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Lu, Huayi e6fa411af0 DWS DEV 830.201 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
2024-05-16 07:24:04 +00:00

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<a name="EN-US_TOPIC_0000001233681735"></a><a name="EN-US_TOPIC_0000001233681735"></a>
<h1 class="topictitle1">PG_INDEXES</h1>
<div id="body8662426"><p id="EN-US_TOPIC_0000001233681735__aa4db9405ba7e46fa9a4cf2528271022f"><strong id="EN-US_TOPIC_0000001233681735__b84235270617736">PG_INDEXES</strong> displays access to useful information about each index in the database.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001233681735__t49ee20e5c67545c3b6ce1c28bea267a4" frame="border" border="1" rules="all"><caption><b>Table 1 </b>PG_INDEXES columns</caption><thead align="left"><tr id="EN-US_TOPIC_0000001233681735__rb9723285c3eb4cfeac715308a6830402"><th align="left" class="cellrowborder" valign="top" width="15%" id="mcps1.3.2.2.5.1.1"><p id="EN-US_TOPIC_0000001233681735__a1e483c351f264bffa749309cacdd1f9b"><strong id="EN-US_TOPIC_0000001233681735__b84235270691445">Name</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="15%" id="mcps1.3.2.2.5.1.2"><p id="EN-US_TOPIC_0000001233681735__a18f9d7f4bb4e4810b54ad706c2882687">Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="20%" id="mcps1.3.2.2.5.1.3"><p id="EN-US_TOPIC_0000001233681735__a3be16434e8ed4b3faf5361a00e35c024">Reference</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.2.2.5.1.4"><p id="EN-US_TOPIC_0000001233681735__a098b7d3cc0dd46dbbff68e4f96ac0996">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001233681735__r7c5419a46a9d48aca1cd6eae4c18fcc8"><td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001233681735__aa3a93349f8dc40669d974dfe9ef9451d">schemaname</p>
</td>
<td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001233681735__ab02da9cf9b014a3f9fdb26271e6ac620">name</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001233681735__a3ac3cb67e20b475a8eac654682a45eb9"><a href="dws_04_0600.html">PG_NAMESPACE</a>.nspname</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001233681735__a773a445c8c3d473386308492728fea18">Name of the schema that contains tables and indexes</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001233681735__r3ee40f22201d4a57a54250c8418159a6"><td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001233681735__a323f71c894904539bdb9f2327ac21965">tablename</p>
</td>
<td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001233681735__ae9c62c9349c34fd08e5fa464fa23f862">name</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001233681735__a4600298f085440be9808f02eaa5bba8d"><a href="dws_04_0578.html">PG_CLASS</a>.relname</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001233681735__afc96470e0f134259813ff7e355718ef4">Name of the table for which the index serves</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001233681735__r66bfdb52f71041e589e7df4cde63f8ee"><td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001233681735__afbb46c844e354318a9aff5bd7c4eac21">indexname</p>
</td>
<td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001233681735__a5af73e0b0280473ea3bd0e131f555b56">name</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001233681735__a6eb3dda867a84566b4ae52a00dda18c3"><a href="dws_04_0578.html">PG_CLASS</a>.relname</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001233681735__a253fcc83bfe7450692f3e9b1bff13d7c">Index name</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001233681735__r9ee7e170680d47b2b32587aff15fbeb7"><td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001233681735__aae2a3499318941598be1f52489850ff2">tablespace</p>
</td>
<td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001233681735__a4420b4dcdaf24a7188dd0a6e04af48bf">name</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001233681735__a85df3083260449698d614fa814a89178"><a href="dws_04_0622.html">PG_TABLESPACE</a>.spcname</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001233681735__ae123561bb6f74c8bae800ee5fa4a0125">Name of the tablespace that contains the index</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001233681735__r325b156a71b64246afe4fa5bd89395a2"><td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001233681735__a30996abe5be3471bba23b13dab3a922c">indexdef</p>
</td>
<td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001233681735__aee39738c8ef64c20ad8583ec2ea80255">text</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001233681735__a1df8f936554440dea86c51c639b01233">-</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001233681735__a4841c14a699e46b1a6034c2599cce867">Index definition (a reconstructed <strong id="EN-US_TOPIC_0000001233681735__b17997121561119">CREATE INDEX</strong> command)</p>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="EN-US_TOPIC_0000001233681735__section41270276242"><h4 class="sectiontitle">Example</h4><p id="EN-US_TOPIC_0000001233681735__p15344431172410">Query the index information about a specified table.</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233681735__screen55234210312"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">pg_indexes</span><span class="w"> </span><span class="k">WHERE</span><span class="w"> </span><span class="n">tablename</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s1">'mytable'</span><span class="p">;</span>
<span class="w"> </span><span class="n">schemaname</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">tablename</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">indexname</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">tablespace</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">indexdef</span>
<span class="c1">------------+-----------+----------------+------------+-------------------------------------------------------------------------------</span>
<span class="w"> </span><span class="k">public</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">mytable</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">idx_mytable_id</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">CREATE</span><span class="w"> </span><span class="k">INDEX</span><span class="w"> </span><span class="n">idx_mytable_id</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="n">mytable</span><span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="n">btree</span><span class="w"> </span><span class="p">(</span><span class="n">id</span><span class="p">)</span><span class="w"> </span><span class="n">TABLESPACE</span><span class="w"> </span><span class="n">pg_default</span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
<p id="EN-US_TOPIC_0000001233681735__p18695131334119">Query information about indexes of all tables in a specified schema in the current database.</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233681735__screen1826125044215"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
<span class="normal"> 2</span>
<span class="normal"> 3</span>
<span class="normal"> 4</span>
<span class="normal"> 5</span>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">tablename</span><span class="p">,</span><span class="w"> </span><span class="n">indexname</span><span class="p">,</span><span class="w"> </span><span class="n">indexdef</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">pg_indexes</span><span class="w"> </span><span class="k">WHERE</span><span class="w"> </span><span class="n">schemaname</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s1">'public'</span><span class="w"> </span><span class="k">ORDER</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">tablename</span><span class="p">,</span><span class="n">indexname</span><span class="p">;</span>
<span class="w"> </span><span class="n">tablename</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">indexname</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">indexdef</span>
<span class="c1">-----------+--------------------+-----------------------------------------------------------------------------------------------------</span>
<span class="w"> </span><span class="n">books</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">books_pkey</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">CREATE</span><span class="w"> </span><span class="k">UNIQUE</span><span class="w"> </span><span class="k">INDEX</span><span class="w"> </span><span class="n">books_pkey</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="n">books</span><span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="n">btree</span><span class="w"> </span><span class="p">(</span><span class="n">id</span><span class="p">)</span><span class="w"> </span><span class="n">TABLESPACE</span><span class="w"> </span><span class="n">pg_default</span>
<span class="w"> </span><span class="n">books</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">idx_books_tags_gin</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">CREATE</span><span class="w"> </span><span class="k">INDEX</span><span class="w"> </span><span class="n">idx_books_tags_gin</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="n">books</span><span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="n">gin</span><span class="w"> </span><span class="p">(</span><span class="n">tags</span><span class="p">)</span><span class="w"> </span><span class="n">TABLESPACE</span><span class="w"> </span><span class="n">pg_default</span>
<span class="w"> </span><span class="n">customer</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">c_custkey_key</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">CREATE</span><span class="w"> </span><span class="k">UNIQUE</span><span class="w"> </span><span class="k">INDEX</span><span class="w"> </span><span class="n">c_custkey_key</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="n">customer</span><span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="n">btree</span><span class="w"> </span><span class="p">(</span><span class="n">c_custkey</span><span class="p">,</span><span class="w"> </span><span class="n">c_name</span><span class="p">)</span><span class="w"> </span><span class="n">TABLESPACE</span><span class="w"> </span><span class="n">pg_default</span>
<span class="w"> </span><span class="n">mytable</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">idx_mytable_id</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">CREATE</span><span class="w"> </span><span class="k">INDEX</span><span class="w"> </span><span class="n">idx_mytable_id</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="n">mytable</span><span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="n">btree</span><span class="w"> </span><span class="p">(</span><span class="n">id</span><span class="p">)</span><span class="w"> </span><span class="n">TABLESPACE</span><span class="w"> </span><span class="n">pg_default</span>
<span class="w"> </span><span class="n">test1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">idx_test_id</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">CREATE</span><span class="w"> </span><span class="k">INDEX</span><span class="w"> </span><span class="n">idx_test_id</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="n">test1</span><span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="n">btree</span><span class="w"> </span><span class="p">(</span><span class="n">id</span><span class="p">)</span><span class="w"> </span><span class="n">TABLESPACE</span><span class="w"> </span><span class="n">pg_default</span>
<span class="w"> </span><span class="n">v0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">v0_pkey</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">CREATE</span><span class="w"> </span><span class="k">UNIQUE</span><span class="w"> </span><span class="k">INDEX</span><span class="w"> </span><span class="n">v0_pkey</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="n">v0</span><span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="n">btree</span><span class="w"> </span><span class="p">(</span><span class="k">c</span><span class="p">)</span><span class="w"> </span><span class="n">TABLESPACE</span><span class="w"> </span><span class="n">pg_default</span>
<span class="p">(</span><span class="mi">6</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_04_0639.html">System Views</a></div>
</div>
</div>
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