commit.sgml

postgresql8.3.4源码,开源数据库

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<refentry id="SQL-COMMIT">
 <refmeta>
  <refentrytitle id="SQL-COMMIT-TITLE">COMMIT</refentrytitle>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>

 <refnamediv>
  <refname>COMMIT</refname>
  <refpurpose>commit the current transaction</refpurpose>
 </refnamediv>

 <indexterm zone="sql-commit">
  <primary>COMMIT</primary>
 </indexterm>

 <refsynopsisdiv>
<synopsis>
COMMIT [ WORK | TRANSACTION ]
</synopsis>
 </refsynopsisdiv>
  
 <refsect1>
  <title>Description</title>

  <para>
   <command>COMMIT</command> commits the current transaction. All
   changes made by the transaction become visible to others
   and are guaranteed to be durable if a crash occurs.
  </para>
 </refsect1>
  
 <refsect1>
  <title>Parameters</title>

  <variablelist>
   <varlistentry>
    <term><literal>WORK</literal></term>
    <term><literal>TRANSACTION</literal></term>
    <listitem>
     <para>
      Optional key words. They have no effect.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1>
  <title>Notes</title>

  <para>
   Use <xref linkend="SQL-ROLLBACK" endterm="SQL-ROLLBACK-TITLE"> to
   abort a transaction.
  </para>

  <para>
   Issuing <command>COMMIT</> when not inside a transaction does
   no harm, but it will provoke a warning message.
  </para>
 </refsect1>

 <refsect1>
  <title>Examples</title>

  <para>
   To commit the current transaction and make all changes permanent:
<programlisting>
COMMIT;
</programlisting>
  </para>
 </refsect1>

 <refsect1>
  <title>Compatibility</title>
  
  <para>
   The SQL standard only specifies the two forms
   <literal>COMMIT</literal> and <literal>COMMIT
   WORK</literal>. Otherwise, this command is fully conforming.
  </para>
 </refsect1>

 <refsect1>
  <title>See Also</title>

  <simplelist type="inline">
   <member><xref linkend="sql-begin" endterm="sql-begin-title"></member>
   <member><xref linkend="sql-rollback" endterm="sql-rollback-title"></member>
  </simplelist>
 </refsect1>
</refentry>