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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>64.5. Index Uniqueness Checks</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="index-locking.html" title="64.4. Index Locking Considerations" /><link rel="next" href="index-cost-estimation.html" title="64.6. Index Cost Estimation Functions" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">64.5. Index Uniqueness Checks</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="index-locking.html" title="64.4. Index Locking Considerations">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="indexam.html" title="Chapter 64. Index Access Method Interface Definition">Up</a></td><th width="60%" align="center">Chapter 64. Index Access Method Interface Definition</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.6 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="index-cost-estimation.html" title="64.6. Index Cost Estimation Functions">Next</a></td></tr></table><hr /></div><div class="sect1" id="INDEX-UNIQUE-CHECKS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">64.5. Index Uniqueness Checks</h2></div></div></div><p>
+<!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>64.5. Index Uniqueness Checks</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="index-locking.html" title="64.4. Index Locking Considerations" /><link rel="next" href="index-cost-estimation.html" title="64.6. Index Cost Estimation Functions" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">64.5. Index Uniqueness Checks</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="index-locking.html" title="64.4. Index Locking Considerations">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="indexam.html" title="Chapter 64. Index Access Method Interface Definition">Up</a></td><th width="60%" align="center">Chapter 64. Index Access Method Interface Definition</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.7 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="index-cost-estimation.html" title="64.6. Index Cost Estimation Functions">Next</a></td></tr></table><hr /></div><div class="sect1" id="INDEX-UNIQUE-CHECKS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">64.5. Index Uniqueness Checks</h2></div></div></div><p>
    <span class="productname">PostgreSQL</span> enforces SQL uniqueness constraints
    using <em class="firstterm">unique indexes</em>, which are indexes that disallow
    multiple entries with identical keys.  An access method that supports this
@@ -106,4 +106,4 @@
        target row is found in the recheck verifies that we are scanning
        for the same tuple values as were used in the original insertion.
       </p></li></ul></div><p>
-  </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="index-locking.html" title="64.4. Index Locking Considerations">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="indexam.html" title="Chapter 64. Index Access Method Interface Definition">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="index-cost-estimation.html" title="64.6. Index Cost Estimation Functions">Next</a></td></tr><tr><td width="40%" align="left" valign="top">64.4. Index Locking Considerations </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.6 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 64.6. Index Cost Estimation Functions</td></tr></table></div></body></html>
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+  </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="index-locking.html" title="64.4. Index Locking Considerations">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="indexam.html" title="Chapter 64. Index Access Method Interface Definition">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="index-cost-estimation.html" title="64.6. Index Cost Estimation Functions">Next</a></td></tr><tr><td width="40%" align="left" valign="top">64.4. Index Locking Considerations </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.7 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 64.6. Index Cost Estimation Functions</td></tr></table></div></body></html>
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