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<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>DROP TRIGGER</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="sql-droptransform.html" title="DROP TRANSFORM" /><link rel="next" href="sql-droptype.html" title="DROP TYPE" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">DROP TRIGGER</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-droptransform.html" title="DROP TRANSFORM">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><th width="60%" align="center">SQL Commands</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 12.0 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-droptype.html" title="DROP TYPE">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="SQL-DROPTRIGGER"><div class="titlepage"></div><a id="id-1.9.3.141.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">DROP TRIGGER</span></h2><p>DROP TRIGGER — remove a trigger</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis"> DROP TRIGGER [ IF EXISTS ] <em class="replaceable"><code>name</code></em> ON <em class="replaceable"><code>table_name</code></em> [ CASCADE | RESTRICT ] </pre></div><div class="refsect1" id="id-1.9.3.141.5"><h2>Description</h2><p> <code class="command">DROP TRIGGER</code> removes an existing trigger definition. To execute this command, the current user must be the owner of the table for which the trigger is defined. </p></div><div class="refsect1" id="id-1.9.3.141.6"><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">IF EXISTS</code></span></dt><dd><p> Do not throw an error if the trigger does not exist. A notice is issued in this case. </p></dd><dt><span class="term"><em class="replaceable"><code>name</code></em></span></dt><dd><p> The name of the trigger to remove. </p></dd><dt><span class="term"><em class="replaceable"><code>table_name</code></em></span></dt><dd><p> The name (optionally schema-qualified) of the table for which the trigger is defined. </p></dd><dt><span class="term"><code class="literal">CASCADE</code></span></dt><dd><p> Automatically drop objects that depend on the trigger, and in turn all objects that depend on those objects (see <a class="xref" href="ddl-depend.html" title="5.14. Dependency Tracking">Section 5.14</a>). </p></dd><dt><span class="term"><code class="literal">RESTRICT</code></span></dt><dd><p> Refuse to drop the trigger if any objects depend on it. This is the default. </p></dd></dl></div></div><div class="refsect1" id="SQL-DROPTRIGGER-EXAMPLES"><h2>Examples</h2><p> Destroy the trigger <code class="literal">if_dist_exists</code> on the table <code class="literal">films</code>: </p><pre class="programlisting"> DROP TRIGGER if_dist_exists ON films; </pre></div><div class="refsect1" id="SQL-DROPTRIGGER-COMPATIBILITY"><h2>Compatibility</h2><p> The <code class="command">DROP TRIGGER</code> statement in <span class="productname">PostgreSQL</span> is incompatible with the SQL standard. In the SQL standard, trigger names are not local to tables, so the command is simply <code class="literal">DROP TRIGGER <em class="replaceable"><code>name</code></em></code>. </p></div><div class="refsect1" id="id-1.9.3.141.9"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-createtrigger.html" title="CREATE TRIGGER"><span class="refentrytitle">CREATE TRIGGER</span></a></span></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sql-droptransform.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-droptype.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">DROP TRANSFORM </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> DROP TYPE</td></tr></table></div></body></html>