begriffs open source - ai-pg/blob - full-docs/html/catalog-pg-inherits.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>52.27. pg_inherits</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-index.html" title="52.26. pg_index" /><link rel="next" href="catalog-pg-init-privs.html" title="52.28. pg_init_privs" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">52.27. <code class="structname">pg_inherits</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-index.html" title="52.26. pg_index">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-init-privs.html" title="52.28. pg_init_privs">Next</a></td></tr></table><hr /></div><div class="sect1" id="CATALOG-PG-INHERITS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">52.27. <code class="structname">pg_inherits</code> <a href="#CATALOG-PG-INHERITS" class="id_link">#</a></h2></div></div></div><a id="id-1.10.4.29.2" class="indexterm"></a><p>
   3    The catalog <code class="structname">pg_inherits</code> records information about
   4    table and index inheritance hierarchies.  There is one entry for each direct
   5    parent-child table or index relationship in the database.  (Indirect
   6    inheritance can be determined by following chains of entries.)
   7   </p><div class="table" id="id-1.10.4.29.4"><p class="title"><strong>Table 52.27. <code class="structname">pg_inherits</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_inherits Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
   8        Column Type
   9       </p>
  10       <p>
  11        Description
  12       </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
  13        <code class="structfield">inhrelid</code> <code class="type">oid</code>
  14        (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>)
  15       </p>
  16       <p>
  17        The OID of the child table or index
  18       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  19        <code class="structfield">inhparent</code> <code class="type">oid</code>
  20        (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>)
  21       </p>
  22       <p>
  23        The OID of the parent table or index
  24       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  25        <code class="structfield">inhseqno</code> <code class="type">int4</code>
  26       </p>
  27       <p>
  28        If there is more than one direct parent for a child table (multiple
  29        inheritance), this number tells the order in which the
  30        inherited columns are to be arranged.  The count starts at 1.
  31       </p>
  32       <p>
  33        Indexes cannot have multiple inheritance, since they can only inherit
  34        when using declarative partitioning.
  35       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  36        <code class="structfield">inhdetachpending</code> <code class="type">bool</code>
  37       </p>
  38       <p>
  39        <code class="literal">true</code> for a partition that is in the process of
  40        being detached; <code class="literal">false</code> otherwise.
  41       </p></td></tr></tbody></table></div></div><br class="table-break" /></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-index.html" title="52.26. pg_index">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-init-privs.html" title="52.28. pg_init_privs">Next</a></td></tr><tr><td width="40%" align="left" valign="top">52.26. <code class="structname">pg_index</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"> 52.28. <code class="structname">pg_init_privs</code></td></tr></table></div></body></html>