Adding upstream version 15.5.upstream/15.5

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-05-04 12:17:33 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-05-04 12:17:33 +0000
commit: 5e45211a64149b3c659b90ff2de6fa982a5a93ed (patch)
tree: 739caf8c461053357daa9f162bef34516c7bf452 /doc/src/sgml/html/catalog-pg-opclass.html
parent: Initial commit. (diff)
download: postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.tar.xz
postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.zip
1 files changed, 75 insertions, 0 deletions
diff --git a/doc/src/sgml/html/catalog-pg-opclass.html b/doc/src/sgml/html/catalog-pg-opclass.html
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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!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>53.33. pg_opclass</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-namespace.html" title="53.32. pg_namespace" /><link rel="next" href="catalog-pg-operator.html" title="53.34. pg_operator" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">53.33. <code class="structname">pg_opclass</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-namespace.html" title="53.32. pg_namespace">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><th width="60%" align="center">Chapter 53. System Catalogs</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="catalog-pg-operator.html" title="53.34. pg_operator">Next</a></td></tr></table><hr /></div><div class="sect1" id="CATALOG-PG-OPCLASS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">53.33. <code class="structname">pg_opclass</code></h2></div></div></div><a id="id-1.10.4.35.2" class="indexterm"></a><p>
+   The catalog <code class="structname">pg_opclass</code> defines
+   index access method operator classes.  Each operator class defines
+   semantics for index columns of a particular data type and a particular
+   index access method.  An operator class essentially specifies that a
+   particular operator family is applicable to a particular indexable column
+   data type.  The set of operators from the family that are actually usable
+   with the indexed column are whichever ones accept the column's data type
+   as their left-hand input.
+  </p><p>
+   Operator classes are described at length in <a class="xref" href="xindex.html" title="38.16. Interfacing Extensions to Indexes">Section 38.16</a>.
+  </p><div class="table" id="id-1.10.4.35.5"><p class="title"><strong>Table 53.33. <code class="structname">pg_opclass</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_opclass Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
+       Column Type
+      </p>
+      <p>
+       Description
+      </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
+       <code class="structfield">oid</code> <code class="type">oid</code>
+      </p>
+      <p>
+       Row identifier
+      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+       <code class="structfield">opcmethod</code> <code class="type">oid</code>
+       (references <a class="link" href="catalog-pg-am.html" title="53.3. pg_am"><code class="structname">pg_am</code></a>.<code class="structfield">oid</code>)
+      </p>
+      <p>
+       Index access method operator class is for
+      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+       <code class="structfield">opcname</code> <code class="type">name</code>
+      </p>
+      <p>
+       Name of this operator class
+      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+       <code class="structfield">opcnamespace</code> <code class="type">oid</code>
+       (references <a class="link" href="catalog-pg-namespace.html" title="53.32. pg_namespace"><code class="structname">pg_namespace</code></a>.<code class="structfield">oid</code>)
+      </p>
+      <p>
+       Namespace of this operator class
+      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+       <code class="structfield">opcowner</code> <code class="type">oid</code>
+       (references <a class="link" href="catalog-pg-authid.html" title="53.8. pg_authid"><code class="structname">pg_authid</code></a>.<code class="structfield">oid</code>)
+      </p>
+      <p>
+       Owner of the operator class
+      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+       <code class="structfield">opcfamily</code> <code class="type">oid</code>
+       (references <a class="link" href="catalog-pg-opfamily.html" title="53.35. pg_opfamily"><code class="structname">pg_opfamily</code></a>.<code class="structfield">oid</code>)
+      </p>
+      <p>
+       Operator family containing the operator class
+      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+       <code class="structfield">opcintype</code> <code class="type">oid</code>
+       (references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
+      </p>
+      <p>
+       Data type that the operator class indexes
+      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+       <code class="structfield">opcdefault</code> <code class="type">bool</code>
+      </p>
+      <p>
+       True if this operator class is the default for <code class="structfield">opcintype</code>
+      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+       <code class="structfield">opckeytype</code> <code class="type">oid</code>
+       (references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
+      </p>
+      <p>
+       Type of data stored in index, or zero if same as <code class="structfield">opcintype</code>
+      </p></td></tr></tbody></table></div></div><br class="table-break" /><p>
+   An operator class's <code class="structfield">opcmethod</code> must match the
+   <code class="structfield">opfmethod</code> of its containing operator family.
+   Also, there must be no more than one <code class="structname">pg_opclass</code>
+   row having <code class="structfield">opcdefault</code> true for any given combination of
+   <code class="structfield">opcmethod</code> and <code class="structfield">opcintype</code>.
+  </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-namespace.html" title="53.32. pg_namespace">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-operator.html" title="53.34. pg_operator">Next</a></td></tr><tr><td width="40%" align="left" valign="top">53.32. <code class="structname">pg_namespace</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 53.34. <code class="structname">pg_operator</code></td></tr></table></div></body></html>
+\ No newline at end of file
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-05-04 12:17:33 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-05-04 12:17:33 +0000
commit	5e45211a64149b3c659b90ff2de6fa982a5a93ed (patch)
tree	739caf8c461053357daa9f162bef34516c7bf452 /doc/src/sgml/html/catalog-pg-opclass.html
parent	Initial commit. (diff)
download	postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.tar.xz postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.zip