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Green_GoodERP18_FSJ_Standard/PostgreSQL/doc/postgresql/html/sql-alteraggregate.html

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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>ALTER 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-abort.html" title="ABORT" /><link rel="next" href="sql-altercollation.html" title="ALTER COLLATION" /></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">ALTER AGGREGATE</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-abort.html" title="ABORT">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 12.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-altercollation.html" title="ALTER COLLATION">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="SQL-ALTERAGGREGATE"><div class="titlepage"></div><a id="id-1.9.3.4.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">ALTER AGGREGATE</span></h2><p>ALTER AGGREGATE — change the definition of an aggregate function</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">

  3. ALTER AGGREGATE <em class="replaceable"><code>name</code></em> ( <em class="replaceable"><code>aggregate_signature</code></em> ) RENAME TO <em class="replaceable"><code>new_name</code></em>

  4. ALTER AGGREGATE <em class="replaceable"><code>name</code></em> ( <em class="replaceable"><code>aggregate_signature</code></em> )

  5.                 OWNER TO { <em class="replaceable"><code>new_owner</code></em> | CURRENT_USER | SESSION_USER }

  6. ALTER AGGREGATE <em class="replaceable"><code>name</code></em> ( <em class="replaceable"><code>aggregate_signature</code></em> ) SET SCHEMA <em class="replaceable"><code>new_schema</code></em>

  7. 

  8. <span class="phrase">where <em class="replaceable"><code>aggregate_signature</code></em> is:</span>

  9. 

  10. * |

  11. [ <em class="replaceable"><code>argmode</code></em> ] [ <em class="replaceable"><code>argname</code></em> ] <em class="replaceable"><code>argtype</code></em> [ , ... ] |

  12. [ [ <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> [ , ... ]

  13. </pre></div><div class="refsect1" id="id-1.9.3.4.5"><h2>Description</h2><p>

  14.    <code class="command">ALTER AGGREGATE</code> changes the definition of an

  15.    aggregate function.

  16.   </p><p>

  17.    You must own the aggregate function to use <code class="command">ALTER AGGREGATE</code>.

  18.    To change the schema of an aggregate function, you must also have

  19.    <code class="literal">CREATE</code> privilege on the new schema.

  20.    To alter the owner, you must also be a direct or indirect member of the new

  21.    owning role, and that role must have <code class="literal">CREATE</code> privilege on

  22.    the aggregate function's schema.  (These restrictions enforce that altering

  23.    the owner doesn't do anything you couldn't do by dropping and recreating

  24.    the aggregate function.  However, a superuser can alter ownership of any

  25.    aggregate function anyway.)

  26.   </p></div><div class="refsect1" id="id-1.9.3.4.6"><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="replaceable"><code>name</code></em></span></dt><dd><p>

  27.       The name (optionally schema-qualified) of an existing aggregate function.

  28.      </p></dd><dt><span class="term"><em class="replaceable"><code>argmode</code></em></span></dt><dd><p>

  29.       The mode of an argument: <code class="literal">IN</code> or <code class="literal">VARIADIC</code>.

  30.       If omitted, the default is <code class="literal">IN</code>.

  31.      </p></dd><dt><span class="term"><em class="replaceable"><code>argname</code></em></span></dt><dd><p>

  32.       The name of an argument.

  33.       Note that <code class="command">ALTER AGGREGATE</code> does not actually pay

  34.       any attention to argument names, since only the argument data

  35.       types are needed to determine the aggregate function's identity.

  36.      </p></dd><dt><span class="term"><em class="replaceable"><code>argtype</code></em></span></dt><dd><p>

  37.       An input data type on which the aggregate function operates.

  38.       To reference a zero-argument aggregate function, write <code class="literal">*</code>

  39.       in place of the list of argument specifications.

  40.       To reference an ordered-set aggregate function, write

  41.       <code class="literal">ORDER BY</code> between the direct and aggregated argument

  42.       specifications.

  43.      </p></dd><dt><span class="term"><em class="replaceable"><code>new_name</code></em></span></dt><dd><p>

  44.       The new name of the aggregate function.

  45.      </p></dd><dt><span class="term"><em class="replaceable"><code>new_owner</code></em></span></dt><dd><p>

  46.       The new owner of the aggregate function.

  47.      </p></dd><dt><span class="term"><em class="replaceable"><code>new_schema</code></em></span></dt><dd><p>

  48.       The new schema for the aggregate function.

  49.      </p></dd></dl></div></div><div class="refsect1" id="id-1.9.3.4.7"><h2>Notes</h2><p>

  50.     The recommended syntax for referencing an ordered-set aggregate

  51.     is to write <code class="literal">ORDER BY</code> between the direct and aggregated

  52.     argument specifications, in the same style as in

  53.     <a class="xref" href="sql-createaggregate.html" title="CREATE AGGREGATE"><span class="refentrytitle">CREATE AGGREGATE</span></a>.  However, it will also work to

  54.     omit <code class="literal">ORDER BY</code> and just run the direct and aggregated

  55.     argument specifications into a single list.  In this abbreviated form,

  56.     if <code class="literal">VARIADIC "any"</code> was used in both the direct and

  57.     aggregated argument lists, write <code class="literal">VARIADIC "any"</code> only once.

  58.    </p></div><div class="refsect1" id="id-1.9.3.4.8"><h2>Examples</h2><p>

  59.    To rename the aggregate function <code class="literal">myavg</code> for type

  60.    <code class="type">integer</code> to <code class="literal">my_average</code>:

  61. </p><pre class="programlisting">

  62. ALTER AGGREGATE myavg(integer) RENAME TO my_average;

  63. </pre><p>

  64.   </p><p>

  65.    To change the owner of the aggregate function <code class="literal">myavg</code> for type

  66.    <code class="type">integer</code> to <code class="literal">joe</code>:

  67. </p><pre class="programlisting">

  68. ALTER AGGREGATE myavg(integer) OWNER TO joe;

  69. </pre><p>

  70.   </p><p>

  71.    To move the ordered-set aggregate <code class="literal">mypercentile</code> with

  72.    direct argument of type <code class="type">float8</code> and aggregated argument

  73.    of type <code class="type">integer</code> into schema <code class="literal">myschema</code>:

  74. </p><pre class="programlisting">

  75. ALTER AGGREGATE mypercentile(float8 ORDER BY integer) SET SCHEMA myschema;

  76. </pre><p>

  77.    This will work too:

  78. </p><pre class="programlisting">

  79. ALTER AGGREGATE mypercentile(float8, integer) SET SCHEMA myschema;

  80. </pre></div><div class="refsect1" id="id-1.9.3.4.9"><h2>Compatibility</h2><p>

  81.    There is no <code class="command">ALTER AGGREGATE</code> statement in the SQL

  82.    standard.

  83.   </p></div><div class="refsect1" id="id-1.9.3.4.10"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-createaggregate.html" title="CREATE AGGREGATE"><span class="refentrytitle">CREATE AGGREGATE</span></a>, <a class="xref" href="sql-dropaggregate.html" title="DROP AGGREGATE"><span class="refentrytitle">DROP AGGREGATE</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-abort.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-altercollation.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ABORT </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> ALTER COLLATION</td></tr></table></div></body></html>
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