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><H1
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NAME="SQL-RELEASE-SAVEPOINT"
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>RELEASE SAVEPOINT</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN76969"
></A
><H2
>Name</H2
>RELEASE SAVEPOINT -- destroy a previously defined savepoint</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN76977"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>RELEASE [ SAVEPOINT ] <TT
CLASS="REPLACEABLE"
><I
>savepoint_name</I
></TT
></PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN76980"
></A
><H2
>Description</H2
><P
> <TT
CLASS="COMMAND"
>RELEASE SAVEPOINT</TT
> destroys a savepoint previously defined
in the current transaction.
</P
><P
> Destroying a savepoint makes it unavailable as a rollback point,
but it has no other user visible behavior. It does not undo the
effects of commands executed after the savepoint was established.
(To do that, see <A
HREF="sql-rollback-to.html"
>ROLLBACK TO SAVEPOINT</A
>.)
Destroying a savepoint when
it is no longer needed allows the system to reclaim some resources
earlier than transaction end.
</P
><P
> <TT
CLASS="COMMAND"
>RELEASE SAVEPOINT</TT
> also destroys all savepoints that were
established after the named savepoint was established.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN76988"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>savepoint_name</I
></TT
></DT
><DD
><P
> The name of the savepoint to destroy.
</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN76996"
></A
><H2
>Notes</H2
><P
> Specifying a savepoint name that was not previously defined is an error.
</P
><P
> It is not possible to release a savepoint when the transaction is in
an aborted state.
</P
><P
> If multiple savepoints have the same name, only the one that was most
recently defined is released.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN77001"
></A
><H2
>Examples</H2
><P
> To establish and later destroy a savepoint:
</P><PRE
CLASS="PROGRAMLISTING"
>BEGIN;
INSERT INTO table1 VALUES (3);
SAVEPOINT my_savepoint;
INSERT INTO table1 VALUES (4);
RELEASE SAVEPOINT my_savepoint;
COMMIT;</PRE
><P>
The above transaction will insert both 3 and 4.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN77005"
></A
><H2
>Compatibility</H2
><P
> This command conforms to the <ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
> standard. The standard
specifies that the key word <TT
CLASS="LITERAL"
>SAVEPOINT</TT
> is
mandatory, but <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> allows it to
be omitted.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN77011"
></A
><H2
>See Also</H2
><A
HREF="sql-begin.html"
>BEGIN</A
>, <A
HREF="sql-commit.html"
>COMMIT</A
>, <A
HREF="sql-rollback.html"
>ROLLBACK</A
>, <A
HREF="sql-rollback-to.html"
>ROLLBACK TO SAVEPOINT</A
>, <A
HREF="sql-savepoint.html"
>SAVEPOINT</A
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