begriffs open source - ai-pg/blob - full-docs/src/sgml/html/catalog-pg-rewrite.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>52.45. pg_rewrite</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="catalog-pg-replication-origin.html" title="52.44. pg_replication_origin" /><link rel="next" href="catalog-pg-seclabel.html" title="52.46. pg_seclabel" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">52.45. <code class="structname">pg_rewrite</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-replication-origin.html" title="52.44. pg_replication_origin">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="Chapter 52. System Catalogs">Up</a></td><th width="60%" align="center">Chapter 52. System Catalogs</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="catalog-pg-seclabel.html" title="52.46. pg_seclabel">Next</a></td></tr></table><hr /></div><div class="sect1" id="CATALOG-PG-REWRITE"><div class="titlepage"><div><div><h2 class="title" style="clear: both">52.45. <code class="structname">pg_rewrite</code> <a href="#CATALOG-PG-REWRITE" class="id_link">#</a></h2></div></div></div><a id="id-1.10.4.47.2" class="indexterm"></a><p>
   3    The catalog <code class="structname">pg_rewrite</code> stores rewrite rules for tables and views.
   4   </p><div class="table" id="id-1.10.4.47.4"><p class="title"><strong>Table 52.45. <code class="structname">pg_rewrite</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_rewrite Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
   5        Column Type
   6       </p>
   7       <p>
   8        Description
   9       </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
  10        <code class="structfield">oid</code> <code class="type">oid</code>
  11       </p>
  12       <p>
  13        Row identifier
  14       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  15        <code class="structfield">rulename</code> <code class="type">name</code>
  16       </p>
  17       <p>
  18        Rule name
  19       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  20        <code class="structfield">ev_class</code> <code class="type">oid</code>
  21        (references <a class="link" href="catalog-pg-class.html" title="52.11. pg_class"><code class="structname">pg_class</code></a>.<code class="structfield">oid</code>)
  22       </p>
  23       <p>
  24        The table this rule is for
  25       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  26        <code class="structfield">ev_type</code> <code class="type">char</code>
  27       </p>
  28       <p>
  29        Event type that the rule is for: 1 = <a class="xref" href="sql-select.html" title="SELECT"><span class="refentrytitle">SELECT</span></a>, 2 =
  30        <a class="xref" href="sql-update.html" title="UPDATE"><span class="refentrytitle">UPDATE</span></a>, 3 = <a class="xref" href="sql-insert.html" title="INSERT"><span class="refentrytitle">INSERT</span></a>, 4 =
  31        <a class="xref" href="sql-delete.html" title="DELETE"><span class="refentrytitle">DELETE</span></a>
  32       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  33        <code class="structfield">ev_enabled</code> <code class="type">char</code>
  34       </p>
  35       <p>
  36        Controls in which <a class="xref" href="runtime-config-client.html#GUC-SESSION-REPLICATION-ROLE">session_replication_role</a> modes
  37        the rule fires.
  38        <code class="literal">O</code> = rule fires in <span class="quote">“<span class="quote">origin</span>”</span> and <span class="quote">“<span class="quote">local</span>”</span> modes,
  39        <code class="literal">D</code> = rule is disabled,
  40        <code class="literal">R</code> = rule fires in <span class="quote">“<span class="quote">replica</span>”</span> mode,
  41        <code class="literal">A</code> = rule fires always.
  42       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  43        <code class="structfield">is_instead</code> <code class="type">bool</code>
  44       </p>
  45       <p>
  46        True if the rule is an <code class="literal">INSTEAD</code> rule
  47       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  48        <code class="structfield">ev_qual</code> <code class="type">pg_node_tree</code>
  49       </p>
  50       <p>
  51        Expression tree (in the form of a
  52        <code class="function">nodeToString()</code> representation) for the
  53        rule's qualifying condition
  54       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  55        <code class="structfield">ev_action</code> <code class="type">pg_node_tree</code>
  56       </p>
  57       <p>
  58        Query tree (in the form of a
  59        <code class="function">nodeToString()</code> representation) for the
  60        rule's action
  61       </p></td></tr></tbody></table></div></div><br class="table-break" /><div class="note"><h3 class="title">Note</h3><p>
  62     <code class="literal">pg_class.relhasrules</code>
  63     must be true if a table has any rules in this catalog.
  64    </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-replication-origin.html" title="52.44. pg_replication_origin">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 52. System Catalogs">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-seclabel.html" title="52.46. pg_seclabel">Next</a></td></tr><tr><td width="40%" align="left" valign="top">52.44. <code class="structname">pg_replication_origin</code> </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"> 52.46. <code class="structname">pg_seclabel</code></td></tr></table></div></body></html>