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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/start_transaction.sgml,v 1.4 2003/01/10 22:03:27 petere Exp $
PostgreSQL documentation
-->
<refentry id="SQL-START-TRANSACTION">
<docinfo>
<date>2002-07-26</date>
</docinfo>
<refmeta>
<refentrytitle id="SQL-START-TRANSACTION-TITLE">START TRANSACTION</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>START TRANSACTION</refname>
<refpurpose>start a transaction block</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
START TRANSACTION [ ISOLATION LEVEL { READ COMMITTED | SERIALIZABLE } ] [ READ WRITE | READ ONLY ]
</synopsis>
<refsect2 id="R2-SQL-START-TRANSACTION-1">
<refsect2info>
<date>1998-09-27</date>
</refsect2info>
<title>
Inputs
</title>
<para>
None.
</para>
</refsect2>
<refsect2 id="R2-SQL-START-TRANSACTION-2">
<refsect2info>
<date>1998-09-27</date>
</refsect2info>
<title>
Outputs
</title>
<para>
<variablelist>
<varlistentry>
<term><computeroutput>
START TRANSACTION
</computeroutput></term>
<listitem>
<para>
Message returned if successful.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><computeroutput>
WARNING: BEGIN: already a transaction in progress
</computeroutput></term>
<listitem>
<para>
If there is already a transaction in progress when the
command is issued.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
This command begins a new transaction. If the isolation level or
read/write mode is specified, the new transaction has those
characteristics, as if <xref linkend="sql-set-transaction"
endterm="sql-set-transaction-title"> was executed. In all other
respects, the behavior of this command is identical to the <xref
linkend="sql-begin" endterm="sql-begin-title"> command.
</para>
</refsect1>
<refsect1 id="R1-SQL-START-TRANSACTION-3">
<title>Compatibility</title>
<para>
SQL99; but see also the compatibility section of <xref
linkend="sql-set-transaction" endterm="sql-set-transaction-title">.
</para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode:sgml
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sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
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sgml-default-dtd-file:"../reference.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:("/usr/lib/sgml/catalog")
sgml-local-ecat-files:nil
End:
-->
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