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  • Committer: Bazaar Package Importer
  • Author(s): Raphael Enrici, src/frm/frmBackup.cpp, debian/control
  • Date: 2006-10-06 21:06:48 UTC
  • mfrom: (1.1.3 upstream) (3 etch)
  • mto: This revision was merged to the branch mainline in revision 4.
  • Revision ID: james.westby@ubuntu.com-20061006210648-8ebo8o2zu28ydg0d
Tags: 1.4.3-2
* Patched frmBackup.cpp to ensure the schema is specified when backing up
  individual tables. (Closes: #387256)
  [src/frm/frmBackup.cpp]
* Cleaned up and updated description of the package. (Closes: #379188)
  [debian/control]

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<title>42.2.�pg_aggregate</title>
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<link rel="stylesheet" href="stylesheet.css" type="text/css">
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<link rev="made" href="pgsql-docs@postgresql.org">
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<meta name="generator" content="DocBook XSL Stylesheets V1.69.1">
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<link rel="start" href="index.html" title="PostgreSQL 8.1.3 Documentation">
 
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<meta name="generator" content="DocBook XSL Stylesheets V1.70.0">
 
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<link rel="start" href="index.html" title="PostgreSQL 8.1.4 Documentation">
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<link rel="up" href="catalogs.html" title="Chapter�42.�System Catalogs">
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<link rel="prev" href="catalogs.html" title="Chapter�42.�System Catalogs">
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<link rel="next" href="catalog-pg-am.html" title="42.3.�pg_am">
 
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<link rel="copyright" href="ln-legalnotice.html" title="Legal Notice">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="sect1" lang="en">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="catalog-pg-aggregate"></a>42.2.�<code class="structname">pg_aggregate</code></h2></div></div></div>
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<a name="id768772"></a><p>   The catalog <code class="structname">pg_aggregate</code> stores information about
 
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<a name="id820889"></a><p>   The catalog <code class="structname">pg_aggregate</code> stores information about
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   aggregate functions.  An aggregate function is a function that
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   operates on a set of values (typically one column from each row
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   that matches a query condition) and returns a single value computed
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   other information that is similar to ordinary functions.
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  </p>
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<div class="table">
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<a name="id768828"></a><p class="title"><b>Table�42.2.�<code class="structname">pg_aggregate</code> Columns</b></p>
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<table summary="pg_aggregate Columns" border="1">
 
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<a name="id820945"></a><p class="title"><b>Table�42.2.�<code class="structname">pg_aggregate</code> Columns</b></p>
 
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<div class="table-contents"><table summary="pg_aggregate Columns" border="1">
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<colgroup>
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<col>
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<col>
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      </td>
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</tr>
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</tbody>
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</table>
 
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</table></div>
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</div>
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<p>   New aggregate functions are registered with the <code class="command">CREATE
 
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<br class="table-break"><p>   New aggregate functions are registered with the <code class="command">CREATE
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   AGGREGATE</code> command.  See <a href="xaggr.html" title="32.10.�User-Defined Aggregates">Section�32.10, &#8220;User-Defined Aggregates&#8221;</a> for more
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   information about writing aggregate functions and the meaning of
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   the transition functions, etc.