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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>51.5. pg_amproc</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="catalog-pg-amop.html" title="51.4. pg_amop" /><link rel="next" href="catalog-pg-attrdef.html" title="51.6. pg_attrdef" /><meta name="viewport" content="width=device-width,initial-scale=1.0" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="4" align="center"><a accesskey="h" href="index.html">PostgreSQL 12.4文書</a></th></tr><tr><td width="10%" align="left"></td><td width="10%" align="left"></td><td width="60%" align="center"><a href="catalogs.html" title="第51章 システムカタログ">第51章 システムカタログ</a></td><td width="20%" align="right"><div class="actions"><a class="issue" title="github" href="https://github.com/pgsql-jp/jpug-doc/issues/new?title=version 12.4 catalog-pg-amproc.html">誤訳等の報告
</a></div></td></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-amop.html" title="51.4. pg_amop">前へ</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="第51章 システムカタログ">上へ</a></td><td width="60%" align="center">51.5. <code class="structname">pg_amproc</code></td><td width="20%" align="right"> <a accesskey="n" href="catalog-pg-attrdef.html" title="51.6. pg_attrdef">次へ</a></td></tr></table><hr /></div><div class="sect1" id="CATALOG-PG-AMPROC"><div class="titlepage"><div><div><h2 class="title" style="clear: both">51.5. <code class="structname">pg_amproc</code></h2></div></div></div><a id="id-1.10.4.7.2" class="indexterm"></a><p>
<span class="original">
The catalog <structname>pg_amproc</structname> stores information about
support functions associated with access method operator families. There
is one row for each support function belonging to an operator family.
</span>
<code class="structname">pg_amproc</code>カタログには、アクセスメソッド演算子族に関連付けられたサポート関数の情報が格納されます。
演算子族に含まれるサポート関数毎に１つの行が存在します。
</p><div class="table" id="id-1.10.4.7.4"><p class="title"><strong>表51.5 <code class="structname">pg_amproc</code>の列</strong></p><div class="table-contents"><span class="original">
<title><structname>pg_amproc</structname> Columns</title>
</span><table class="table" summary="pg_amprocの列" border="1"><colgroup><col /><col /><col /><col /></colgroup><thead><tr><th>名前</th><th>型</th><th>参照先</th><th>説明</th></tr></thead><tbody><tr><td><code class="structfield">oid</code></td><td><code class="type">oid</code></td><td> </td><td>行識別子</td></tr><tr><td><code class="structfield">amprocfamily</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-opfamily.html" title="51.35. pg_opfamily"><code class="structname">pg_opfamily</code></a>.oid</code></td><td>この項目用の演算子族</td></tr><tr><td><code class="structfield">amproclefttype</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-type.html" title="51.63. pg_type"><code class="structname">pg_type</code></a>.oid</code></td><td>関連付けられた演算子の左辺のデータ型</td></tr><tr><td><code class="structfield">amprocrighttype</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-type.html" title="51.63. pg_type"><code class="structname">pg_type</code></a>.oid</code></td><td>関連付けられた演算子の右辺データ型</td></tr><tr><td><code class="structfield">amprocnum</code></td><td><code class="type">int2</code></td><td> </td><td>サポート関数番号</td></tr><tr><td><code class="structfield">amproc</code></td><td><code class="type">regproc</code></td><td><code class="literal"><a class="link" href="catalog-pg-proc.html" title="51.39. pg_proc"><code class="structname">pg_proc</code></a>.oid</code></td><td>プロシージャのOID</td></tr></tbody></table></div></div><br class="table-break" /><p>
<span class="original">
The usual interpretation of the
<structfield>amproclefttype</structfield> and <structfield>amprocrighttype</structfield> fields
is that they identify the left and right input types of the operator(s)
that a particular support function supports. For some access methods
these match the input data type(s) of the support function itself, for
others not. There is a notion of <quote>default</quote> support functions for
an index, which are those with <structfield>amproclefttype</structfield> and
<structfield>amprocrighttype</structfield> both equal to the index operator class's
<structfield>opcintype</structfield>.
</span>
<code class="structfield">amproclefttype</code>と<code class="structfield">amprocrighttype</code>属性の通常の解釈は、それらが、特定のサポート関数がサポートする演算子の左と右の入力型を識別することです。
いくつかのアクセスメソッドに対して、これらはサポート関数自身の入力データ型に一致することもあります。
また、そうでないものもあります。
インデックスに対して<span class="quote">「<span class="quote">デフォルト</span>」</span>サポート関数の概念があります。
これは<code class="structfield">amproclefttype</code>と<code class="structfield">amprocrighttype</code>の両方が、インデックス演算クラスの<code class="structfield">opcintype</code>に等しい、という概念です。
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-amop.html">前へ</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html">上へ</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-attrdef.html">次へ</a></td></tr><tr><td width="40%" align="left" valign="top">51.4. <code class="structname">pg_amop</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html">ホーム</a></td><td width="40%" align="right" valign="top"> 51.6. <code class="structname">pg_attrdef</code></td></tr></table></div></body></html>