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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 12:19:15 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 12:19:15 +0000
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tree657d8194422a5daccecfd42d654b8a245ef7b4c8 /doc/src/sgml/html/sql-dropaggregate.html
parentInitial commit. (diff)
downloadpostgresql-13-upstream.tar.xz
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Adding upstream version 13.4.upstream/13.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<!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 AGGREGATE</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-drop-access-method.html" title="DROP ACCESS METHOD" /><link rel="next" href="sql-dropcast.html" title="DROP CAST" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">DROP AGGREGATE</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-drop-access-method.html" title="DROP ACCESS METHOD">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 13.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-dropcast.html" title="DROP CAST">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="SQL-DROPAGGREGATE"><div class="titlepage"></div><a id="id-1.9.3.104.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">DROP AGGREGATE</span></h2><p>DROP AGGREGATE — remove an aggregate function</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
+DROP AGGREGATE [ IF EXISTS ] <em class="replaceable"><code>name</code></em> ( <em class="replaceable"><code>aggregate_signature</code></em> ) [, ...] [ CASCADE | RESTRICT ]
+
+<span class="phrase">where <em class="replaceable"><code>aggregate_signature</code></em> is:</span>
+
+* |
+[ <em class="replaceable"><code>argmode</code></em> ] [ <em class="replaceable"><code>argname</code></em> ] <em class="replaceable"><code>argtype</code></em> [ , ... ] |
+[ [ <em class="replaceable"><code>argmode</code></em> ] [ <em class="replaceable"><code>argname</code></em> ] <em class="replaceable"><code>argtype</code></em> [ , ... ] ] ORDER BY [ <em class="replaceable"><code>argmode</code></em> ] [ <em class="replaceable"><code>argname</code></em> ] <em class="replaceable"><code>argtype</code></em> [ , ... ]
+</pre></div><div class="refsect1" id="id-1.9.3.104.5"><h2>Description</h2><p>
+ <code class="command">DROP AGGREGATE</code> removes an existing
+ aggregate function. To execute this command the current
+ user must be the owner of the aggregate function.
+ </p></div><div class="refsect1" id="id-1.9.3.104.6"><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 aggregate 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 (optionally schema-qualified) of an existing aggregate function.
+ </p></dd><dt><span class="term"><em class="replaceable"><code>argmode</code></em></span></dt><dd><p>
+ The mode of an argument: <code class="literal">IN</code> or <code class="literal">VARIADIC</code>.
+ If omitted, the default is <code class="literal">IN</code>.
+ </p></dd><dt><span class="term"><em class="replaceable"><code>argname</code></em></span></dt><dd><p>
+ The name of an argument.
+ Note that <code class="command">DROP AGGREGATE</code> does not actually pay
+ any attention to argument names, since only the argument data
+ types are needed to determine the aggregate function's identity.
+ </p></dd><dt><span class="term"><em class="replaceable"><code>argtype</code></em></span></dt><dd><p>
+ An input data type on which the aggregate function operates.
+ To reference a zero-argument aggregate function, write <code class="literal">*</code>
+ in place of the list of argument specifications.
+ To reference an ordered-set aggregate function, write
+ <code class="literal">ORDER BY</code> between the direct and aggregated argument
+ specifications.
+ </p></dd><dt><span class="term"><code class="literal">CASCADE</code></span></dt><dd><p>
+ Automatically drop objects that depend on the aggregate function
+ (such as views using it),
+ 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 aggregate function if any objects depend on
+ it. This is the default.
+ </p></dd></dl></div></div><div class="refsect1" id="id-1.9.3.104.7"><h2>Notes</h2><p>
+ Alternative syntaxes for referencing ordered-set aggregates
+ are described under <a class="xref" href="sql-alteraggregate.html" title="ALTER AGGREGATE"><span class="refentrytitle">ALTER AGGREGATE</span></a>.
+ </p></div><div class="refsect1" id="id-1.9.3.104.8"><h2>Examples</h2><p>
+ To remove the aggregate function <code class="literal">myavg</code> for type
+ <code class="type">integer</code>:
+</p><pre class="programlisting">
+DROP AGGREGATE myavg(integer);
+</pre><p>
+ </p><p>
+ To remove the hypothetical-set aggregate function <code class="literal">myrank</code>,
+ which takes an arbitrary list of ordering columns and a matching list
+ of direct arguments:
+</p><pre class="programlisting">
+DROP AGGREGATE myrank(VARIADIC "any" ORDER BY VARIADIC "any");
+</pre><p>
+ </p><p>
+ To remove multiple aggregate functions in one command:
+</p><pre class="programlisting">
+DROP AGGREGATE myavg(integer), myavg(bigint);
+</pre></div><div class="refsect1" id="id-1.9.3.104.9"><h2>Compatibility</h2><p>
+ There is no <code class="command">DROP AGGREGATE</code> statement in the SQL
+ standard.
+ </p></div><div class="refsect1" id="id-1.9.3.104.10"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-alteraggregate.html" title="ALTER AGGREGATE"><span class="refentrytitle">ALTER AGGREGATE</span></a>, <a class="xref" href="sql-createaggregate.html" title="CREATE AGGREGATE"><span class="refentrytitle">CREATE AGGREGATE</span></a></span></div></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sql-drop-access-method.html" title="DROP ACCESS METHOD">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-dropcast.html" title="DROP CAST">Next</a></td></tr><tr><td width="40%" align="left" valign="top">DROP ACCESS METHOD </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> DROP CAST</td></tr></table></div></body></html> \ No newline at end of file
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