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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-21 05:05:26 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-21 05:05:26 +0000 |
| commit | e75d99818dd3940be997520e64db8c9e3b207e39 (patch) | |
| tree | 0003ca0de74fcc8d18433e34ea68d2e7aaf06b7c /doc/src/sgml/html/how-parallel-query-works.html | |
| parent | Releasing progress-linux version 15.6-0+deb12u1~progress6.99u1. (diff) | |
| download | postgresql-15-e75d99818dd3940be997520e64db8c9e3b207e39.tar.xz postgresql-15-e75d99818dd3940be997520e64db8c9e3b207e39.zip | |
Merging upstream version 15.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'doc/src/sgml/html/how-parallel-query-works.html')
| -rw-r--r-- | doc/src/sgml/html/how-parallel-query-works.html | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/src/sgml/html/how-parallel-query-works.html b/doc/src/sgml/html/how-parallel-query-works.html index 740aa11..18cab3a 100644 --- a/doc/src/sgml/html/how-parallel-query-works.html +++ b/doc/src/sgml/html/how-parallel-query-works.html @@ -1,5 +1,5 @@ <?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>15.1. How Parallel Query Works</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="parallel-query.html" title="Chapter 15. Parallel Query" /><link rel="next" href="when-can-parallel-query-be-used.html" title="15.2. When Can Parallel Query Be Used?" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">15.1. How Parallel Query Works</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="parallel-query.html" title="Chapter 15. Parallel Query">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="parallel-query.html" title="Chapter 15. Parallel Query">Up</a></td><th width="60%" align="center">Chapter 15. Parallel Query</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="when-can-parallel-query-be-used.html" title="15.2. When Can Parallel Query Be Used?">Next</a></td></tr></table><hr /></div><div class="sect1" id="HOW-PARALLEL-QUERY-WORKS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">15.1. How Parallel Query Works</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>15.1. How Parallel Query Works</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="parallel-query.html" title="Chapter 15. Parallel Query" /><link rel="next" href="when-can-parallel-query-be-used.html" title="15.2. When Can Parallel Query Be Used?" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">15.1. How Parallel Query Works</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="parallel-query.html" title="Chapter 15. Parallel Query">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="parallel-query.html" title="Chapter 15. Parallel Query">Up</a></td><th width="60%" align="center">Chapter 15. Parallel Query</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="when-can-parallel-query-be-used.html" title="15.2. When Can Parallel Query Be Used?">Next</a></td></tr></table><hr /></div><div class="sect1" id="HOW-PARALLEL-QUERY-WORKS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">15.1. How Parallel Query Works</h2></div></div></div><p> When the optimizer determines that parallel query is the fastest execution strategy for a particular query, it will create a query plan that includes a <em class="firstterm">Gather</em> or <em class="firstterm">Gather Merge</em> @@ -68,4 +68,4 @@ EXPLAIN SELECT * FROM pgbench_accounts WHERE filler LIKE '%x%'; order-preserving merge. In contrast, <code class="literal">Gather</code> reads tuples from the workers in whatever order is convenient, destroying any sort order that may have existed. - </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="parallel-query.html" title="Chapter 15. Parallel Query">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="parallel-query.html" title="Chapter 15. Parallel Query">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="when-can-parallel-query-be-used.html" title="15.2. When Can Parallel Query Be Used?">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 15. Parallel Query </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"> 15.2. When Can Parallel Query Be Used?</td></tr></table></div></body></html>
\ No newline at end of file + </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="parallel-query.html" title="Chapter 15. Parallel Query">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="parallel-query.html" title="Chapter 15. Parallel Query">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="when-can-parallel-query-be-used.html" title="15.2. When Can Parallel Query Be Used?">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 15. Parallel Query </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"> 15.2. When Can Parallel Query Be Used?</td></tr></table></div></body></html>
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