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   1 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
   2 <!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 ROUTINE</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 Vsnapshot" /><link rel="prev" href="sql-droprole.html" title="DROP ROLE" /><link rel="next" href="sql-droprule.html" title="DROP RULE" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">DROP ROUTINE</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-droprole.html" title="DROP ROLE">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 18.0 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-droprule.html" title="DROP RULE">Next</a></td></tr></table><hr /></div><div class="refentry" id="SQL-DROPROUTINE"><div class="titlepage"></div><a id="id-1.9.3.127.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">DROP ROUTINE</span></h2><p>DROP ROUTINE — remove a routine</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
   3 DROP ROUTINE [ IF EXISTS ] <em class="replaceable"><code>name</code></em> [ ( [ [ <em class="replaceable"><code>argmode</code></em> ] [ <em class="replaceable"><code>argname</code></em> ] <em class="replaceable"><code>argtype</code></em> [, ...] ] ) ] [, ...]
   4     [ CASCADE | RESTRICT ]
   5 </pre></div><div class="refsect1" id="id-1.9.3.127.5"><h2>Description</h2><p>
   6    <code class="command">DROP ROUTINE</code> removes the definition of one or more
   7    existing routines.  The term <span class="quote">“<span class="quote">routine</span>”</span> includes
   8    aggregate functions, normal functions, and procedures.  See
   9    under <a class="xref" href="sql-dropaggregate.html" title="DROP AGGREGATE"><span class="refentrytitle">DROP AGGREGATE</span></a>, <a class="xref" href="sql-dropfunction.html" title="DROP FUNCTION"><span class="refentrytitle">DROP FUNCTION</span></a>,
  10    and <a class="xref" href="sql-dropprocedure.html" title="DROP PROCEDURE"><span class="refentrytitle">DROP PROCEDURE</span></a> for the description of the
  11    parameters, more examples, and further details.
  12   </p></div><div class="refsect1" id="SQL-DROPROUTINE-NOTES"><h2>Notes</h2><p>
  13    The lookup rules used by <code class="command">DROP ROUTINE</code> are
  14    fundamentally the same as for <code class="command">DROP PROCEDURE</code>; in
  15    particular, <code class="command">DROP ROUTINE</code> shares that command's
  16    behavior of considering an argument list that has
  17    no <em class="replaceable"><code>argmode</code></em> markers to be
  18    possibly using the SQL standard's definition that <code class="literal">OUT</code>
  19    arguments are included in the list.  (<code class="command">DROP AGGREGATE</code>
  20    and <code class="command">DROP FUNCTION</code> do not do that.)
  21   </p><p>
  22    In some cases where the same name is shared by routines of different
  23    kinds, it is possible for <code class="command">DROP ROUTINE</code> to fail with
  24    an ambiguity error when a more specific command (<code class="command">DROP
  25    FUNCTION</code>, etc.) would work.  Specifying the argument type
  26    list more carefully will also resolve such problems.
  27   </p><p>
  28    These lookup rules are also used by other commands that
  29    act on existing routines, such as <code class="command">ALTER ROUTINE</code>
  30    and <code class="command">COMMENT ON ROUTINE</code>.
  31   </p></div><div class="refsect1" id="SQL-DROPROUTINE-EXAMPLES"><h2>Examples</h2><p>
  32    To drop the routine <code class="literal">foo</code> for type
  33    <code class="type">integer</code>:
  34 </p><pre class="programlisting">
  35 DROP ROUTINE foo(integer);
  36 </pre><p>
  37    This command will work independent of whether <code class="literal">foo</code> is an
  38    aggregate, function, or procedure.
  39   </p></div><div class="refsect1" id="SQL-DROPROUTINE-COMPATIBILITY"><h2>Compatibility</h2><p>
  40    This command conforms to the SQL standard, with
  41    these <span class="productname">PostgreSQL</span> extensions:
  42    </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>The standard only allows one routine to be dropped per command.</p></li><li class="listitem"><p>The <code class="literal">IF EXISTS</code> option is an extension.</p></li><li class="listitem"><p>The ability to specify argument modes and names is an
  43      extension, and the lookup rules differ when modes are given.</p></li><li class="listitem"><p>User-definable aggregate functions are an extension.</p></li></ul></div></div><div class="refsect1" id="id-1.9.3.127.9"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-dropaggregate.html" title="DROP AGGREGATE"><span class="refentrytitle">DROP AGGREGATE</span></a>, <a class="xref" href="sql-dropfunction.html" title="DROP FUNCTION"><span class="refentrytitle">DROP FUNCTION</span></a>, <a class="xref" href="sql-dropprocedure.html" title="DROP PROCEDURE"><span class="refentrytitle">DROP PROCEDURE</span></a>, <a class="xref" href="sql-alterroutine.html" title="ALTER ROUTINE"><span class="refentrytitle">ALTER ROUTINE</span></a></span><p>
  44    Note that there is no <code class="literal">CREATE ROUTINE</code> command.
  45   </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sql-droprole.html" title="DROP ROLE">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-droprule.html" title="DROP RULE">Next</a></td></tr><tr><td width="40%" align="left" valign="top">DROP ROLE </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="40%" align="right" valign="top"> DROP RULE</td></tr></table></div></body></html>