begriffs open source - ai-pg/blob - full-docs/src/sgml/html/sql-alterstatistics.html

   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 STATISTICS</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-alterserver.html" title="ALTER SERVER" /><link rel="next" href="sql-altersubscription.html" title="ALTER SUBSCRIPTION" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">ALTER STATISTICS</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-alterserver.html" title="ALTER SERVER">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-altersubscription.html" title="ALTER SUBSCRIPTION">Next</a></td></tr></table><hr /></div><div class="refentry" id="SQL-ALTERSTATISTICS"><div class="titlepage"></div><a id="id-1.9.3.32.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">ALTER STATISTICS</span></h2><p>ALTER STATISTICS —
   3    change the definition of an extended statistics object
   4   </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
   5 ALTER STATISTICS <em class="replaceable"><code>name</code></em> OWNER TO { <em class="replaceable"><code>new_owner</code></em> | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
   6 ALTER STATISTICS <em class="replaceable"><code>name</code></em> RENAME TO <em class="replaceable"><code>new_name</code></em>
   7 ALTER STATISTICS <em class="replaceable"><code>name</code></em> SET SCHEMA <em class="replaceable"><code>new_schema</code></em>
   8 ALTER STATISTICS <em class="replaceable"><code>name</code></em> SET STATISTICS { <em class="replaceable"><code>new_target</code></em> | DEFAULT }
   9 </pre></div><div class="refsect1" id="id-1.9.3.32.5"><h2>Description</h2><p>
  10    <code class="command">ALTER STATISTICS</code> changes the parameters of an existing
  11    extended statistics object.  Any parameters not specifically set in the
  12    <code class="command">ALTER STATISTICS</code> command retain their prior settings.
  13   </p><p>
  14    You must own the statistics object to use <code class="command">ALTER STATISTICS</code>.
  15    To change a statistics object's schema, you must also
  16    have <code class="literal">CREATE</code> privilege on the new schema.
  17    To alter the owner, you must be able to <code class="literal">SET ROLE</code> to the
  18    new owning role, and that role must have <code class="literal">CREATE</code>
  19    privilege on the statistics object's schema.
  20    (These restrictions enforce that altering
  21    the owner doesn't do anything you couldn't do by dropping and recreating
  22    the statistics object.  However, a superuser can alter ownership of any
  23    statistics object anyway.)
  24   </p></div><div class="refsect1" id="id-1.9.3.32.6"><h2>Parameters</h2><p>
  25     </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="replaceable"><code>name</code></em></span></dt><dd><p>
  26         The name (optionally schema-qualified) of the statistics object to be
  27         altered.
  28        </p></dd><dt><span class="term"><em class="replaceable"><code>new_owner</code></em></span></dt><dd><p>
  29         The user name of the new owner of the statistics object.
  30        </p></dd><dt><span class="term"><em class="replaceable"><code>new_name</code></em></span></dt><dd><p>
  31         The new name for the statistics object.
  32        </p></dd><dt><span class="term"><em class="replaceable"><code>new_schema</code></em></span></dt><dd><p>
  33         The new schema for the statistics object.
  34        </p></dd><dt><span class="term"><em class="replaceable"><code>new_target</code></em></span></dt><dd><p>
  35         The statistic-gathering target for this statistics object for subsequent
  36         <a class="link" href="sql-analyze.html" title="ANALYZE"><code class="command">ANALYZE</code></a> operations.
  37         The target can be set in the range 0 to 10000.  Set it to
  38         <code class="literal">DEFAULT</code> to revert to using the system default
  39         statistics target (<a class="xref" href="runtime-config-query.html#GUC-DEFAULT-STATISTICS-TARGET">default_statistics_target</a>).
  40         (Setting to a value of -1 is an obsolete way spelling to get the same
  41         outcome.)
  42         For more information on the use of statistics by the
  43         <span class="productname">PostgreSQL</span> query planner, refer to
  44         <a class="xref" href="planner-stats.html" title="14.2. Statistics Used by the Planner">Section 14.2</a>.
  45        </p></dd></dl></div><p>
  46    </p></div><div class="refsect1" id="id-1.9.3.32.7"><h2>Compatibility</h2><p>
  47    There is no <code class="command">ALTER STATISTICS</code> command in the SQL standard.
  48   </p></div><div class="refsect1" id="id-1.9.3.32.8"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-createstatistics.html" title="CREATE STATISTICS"><span class="refentrytitle">CREATE STATISTICS</span></a>, <a class="xref" href="sql-dropstatistics.html" title="DROP STATISTICS"><span class="refentrytitle">DROP STATISTICS</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-alterserver.html" title="ALTER SERVER">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-altersubscription.html" title="ALTER SUBSCRIPTION">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ALTER SERVER </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"> ALTER SUBSCRIPTION</td></tr></table></div></body></html>