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diff --git a/user_guide/database/db_driver_reference.html b/user_guide/database/db_driver_reference.html deleted file mode 100644 index 24a7a1e9e..000000000 --- a/user_guide/database/db_driver_reference.html +++ /dev/null @@ -1,1483 +0,0 @@ - - -<!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>DB Driver Reference — 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" - 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-<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li> -<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li> -<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li> -</ul> -</li> -</ul> - - - - </div> - - </nav> - - <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> - - - <nav class="wy-nav-top" role="navigation" aria-label="top navigation"> - <i data-toggle="wy-nav-top" class="fa fa-bars"></i> - <a href="../index.html">CodeIgniter</a> - </nav> - - - - <div class="wy-nav-content"> - <div class="rst-content"> - <div role="navigation" aria-label="breadcrumbs navigation"> - <ul class="wy-breadcrumbs"> - <li><a href="../index.html">Docs</a> »</li> - - <li><a href="index.html">Database Reference</a> »</li> - - <li>DB Driver Reference</li> - <li 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="db-driver-reference"> -<h1>DB Driver Reference<a class="headerlink" href="#db-driver-reference" title="Permalink to this headline">¶</a></h1> -<p>This is the platform-independent base DB implementation class. -This class will not be called directly. Rather, the adapter -class for the specific database will extend and instantiate it.</p> -<p>The how-to material for this has been split over several articles. -This article is intended to be a reference for them.</p> -<div class="admonition important"> -<p class="first admonition-title">Important</p> -<p class="last">Not all methods are supported by all database drivers, -some of them may fail (and return FALSE) if the underlying -driver does not support them.</p> -</div> -<dl class="class"> -<dt id="CI_DB_driver"> -<em class="property">class </em><code class="descname">CI_DB_driver</code><a class="headerlink" href="#CI_DB_driver" title="Permalink to this definition">¶</a></dt> -<dd><dl class="method"> -<dt id="CI_DB_driver::initialize"> -<code class="descname">initialize</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::initialize" 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">TRUE on success, FALSE on failure</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">bool</td> -</tr> -</tbody> -</table> -<p>Initialize database settings, establish a connection to -the database.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::db_connect"> -<code class="descname">db_connect</code><span class="sig-paren">(</span><em>$persistent = TRUE</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::db_connect" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$persistent</strong> (<em>bool</em>) – Whether to establish a persistent connection or a regular one</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Database connection resource/object 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>Establish a connection with the database.</p> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">The returned value depends on the underlying -driver in use. For example, a <code class="docutils literal"><span class="pre">mysqli</span></code> instance -will be returned with the ‘mysqli’ driver.</p> -</div> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::db_pconnect"> -<code class="descname">db_pconnect</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::db_pconnect" 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">Database connection resource/object or FALSE on failure</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">mixed</td> -</tr> -</tbody> -</table> -<p>Establish a persistent connection with the database.</p> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">This method is just an alias for <code class="docutils literal"><span class="pre">db_connect(TRUE)</span></code>.</p> -</div> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::reconnect"> -<code class="descname">reconnect</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::reconnect" 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">TRUE on success, FALSE on failure</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">bool</td> -</tr> -</tbody> -</table> -<p>Keep / reestablish the database connection if no queries -have been sent for a length of time exceeding the -server’s idle timeout.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::db_select"> -<code class="descname">db_select</code><span class="sig-paren">(</span><span class="optional">[</span><em>$database = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::db_select" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$database</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 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>Select / switch the current database.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::db_set_charset"> -<code class="descname">db_set_charset</code><span class="sig-paren">(</span><em>$charset</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::db_set_charset" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$charset</strong> (<em>string</em>) – Character set 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>Set client character set.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::platform"> -<code class="descname">platform</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::platform" 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">Platform name</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td> -</tr> -</tbody> -</table> -<p>The name of the platform in use (mysql, mssql, etc…).</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::version"> -<code class="descname">version</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::version" 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">The version of the database being used</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td> -</tr> -</tbody> -</table> -<p>Database version number.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::query"> -<code class="descname">query</code><span class="sig-paren">(</span><em>$sql</em><span class="optional">[</span>, <em>$binds = FALSE</em><span class="optional">[</span>, <em>$return_object = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::query" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$sql</strong> (<em>string</em>) – The SQL statement to execute</li> -<li><strong>$binds</strong> (<em>array</em>) – An array of binding data</li> -<li><strong>$return_object</strong> (<em>bool</em>) – Whether to return a result object or not</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE for successful “write-type” queries, CI_DB_result instance (method chaining) on “query” 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">mixed</p> -</td> -</tr> -</tbody> -</table> -<p>Execute an SQL query.</p> -<p>Accepts an SQL string as input and returns a result object -upon successful execution of a “read” type query.</p> -<p>Returns:</p> -<blockquote> -<div><ul class="simple"> -<li>Boolean TRUE upon successful execution of a “write type” queries</li> -<li>Boolean FALSE upon failure</li> -<li><code class="docutils literal"><span class="pre">CI_DB_result</span></code> object for “read type” queries</li> -</ul> -</div></blockquote> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::simple_query"> -<code class="descname">simple_query</code><span class="sig-paren">(</span><em>$sql</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::simple_query" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$sql</strong> (<em>string</em>) – The SQL statement to execute</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Whatever the underlying driver’s “query” function returns</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>A simplified version of the <code class="docutils literal"><span class="pre">query()</span></code> method, appropriate -for use when you don’t need to get a result object or to -just send a query to the database and not care for the result.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::affected_rows"> -<code class="descname">affected_rows</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::affected_rows" 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">Number of rows affected</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">int</td> -</tr> -</tbody> -</table> -<p>Returns the number of rows <em>changed</em> by the last executed query.</p> -<p>Useful for checking how much rows were created, updated or deleted -during the last executed query.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::trans_strict"> -<code class="descname">trans_strict</code><span class="sig-paren">(</span><span class="optional">[</span><em>$mode = TRUE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::trans_strict" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$mode</strong> (<em>bool</em>) – Strict mode flag</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">void</p> -</td> -</tr> -</tbody> -</table> -<p>Enable/disable transaction “strict” mode.</p> -<p>When strict mode is enabled, if you are running multiple -groups of transactions and one group fails, all subsequent -groups will be rolled back.</p> -<p>If strict mode is disabled, each group is treated -autonomously, meaning a failure of one group will not -affect any others.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::trans_off"> -<code class="descname">trans_off</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::trans_off" 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">Return type:</th><td class="field-body">void</td> -</tr> -</tbody> -</table> -<p>Disables transactions at run-time.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::trans_start"> -<code class="descname">trans_start</code><span class="sig-paren">(</span><span class="optional">[</span><em>$test_mode = FALSE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::trans_start" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$test_mode</strong> (<em>bool</em>) – Test mode flag</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>Start a transaction.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::trans_complete"> -<code class="descname">trans_complete</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::trans_complete" 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">TRUE on success, FALSE on failure</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">bool</td> -</tr> -</tbody> -</table> -<p>Complete Transaction.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::trans_status"> -<code class="descname">trans_status</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::trans_status" 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">TRUE if the transaction succeeded, FALSE if it failed</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">bool</td> -</tr> -</tbody> -</table> -<p>Lets you retrieve the transaction status flag to -determine if it has failed.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::compile_binds"> -<code class="descname">compile_binds</code><span class="sig-paren">(</span><em>$sql</em>, <em>$binds</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::compile_binds" 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>$sql</strong> (<em>string</em>) – The SQL statement</li> -<li><strong>$binds</strong> (<em>array</em>) – An array of binding data</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The updated SQL statement</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 SQL query with the bind values passed for it.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::is_write_type"> -<code class="descname">is_write_type</code><span class="sig-paren">(</span><em>$sql</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::is_write_type" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$sql</strong> (<em>string</em>) – The SQL statement</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 SQL statement is of “write type”, FALSE if not</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>Determines if a query is of a “write” type (such as -INSERT, UPDATE, DELETE) or “read” type (i.e. SELECT).</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::elapsed_time"> -<code class="descname">elapsed_time</code><span class="sig-paren">(</span><span class="optional">[</span><em>$decimals = 6</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::elapsed_time" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$decimals</strong> (<em>int</em>) – The number of decimal places</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The aggregate query elapsed time, in microseconds</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>Calculate the aggregate query elapsed time.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::total_queries"> -<code class="descname">total_queries</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::total_queries" 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">The total number of queries executed</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">int</td> -</tr> -</tbody> -</table> -<p>Returns the total number of queries that have been -executed so far.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::last_query"> -<code class="descname">last_query</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::last_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">The last query executed</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td> -</tr> -</tbody> -</table> -<p>Returns the last query that was executed.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::escape"> -<code class="descname">escape</code><span class="sig-paren">(</span><em>$str</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::escape" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$str</strong> (<em>mixed</em>) – The value to escape, or an array of multiple ones</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The escaped value(s)</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>Escapes input data based on type, including boolean and -NULLs.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::escape_str"> -<code class="descname">escape_str</code><span class="sig-paren">(</span><em>$str</em><span class="optional">[</span>, <em>$like = FALSE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::escape_str" 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>$str</strong> (<em>mixed</em>) – A string value or array of multiple ones</li> -<li><strong>$like</strong> (<em>bool</em>) – Whether or not the string will be used in a LIKE condition</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The escaped string(s)</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>Escapes string values.</p> -<div class="admonition warning"> -<p class="first admonition-title">Warning</p> -<p class="last">The returned strings do NOT include quotes -around them.</p> -</div> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::escape_like_str"> -<code class="descname">escape_like_str</code><span class="sig-paren">(</span><em>$str</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::escape_like_str" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$str</strong> (<em>mixed</em>) – A string value or array of multiple ones</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The escaped string(s)</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>Escape LIKE strings.</p> -<p>Similar to <code class="docutils literal"><span class="pre">escape_str()</span></code>, but will also escape the <code class="docutils literal"><span class="pre">%</span></code> -and <code class="docutils literal"><span class="pre">_</span></code> wildcard characters, so that they don’t cause -false-positives in LIKE conditions.</p> -<div class="admonition important"> -<p class="first admonition-title">Important</p> -<p class="last">The <code class="docutils literal"><span class="pre">escape_like_str()</span></code> method uses ‘!’ (exclamation mark) -to escape special characters for <em>LIKE</em> conditions. Because this -method escapes partial strings that you would wrap in quotes -yourself, it cannot automatically add the <code class="docutils literal"><span class="pre">ESCAPE</span> <span class="pre">'!'</span></code> -condition for you, and so you’ll have to manually do that.</p> -</div> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::primary"> -<code class="descname">primary</code><span class="sig-paren">(</span><em>$table</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::primary" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$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">The primary key name, FALSE if none</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>Retrieves the primary key of a table.</p> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">If the database platform does not support primary -key detection, the first column name may be assumed -as the primary key.</p> -</div> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::count_all"> -<code class="descname">count_all</code><span class="sig-paren">(</span><span class="optional">[</span><em>$table = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::count_all" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$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">Row count for the specified table</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>Returns the total number of rows in a table, or 0 if no -table was provided.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::list_tables"> -<code class="descname">list_tables</code><span class="sig-paren">(</span><span class="optional">[</span><em>$constrain_by_prefix = FALSE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::list_tables" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$constrain_by_prefix</strong> (<em>bool</em>) – TRUE to match table names by the configured dbprefix</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of table names 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>Gets a list of the tables in the current database.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::table_exists"> -<code class="descname">table_exists</code><span class="sig-paren">(</span><em>$table_name</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::table_exists" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$table_name</strong> (<em>string</em>) – The 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 if that table exists, FALSE if not</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>Determine if a particular table exists.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::list_fields"> -<code class="descname">list_fields</code><span class="sig-paren">(</span><em>$table</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::list_fields" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$table</strong> (<em>string</em>) – The table name</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of field names 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>Gets a list of the field names in a table.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::field_exists"> -<code class="descname">field_exists</code><span class="sig-paren">(</span><em>$field_name</em>, <em>$table_name</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::field_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>$table_name</strong> (<em>string</em>) – The table name</li> -<li><strong>$field_name</strong> (<em>string</em>) – The field 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 that field exists in that table, FALSE if not</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>Determine if a particular field exists.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::field_data"> -<code class="descname">field_data</code><span class="sig-paren">(</span><em>$table</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::field_data" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$table</strong> (<em>string</em>) – The table name</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of field data items 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>Gets a list containing field data about a table.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::escape_identifiers"> -<code class="descname">escape_identifiers</code><span class="sig-paren">(</span><em>$item</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::escape_identifiers" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$item</strong> (<em>mixed</em>) – The item or array of items to escape</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The input item(s), escaped</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>Escape SQL identifiers, such as column, table and names.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::insert_string"> -<code class="descname">insert_string</code><span class="sig-paren">(</span><em>$table</em>, <em>$data</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::insert_string" 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>$table</strong> (<em>string</em>) – The target table</li> -<li><strong>$data</strong> (<em>array</em>) – An associative array of key/value pairs</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The SQL INSERT 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>Generate an INSERT statement string.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::update_string"> -<code class="descname">update_string</code><span class="sig-paren">(</span><em>$table</em>, <em>$data</em>, <em>$where</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::update_string" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$table</strong> (<em>string</em>) – The target table</li> -<li><strong>$data</strong> (<em>array</em>) – An associative array of key/value pairs</li> -<li><strong>$where</strong> (<em>mixed</em>) – The WHERE statement conditions</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The SQL UPDATE 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>Generate an UPDATE statement string.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::call_function"> -<code class="descname">call_function</code><span class="sig-paren">(</span><em>$function</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::call_function" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$function</strong> (<em>string</em>) – Function name</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The function result</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>Runs a native PHP function , using a platform agnostic -wrapper.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::cache_set_path"> -<code class="descname">cache_set_path</code><span class="sig-paren">(</span><span class="optional">[</span><em>$path = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::cache_set_path" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$path</strong> (<em>string</em>) – Path to the cache directory</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">void</p> -</td> -</tr> -</tbody> -</table> -<p>Sets the directory path to use for caching storage.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::cache_on"> -<code class="descname">cache_on</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::cache_on" 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">TRUE if caching is on, FALSE if not</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">bool</td> -</tr> -</tbody> -</table> -<p>Enable database results caching.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::cache_off"> -<code class="descname">cache_off</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::cache_off" 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">TRUE if caching is on, FALSE if not</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">bool</td> -</tr> -</tbody> -</table> -<p>Disable database results caching.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::cache_delete"> -<code class="descname">cache_delete</code><span class="sig-paren">(</span><span class="optional">[</span><em>$segment_one = ''</em><span class="optional">[</span>, <em>$segment_two = ''</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::cache_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>$segment_one</strong> (<em>string</em>) – First URI segment</li> -<li><strong>$segment_two</strong> (<em>string</em>) – Second URI segment</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>Delete the cache files associated with a particular URI.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::cache_delete_all"> -<code class="descname">cache_delete_all</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::cache_delete_all" 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">TRUE on success, FALSE on failure</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">bool</td> -</tr> -</tbody> -</table> -<p>Delete all cache files.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::close"> -<code class="descname">close</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::close" 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">Return type:</th><td class="field-body">void</td> -</tr> -</tbody> -</table> -<p>Close the DB Connection.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::display_error"> -<code class="descname">display_error</code><span class="sig-paren">(</span><span class="optional">[</span><em>$error = ''</em><span class="optional">[</span>, <em>$swap = ''</em><span class="optional">[</span>, <em>$native = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::display_error" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$error</strong> (<em>string</em>) – The error message</li> -<li><strong>$swap</strong> (<em>string</em>) – Any “swap” values</li> -<li><strong>$native</strong> (<em>bool</em>) – Whether to localize the message</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">void</p> -</td> -</tr> -<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Displays the DB error screensends the application/views/errors/error_db.php template</p> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> -</td> -</tr> -</tbody> -</table> -<p>Display an error message and stop script execution.</p> -<p>The message is displayed using the -<em>application/views/errors/error_db.php</em> template.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_DB_driver::protect_identifiers"> -<code class="descname">protect_identifiers</code><span class="sig-paren">(</span><em>$item</em><span class="optional">[</span>, <em>$prefix_single = FALSE</em><span class="optional">[</span>, <em>$protect_identifiers = NULL</em><span class="optional">[</span>, <em>$field_exists = TRUE</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_driver::protect_identifiers" 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>$item</strong> (<em>string</em>) – The item to work with</li> -<li><strong>$prefix_single</strong> (<em>bool</em>) – Whether to apply the dbprefix even if the input item is a single identifier</li> -<li><strong>$protect_identifiers</strong> (<em>bool</em>) – Whether to quote identifiers</li> -<li><strong>$field_exists</strong> (<em>bool</em>) – Whether the supplied item contains a field name 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 modified item</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>Takes a column or table name (optionally with an alias) -and applies the configured <em>dbprefix</em> to it.</p> -<p>Some logic is necessary in order to deal with -column names that include the path.</p> -<p>Consider a query like this:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">SELECT</span> <span class="o">*</span> <span class="nx">FROM</span> <span class="nx">hostname</span><span class="o">.</span><span class="nx">database</span><span class="o">.</span><span class="nx">table</span><span class="o">.</span><span class="nx">column</span> <span class="k">AS</span> <span class="nx">c</span> <span class="nx">FROM</span> <span class="nx">hostname</span><span class="o">.</span><span class="nx">database</span><span class="o">.</span><span class="nx">table</span> -</pre></div> -</div> -<p>Or a query with aliasing:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">SELECT</span> <span class="nx">m</span><span class="o">.</span><span class="nx">member_id</span><span class="p">,</span> <span class="nx">m</span><span class="o">.</span><span class="nx">member_name</span> <span class="nx">FROM</span> <span class="nx">members</span> <span class="k">AS</span> <span class="nx">m</span> -</pre></div> -</div> -<p>Since the column name can include up to four segments -(host, DB, table, column) or also have an alias prefix, -we need to do a bit of work to figure this out and -insert the table prefix (if it exists) in the proper -position, and escape only the correct identifiers.</p> -<p>This method is used extensively by the Query Builder class.</p> -</dd></dl> - -</dd></dl> - -</div> - - - </div> - <footer> - - <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> - - <a href="../helpers/index.html" class="btn btn-neutral float-right" title="Helpers">Next <span class="fa fa-arrow-circle-right"></span></a> - - - <a href="utilities.html" class="btn btn-neutral" title="Database Utility Class"><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 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:'3.1.10', - COLLAPSE_INDEX:false, - FILE_SUFFIX:'.html', - 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