Baoding-FenShuaJiang
/
Green_GoodERP18_FSJ_Standard
Watch 1
Star 0
Wiki 捐赠
gooderp18绿色标准版
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Tree: 0f75e31513
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '0f75e31513'
${ noResults }
Green_GoodERP18_FSJ_Standard/PostgreSQL/doc/postgresql/html/spgist-builtin-opclasses.html

99 lines
7.5KB
Raw Blame History 

  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>65.2. Built-in Operator Classes</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="spgist-intro.html" title="65.1. Introduction" /><link rel="next" href="spgist-extensibility.html" title="65.3. Extensibility" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">65.2. Built-in Operator Classes</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="spgist-intro.html" title="65.1. Introduction">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="spgist.html" title="Chapter 65. SP-GiST Indexes">Up</a></td><th width="60%" align="center">Chapter 65. SP-GiST Indexes</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 12.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="spgist-extensibility.html" title="65.3. Extensibility">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="SPGIST-BUILTIN-OPCLASSES"><div class="titlepage"><div><div><h2 class="title" style="clear: both">65.2. Built-in Operator Classes</h2></div></div></div><p>

  3.   The core <span class="productname">PostgreSQL</span> distribution

  4.   includes the <acronym class="acronym">SP-GiST</acronym> operator classes shown in

  5.   <a class="xref" href="spgist-builtin-opclasses.html#SPGIST-BUILTIN-OPCLASSES-TABLE" title="Table 65.1. Built-in SP-GiST Operator Classes">Table 65.1</a>.

  6.  </p><div class="table" id="SPGIST-BUILTIN-OPCLASSES-TABLE"><p class="title"><strong>Table 65.1. Built-in <acronym class="acronym">SP-GiST</acronym> Operator Classes</strong></p><div class="table-contents"><table class="table" summary="Built-in SP-GiST Operator Classes" border="1"><colgroup><col /><col /><col /><col /></colgroup><thead><tr><th>Name</th><th>Indexed Data Type</th><th>Indexable Operators</th><th>Ordering Operators</th></tr></thead><tbody><tr><td><code class="literal">kd_point_ops</code></td><td><code class="type">point</code></td><td>

  7.        <code class="literal">&lt;&lt;</code>

  8.        <code class="literal">&lt;@</code>

  9.        <code class="literal">&lt;^</code>

  10.        <code class="literal">&gt;&gt;</code>

  11.        <code class="literal">&gt;^</code>

  12.        <code class="literal">~=</code>

  13.       </td><td>

  14.        <code class="literal">&lt;-&gt;</code>

  15.       </td></tr><tr><td><code class="literal">quad_point_ops</code></td><td><code class="type">point</code></td><td>

  16.        <code class="literal">&lt;&lt;</code>

  17.        <code class="literal">&lt;@</code>

  18.        <code class="literal">&lt;^</code>

  19.        <code class="literal">&gt;&gt;</code>

  20.        <code class="literal">&gt;^</code>

  21.        <code class="literal">~=</code>

  22.       </td><td>

  23.        <code class="literal">&lt;-&gt;</code>

  24.       </td></tr><tr><td><code class="literal">range_ops</code></td><td>any range type</td><td>

  25.        <code class="literal">&amp;&amp;</code>

  26.        <code class="literal">&amp;&lt;</code>

  27.        <code class="literal">&amp;&gt;</code>

  28.        <code class="literal">-|-</code>

  29.        <code class="literal">&lt;&lt;</code>

  30.        <code class="literal">&lt;@</code>

  31.        <code class="literal">=</code>

  32.        <code class="literal">&gt;&gt;</code>

  33.        <code class="literal">@&gt;</code>

  34.       </td><td>

  35.       </td></tr><tr><td><code class="literal">box_ops</code></td><td><code class="type">box</code></td><td>

  36.        <code class="literal">&lt;&lt;</code>

  37.        <code class="literal">&amp;&lt;</code>

  38.        <code class="literal">&amp;&amp;</code>

  39.        <code class="literal">&amp;&gt;</code>

  40.        <code class="literal">&gt;&gt;</code>

  41.        <code class="literal">~=</code>

  42.        <code class="literal">@&gt;</code>

  43.        <code class="literal">&lt;@</code>

  44.        <code class="literal">&amp;&lt;|</code>

  45.        <code class="literal">&lt;&lt;|</code>

  46.        <code class="literal">|&gt;&gt;</code>

  47.        <code class="literal">|&amp;&gt;</code>

  48.       </td><td>

  49.       </td></tr><tr><td><code class="literal">poly_ops</code></td><td><code class="type">polygon</code></td><td>

  50.        <code class="literal">&lt;&lt;</code>

  51.        <code class="literal">&amp;&lt;</code>

  52.        <code class="literal">&amp;&amp;</code>

  53.        <code class="literal">&amp;&gt;</code>

  54.        <code class="literal">&gt;&gt;</code>

  55.        <code class="literal">~=</code>

  56.        <code class="literal">@&gt;</code>

  57.        <code class="literal">&lt;@</code>

  58.        <code class="literal">&amp;&lt;|</code>

  59.        <code class="literal">&lt;&lt;|</code>

  60.        <code class="literal">|&gt;&gt;</code>

  61.        <code class="literal">|&amp;&gt;</code>

  62.       </td><td>

  63.         <code class="literal">&lt;-&gt;</code>

  64.       </td></tr><tr><td><code class="literal">text_ops</code></td><td><code class="type">text</code></td><td>

  65.        <code class="literal">&lt;</code>

  66.        <code class="literal">&lt;=</code>

  67.        <code class="literal">=</code>

  68.        <code class="literal">&gt;</code>

  69.        <code class="literal">&gt;=</code>

  70.        <code class="literal">~&lt;=~</code>

  71.        <code class="literal">~&lt;~</code>

  72.        <code class="literal">~&gt;=~</code>

  73.        <code class="literal">~&gt;~</code>

  74.        <code class="literal">^@</code>

  75.       </td><td>

  76.       </td></tr><tr><td><code class="literal">inet_ops</code></td><td><code class="type">inet</code>, <code class="type">cidr</code></td><td>

  77.        <code class="literal">&amp;&amp;</code>

  78.        <code class="literal">&gt;&gt;</code>

  79.        <code class="literal">&gt;&gt;=</code>

  80.        <code class="literal">&gt;</code>

  81.        <code class="literal">&gt;=</code>

  82.        <code class="literal">&lt;&gt;</code>

  83.        <code class="literal">&lt;&lt;</code>

  84.        <code class="literal">&lt;&lt;=</code>

  85.        <code class="literal">&lt;</code>

  86.        <code class="literal">&lt;=</code>

  87.        <code class="literal">=</code>

  88.       </td><td>

  89.       </td></tr></tbody></table></div></div><br class="table-break" /><p>

  90.   Of the two operator classes for type <code class="type">point</code>,

  91.   <code class="literal">quad_point_ops</code> is the default.  <code class="literal">kd_point_ops</code>

  92.   supports the same operators but uses a different index data structure that

  93.   may offer better performance in some applications.

  94.  </p><p>

  95.   The <code class="literal">quad_point_ops</code>, <code class="literal">kd_point_ops</code> and

  96.   <code class="literal">poly_ops</code> operator classes support the <code class="literal">&lt;-&gt;</code>

  97.   ordering operator, which enables the k-nearest neighbor (<code class="literal">k-NN</code>)

  98.   search over indexed point or polygon data sets.

  99.  </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="spgist-intro.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="spgist.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="spgist-extensibility.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">65.1. Introduction </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 65.3. Extensibility</td></tr></table></div></body></html>
上海开阖软件有限公司 沪ICP备12045867号-1