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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 12:15:05 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 12:15:05 +0000
commit46651ce6fe013220ed397add242004d764fc0153 (patch)
tree6e5299f990f88e60174a1d3ae6e48eedd2688b2b /doc/src/sgml/html/view-pg-prepared-xacts.html
parentInitial commit. (diff)
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Adding upstream version 14.5.upstream/14.5upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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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>52.78. pg_prepared_xacts</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="view-pg-prepared-statements.html" title="52.77. pg_prepared_statements" /><link rel="next" href="view-pg-publication-tables.html" title="52.79. pg_publication_tables" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">52.78. <code xmlns="http://www.w3.org/1999/xhtml" class="structname">pg_prepared_xacts</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="view-pg-prepared-statements.html" title="52.77. pg_prepared_statements">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="Chapter 52. System Catalogs">Up</a></td><th width="60%" align="center">Chapter 52. System Catalogs</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 14.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="view-pg-publication-tables.html" title="52.79. pg_publication_tables">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="VIEW-PG-PREPARED-XACTS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">52.78. <code class="structname">pg_prepared_xacts</code></h2></div></div></div><a id="id-1.10.4.80.2" class="indexterm"></a><p>
+ The view <code class="structname">pg_prepared_xacts</code> displays
+ information about transactions that are currently prepared for two-phase
+ commit (see <a class="xref" href="sql-prepare-transaction.html" title="PREPARE TRANSACTION"><span class="refentrytitle">PREPARE TRANSACTION</span></a> for details).
+ </p><p>
+ <code class="structname">pg_prepared_xacts</code> contains one row per prepared
+ transaction. An entry is removed when the transaction is committed or
+ rolled back.
+ </p><div class="table" id="id-1.10.4.80.5"><p class="title"><strong>Table 52.79. <code class="structname">pg_prepared_xacts</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_prepared_xacts Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
+ Column Type
+ </p>
+ <p>
+ Description
+ </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">transaction</code> <code class="type">xid</code>
+ </p>
+ <p>
+ Numeric transaction identifier of the prepared transaction
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">gid</code> <code class="type">text</code>
+ </p>
+ <p>
+ Global transaction identifier that was assigned to the transaction
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">prepared</code> <code class="type">timestamptz</code>
+ </p>
+ <p>
+ Time at which the transaction was prepared for commit
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">owner</code> <code class="type">name</code>
+ (references <a class="link" href="catalog-pg-authid.html" title="52.8. pg_authid"><code class="structname">pg_authid</code></a>.<code class="structfield">rolname</code>)
+ </p>
+ <p>
+ Name of the user that executed the transaction
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">database</code> <code class="type">name</code>
+ (references <a class="link" href="catalog-pg-database.html" title="52.15. pg_database"><code class="structname">pg_database</code></a>.<code class="structfield">datname</code>)
+ </p>
+ <p>
+ Name of the database in which the transaction was executed
+ </p></td></tr></tbody></table></div></div><br class="table-break" /><p>
+ When the <code class="structname">pg_prepared_xacts</code> view is accessed, the
+ internal transaction manager data structures are momentarily locked, and
+ a copy is made for the view to display. This ensures that the
+ view produces a consistent set of results, while not blocking
+ normal operations longer than necessary. Nonetheless
+ there could be some impact on database performance if this view is
+ frequently accessed.
+ </p></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="view-pg-prepared-statements.html" title="52.77. pg_prepared_statements">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 52. System Catalogs">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="view-pg-publication-tables.html" title="52.79. pg_publication_tables">Next</a></td></tr><tr><td width="40%" align="left" valign="top">52.77. <code xmlns="http://www.w3.org/1999/xhtml" class="structname">pg_prepared_statements</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 14.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 52.79. <code xmlns="http://www.w3.org/1999/xhtml" class="structname">pg_publication_tables</code></td></tr></table></div></body></html> \ No newline at end of file
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