diff options
Diffstat (limited to 'doc/src/sgml/man7/RELEASE_SAVEPOINT.7')
| -rw-r--r-- | doc/src/sgml/man7/RELEASE_SAVEPOINT.7 | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/doc/src/sgml/man7/RELEASE_SAVEPOINT.7 b/doc/src/sgml/man7/RELEASE_SAVEPOINT.7 new file mode 100644 index 0000000..4307fd5 --- /dev/null +++ b/doc/src/sgml/man7/RELEASE_SAVEPOINT.7 @@ -0,0 +1,90 @@ +'\" t +.\" Title: RELEASE SAVEPOINT +.\" Author: The PostgreSQL Global Development Group +.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/> +.\" Date: 2023 +.\" Manual: PostgreSQL 15.5 Documentation +.\" Source: PostgreSQL 15.5 +.\" Language: English +.\" +.TH "RELEASE SAVEPOINT" "7" "2023" "PostgreSQL 15.5" "PostgreSQL 15.5 Documentation" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +RELEASE_SAVEPOINT \- destroy a previously defined savepoint +.SH "SYNOPSIS" +.sp +.nf +RELEASE [ SAVEPOINT ] \fIsavepoint_name\fR +.fi +.SH "DESCRIPTION" +.PP +\fBRELEASE SAVEPOINT\fR +destroys a savepoint previously defined in the current transaction\&. +.PP +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 +ROLLBACK TO SAVEPOINT (\fBROLLBACK_TO_SAVEPOINT\fR(7))\&.) Destroying a savepoint when it is no longer needed allows the system to reclaim some resources earlier than transaction end\&. +.PP +\fBRELEASE SAVEPOINT\fR +also destroys all savepoints that were established after the named savepoint was established\&. +.SH "PARAMETERS" +.PP +\fIsavepoint_name\fR +.RS 4 +The name of the savepoint to destroy\&. +.RE +.SH "NOTES" +.PP +Specifying a savepoint name that was not previously defined is an error\&. +.PP +It is not possible to release a savepoint when the transaction is in an aborted state\&. +.PP +If multiple savepoints have the same name, only the most recently defined unreleased one is released\&. Repeated commands will release progressively older savepoints\&. +.SH "EXAMPLES" +.PP +To establish and later destroy a savepoint: +.sp +.if n \{\ +.RS 4 +.\} +.nf +BEGIN; + INSERT INTO table1 VALUES (3); + SAVEPOINT my_savepoint; + INSERT INTO table1 VALUES (4); + RELEASE SAVEPOINT my_savepoint; +COMMIT; +.fi +.if n \{\ +.RE +.\} +.sp +The above transaction will insert both 3 and 4\&. +.SH "COMPATIBILITY" +.PP +This command conforms to the +SQL +standard\&. The standard specifies that the key word +SAVEPOINT +is mandatory, but +PostgreSQL +allows it to be omitted\&. +.SH "SEE ALSO" +\fBBEGIN\fR(7), \fBCOMMIT\fR(7), \fBROLLBACK\fR(7), ROLLBACK TO SAVEPOINT (\fBROLLBACK_TO_SAVEPOINT\fR(7)), \fBSAVEPOINT\fR(7) |