</p> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p>For Interbase/Firebird databases, the backup file name is the only parameter.</p> +<p class="last">$this->dbutil->backup(‘db_backup_filename’);</p> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Due to the limited execution time and memory available to PHP, +backing up very large databases may not be possible. If your database is +very large you might need to backup directly from your SQL server via +the command line, or have your server admin do it for you if you do not +have root privileges.</p> +</div> +</div> +<div class="section" id="usage-example"> +<h3><a class="toc-backref" href="#id12">Usage Example</a><a class="headerlink" href="#usage-example" title="Permalink to this headline">¶</a></h3> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Load the DB utility class</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</span><span class="p">();</span> + +<span class="c1">// Backup your entire database and assign it to a variable</span> +<span class="nv">$backup</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">backup</span><span class="p">();</span> + +<span class="c1">// Load the file helper and write the file to your server</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'file'</span><span class="p">);</span> +<span class="nx">write_file</span><span class="p">(</span><span class="s1">'/path/to/mybackup.gz'</span><span class="p">,</span> <span class="nv">$backup</span><span class="p">);</span> + +<span class="c1">// Load the download helper and send the file to your desktop</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'download'</span><span class="p">);</span> +<span class="nx">force_download</span><span class="p">(</span><span class="s1">'mybackup.gz'</span><span class="p">,</span> <span class="nv">$backup</span><span class="p">);</span> +</pre></div> +</div> +</div> +<div class="section" id="setting-backup-preferences"> +<h3><a class="toc-backref" href="#id13">Setting Backup Preferences</a><a class="headerlink" href="#setting-backup-preferences" title="Permalink to this headline">¶</a></h3> +<p>Backup preferences are set by submitting an array of values to the first +parameter of the <tt class="docutils literal"><span class="pre">backup()</span></tt> method. Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$prefs</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'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="c1">// Array of tables to backup.</span> + <span class="s1">'ignore'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(),</span> <span class="c1">// List of tables to omit from the backup</span> + <span class="s1">'format'</span> <span class="o">=></span> <span class="s1">'txt'</span><span class="p">,</span> <span class="c1">// gzip, zip, txt</span> + <span class="s1">'filename'</span> <span class="o">=></span> <span class="s1">'mybackup.sql'</span><span class="p">,</span> <span class="c1">// File name - NEEDED ONLY WITH ZIP FILES</span> + <span class="s1">'add_drop'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span> <span class="c1">// Whether to add DROP TABLE statements to backup file</span> + <span class="s1">'add_insert'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span> <span class="c1">// Whether to add INSERT data to backup file</span> + <span class="s1">'newline'</span> <span class="o">=></span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span> <span class="c1">// Newline character used in backup file</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">backup</span><span class="p">(</span><span class="nv">$prefs</span><span class="p">);</span> +</pre></div> +</div> +</div> +<div class="section" id="description-of-backup-preferences"> +<h3><a class="toc-backref" href="#id14">Description of Backup Preferences</a><a class="headerlink" href="#description-of-backup-preferences" title="Permalink to this headline">¶</a></h3> +<table border="1" class="docutils"> +<colgroup> +<col width="16%" /> +<col width="16%" /> +<col width="16%" /> +<col width="51%" /> +</colgroup> +<thead valign="bottom"> +<tr class="row-odd"><th class="head">Preference</th> +<th class="head">Default Value</th> +<th class="head">Options</th> +<th class="head">Description</th> +</tr> +</thead> +<tbody valign="top"> +<tr class="row-even"><td><strong>tables</strong></td> +<td>empty array</td> +<td>None</td> +<td>An array of tables you want backed up. If left blank all tables will be +exported.</td> +</tr> +<tr class="row-odd"><td><strong>ignore</strong></td> +<td>empty array</td> +<td>None</td> +<td>An array of tables you want the backup routine to ignore.</td> +</tr> +<tr class="row-even"><td><strong>format</strong></td> +<td>gzip</td> +<td>gzip, zip, txt</td> +<td>The file format of the export file.</td> +</tr> +<tr class="row-odd"><td><strong>filename</strong></td> +<td>the current date/time</td> +<td>None</td> +<td>The name of the backed-up file. The name is needed only if you are using +zip compression.</td> +</tr> +<tr class="row-even"><td><strong>add_drop</strong></td> +<td>TRUE</td> +<td>TRUE/FALSE</td> +<td>Whether to include DROP TABLE statements in your SQL export file.</td> +</tr> +<tr class="row-odd"><td><strong>add_insert</strong></td> +<td>TRUE</td> +<td>TRUE/FALSE</td> +<td>Whether to include INSERT statements in your SQL export file.</td> +</tr> +<tr class="row-even"><td><strong>newline</strong></td> +<td>“\n”</td> +<td>“\n”, “\r”, “\r\n”</td> +<td>Type of newline to use in your SQL export file.</td> +</tr> +<tr class="row-odd"><td><strong>foreign_key_checks</strong></td> +<td>TRUE</td> +<td>TRUE/FALSE</td> +<td>Whether output should keep foreign key checks enabled.</td> +</tr> +</tbody> +</table> +</div> +</div> +<div class="section" id="class-reference"> +<h2><a class="toc-backref" href="#id15">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2> +<dl class="class"> +<dt id="CI_DB_utility"> +<em class="property">class </em><tt class="descname">CI_DB_utility</tt><a class="headerlink" href="#CI_DB_utility" title="Permalink to this definition">¶</a></dt> +<dd><dl class="method"> +<dt id="CI_DB_utility::backup"> +<tt class="descname">backup</tt><big>(</big><span class="optional">[</span><em>$params = array()</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_DB_utility::backup" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$params</strong> (<em>array</em>) – An associative array of options</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">raw/(g)zipped SQL query 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>Perform a database backup, per user preferences.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_utility::database_exists"> +<tt class="descname">database_exists</tt><big>(</big><em>$database_name</em><big>)</big><a class="headerlink" href="#CI_DB_utility::database_exists" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$database_name</strong> (<em>string</em>) – Database name</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE if the database exists, FALSE otherwise</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>Check for the existence of a database.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_utility::list_databases"> +<tt class="descname">list_databases</tt><big>(</big><big>)</big><a class="headerlink" href="#CI_DB_utility::list_databases" 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">Array of database names found</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td> +</tr> +</tbody> +</table> +<p>Retrieve a list of all the database names.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_utility::optimize_database"> +<tt class="descname">optimize_database</tt><big>(</big><big>)</big><a class="headerlink" href="#CI_DB_utility::optimize_database" 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">Array of optimization messages or FALSE on failure</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td> +</tr> +</tbody> +</table> +<p>Optimizes the database.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_utility::optimize_table"> +<tt class="descname">optimize_table</tt><big>(</big><em>$table_name</em><big>)</big><a class="headerlink" href="#CI_DB_utility::optimize_table" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table_name</strong> (<em>string</em>) – Name of the table to optimize</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of optimization messages 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">array</p> +</td> +</tr> +</tbody> +</table> +<p>Optimizes a database table.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_utility::repair_table"> +<tt class="descname">repair_table</tt><big>(</big><em>$table_name</em><big>)</big><a class="headerlink" href="#CI_DB_utility::repair_table" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$table_name</strong> (<em>string</em>) – Name of the table to repair</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of repair messages 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">array</p> +</td> +</tr> +</tbody> +</table> +<p>Repairs a database table.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_utility::csv_from_result"> +<tt class="descname">csv_from_result</tt><big>(</big><em>$query</em><span class="optional">[</span>, <em>$delim = '</em>, <em>'</em><span class="optional">[</span>, <em>$newline = "n"</em><span class="optional">[</span>, <em>$enclosure = '"'</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_DB_utility::csv_from_result" 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>$query</strong> (<em>object</em>) – A database result object</li> +<li><strong>$delim</strong> (<em>string</em>) – The CSV field delimiter to use</li> +<li><strong>$newline</strong> (<em>string</em>) – The newline character to use</li> +<li><strong>$enclosure</strong> (<em>string</em>) – The enclosure delimiter 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 generated CSV file 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>Translates a database result object into a CSV document.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_DB_utility::xml_from_result"> +<tt class="descname">xml_from_result</tt><big>(</big><em>$query</em><span class="optional">[</span>, <em>$params = array()</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_DB_utility::xml_from_result" 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>$query</strong> (<em>object</em>) – A database result object</li> +<li><strong>$params</strong> (<em>array</em>) – An associative array of preferences</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The generated XML document 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>Translates a database result object into an XML document.</p> +</dd></dl> + +</dd></dl> + +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="db_driver_reference.html" class="btn btn-neutral float-right" title="DB Driver Reference">Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="forge.html" class="btn btn-neutral" title="Database Forge Class"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014 - 2017, British Columbia Institute of Technology. + Last updated on Jun 19, 2017. + </p> + </div> + + Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. + +</footer> + </div> + </div> + + </section> + + </div> + + + + + + <script type="text/javascript"> + var DOCUMENTATION_OPTIONS = { + URL_ROOT:'../', + VERSION:'3.1.5', + COLLAPSE_INDEX:false, + FILE_SUFFIX:'.html', + HAS_SOURCE: false + }; + </script> + <script type="text/javascript" src="../_static/jquery.js"></script> + <script type="text/javascript" src="../_static/underscore.js"></script> + <script type="text/javascript" src="../_static/doctools.js"></script> + + + + + + <script type="text/javascript" src="../_static/js/theme.js"></script> + + + + + <script type="text/javascript"> + jQuery(function () { + SphinxRtdTheme.StickyNav.enable(); + }); + </script> + + +</body> +</html>
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