<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >ROLLBACK PREPARED</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 8.4.12 Documentation" HREF="index.html"><LINK REL="UP" TITLE="SQL Commands" HREF="sql-commands.html"><LINK REL="PREVIOUS" TITLE="ROLLBACK" HREF="sql-rollback.html"><LINK REL="NEXT" TITLE="ROLLBACK TO SAVEPOINT" HREF="sql-rollback-to.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2012-05-31T23:30:11"></HEAD ><BODY CLASS="REFENTRY" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" >PostgreSQL 8.4.12 Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="sql-rollback.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="sql-rollback.html" >Fast Backward</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="sql-rollback-to.html" >Fast Forward</A ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="sql-rollback-to.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SQL-ROLLBACK-PREPARED" ></A >ROLLBACK PREPARED</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN64691" ></A ><H2 >Name</H2 >ROLLBACK PREPARED -- cancel a transaction that was earlier prepared for two-phase commit</DIV ><A NAME="AEN64694" ></A ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN64696" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >ROLLBACK PREPARED <TT CLASS="REPLACEABLE" ><I >transaction_id</I ></TT ></PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN64699" ></A ><H2 >Description</H2 ><P > <TT CLASS="COMMAND" >ROLLBACK PREPARED</TT > rolls back a transaction that is in prepared state. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN64703" ></A ><H2 >Parameters</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="REPLACEABLE" ><I >transaction_id</I ></TT ></DT ><DD ><P > The transaction identifier of the transaction that is to be rolled back. </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN64711" ></A ><H2 >Notes</H2 ><P > To roll back a prepared transaction, you must be either the same user that executed the transaction originally, or a superuser. But you do not have to be in the same session that executed the transaction. </P ><P > This command cannot be executed inside a transaction block. The prepared transaction is rolled back immediately. </P ><P > All currently available prepared transactions are listed in the <A HREF="view-pg-prepared-xacts.html" ><TT CLASS="STRUCTNAME" >pg_prepared_xacts</TT ></A > system view. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="SQL-ROLLBACK-PREPARED-EXAMPLES" ></A ><H2 >Examples</H2 ><P > Roll back the transaction identified by the transaction identifier <TT CLASS="LITERAL" >foobar</TT >: </P><PRE CLASS="PROGRAMLISTING" >ROLLBACK PREPARED 'foobar';</PRE ><P> </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN64723" ></A ><H2 >See Also</H2 ><A HREF="sql-prepare-transaction.html" ><I >PREPARE TRANSACTION</I ></A >, <A HREF="sql-commit-prepared.html" ><I >COMMIT PREPARED</I ></A ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sql-rollback.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sql-rollback-to.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >ROLLBACK</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="sql-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >ROLLBACK TO SAVEPOINT</TD ></TR ></TABLE ></DIV ></BODY ></HTML >