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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>F.47. tsm_system_time — the SYSTEM_TIME sampling method for TABLESAMPLE</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="tsm-system-rows.html" title="F.46. tsm_system_rows — the SYSTEM_ROWS sampling method for TABLESAMPLE" /><link rel="next" href="unaccent.html" title="F.48. unaccent — a text search dictionary which removes diacritics" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">F.47. tsm_system_time —
- the <code class="literal">SYSTEM_TIME</code> sampling method for <code class="literal">TABLESAMPLE</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="tsm-system-rows.html" title="F.46. tsm_system_rows —&#10; the SYSTEM_ROWS sampling method for TABLESAMPLE">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="contrib.html" title="Appendix F. Additional Supplied Modules and Extensions">Up</a></td><th width="60%" align="center">Appendix F. Additional Supplied Modules and Extensions</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 16.2 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="unaccent.html" title="F.48. unaccent — a text search dictionary which removes diacritics">Next</a></td></tr></table><hr /></div><div class="sect1" id="TSM-SYSTEM-TIME"><div class="titlepage"><div><div><h2 class="title" style="clear: both">F.47. tsm_system_time —
+ the <code class="literal">SYSTEM_TIME</code> sampling method for <code class="literal">TABLESAMPLE</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="tsm-system-rows.html" title="F.46. tsm_system_rows —&#10; the SYSTEM_ROWS sampling method for TABLESAMPLE">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="contrib.html" title="Appendix F. Additional Supplied Modules and Extensions">Up</a></td><th width="60%" align="center">Appendix F. Additional Supplied Modules and Extensions</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="unaccent.html" title="F.48. unaccent — a text search dictionary which removes diacritics">Next</a></td></tr></table><hr /></div><div class="sect1" id="TSM-SYSTEM-TIME"><div class="titlepage"><div><div><h2 class="title" style="clear: both">F.47. tsm_system_time —
the <code class="literal">SYSTEM_TIME</code> sampling method for <code class="literal">TABLESAMPLE</code> <a href="#TSM-SYSTEM-TIME" class="id_link">#</a></h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="tsm-system-time.html#TSM-SYSTEM-TIME-EXAMPLES">F.47.1. Examples</a></span></dt></dl></div><a id="id-1.11.7.57.2" class="indexterm"></a><p>
The <code class="filename">tsm_system_time</code> module provides the table sampling method
<code class="literal">SYSTEM_TIME</code>, which can be used in
@@ -41,4 +41,4 @@ SELECT * FROM my_table TABLESAMPLE SYSTEM_TIME(1000);
it can read in 1 second (1000 milliseconds). Of course, if the whole
table can be read in under 1 second, all its rows will be returned.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="tsm-system-rows.html" title="F.46. tsm_system_rows —&#10; the SYSTEM_ROWS sampling method for TABLESAMPLE">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="contrib.html" title="Appendix F. Additional Supplied Modules and Extensions">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="unaccent.html" title="F.48. unaccent — a text search dictionary which removes diacritics">Next</a></td></tr><tr><td width="40%" align="left" valign="top">F.46. tsm_system_rows —
- the <code class="literal">SYSTEM_ROWS</code> sampling method for <code class="literal">TABLESAMPLE</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.2 Documentation">Home</a></td><td width="40%" align="right" valign="top"> F.48. unaccent — a text search dictionary which removes diacritics</td></tr></table></div></body></html> \ No newline at end of file
+ the <code class="literal">SYSTEM_ROWS</code> sampling method for <code class="literal">TABLESAMPLE</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="40%" align="right" valign="top"> F.48. unaccent — a text search dictionary which removes diacritics</td></tr></table></div></body></html> \ No newline at end of file