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Direktori : /opt/alt/postgresql11/usr/share/man/man7/ |
Current File : //opt/alt/postgresql11/usr/share/man/man7/DISCARD.7 |
'\" t .\" Title: DISCARD .\" Author: The PostgreSQL Global Development Group .\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/> .\" Date: 2017-11-06 .\" Manual: PostgreSQL 9.2.24 Documentation .\" Source: PostgreSQL 9.2.24 .\" Language: English .\" .TH "DISCARD" "7" "2017-11-06" "PostgreSQL 9.2.24" "PostgreSQL 9.2.24 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" DISCARD \- discard session state .\" DISCARD .SH "SYNOPSIS" .sp .nf DISCARD { ALL | PLANS | TEMPORARY | TEMP } .fi .SH "DESCRIPTION" .PP \fBDISCARD\fR releases internal resources associated with a database session\&. These resources are normally released at the end of the session\&. .PP \fBDISCARD TEMP\fR drops all temporary tables created in the current session\&. \fBDISCARD PLANS\fR releases all internally cached query plans\&. \fBDISCARD ALL\fR resets a session to its original state, discarding temporary resources and resetting session\-local configuration changes\&. .SH "PARAMETERS" .PP TEMPORARY or TEMP .RS 4 Drops all temporary tables created in the current session\&. .RE .PP PLANS .RS 4 Releases all cached query plans\&. .RE .PP ALL .RS 4 Releases all temporary resources associated with the current session and resets the session to its initial state\&. Currently, this has the same effect as executing the following sequence of statements: .sp .if n \{\ .RS 4 .\} .nf SET SESSION AUTHORIZATION DEFAULT; RESET ALL; DEALLOCATE ALL; CLOSE ALL; UNLISTEN *; SELECT pg_advisory_unlock_all(); DISCARD PLANS; DISCARD TEMP; .fi .if n \{\ .RE .\} .RE .SH "NOTES" .PP \fBDISCARD ALL\fR cannot be executed inside a transaction block\&. .SH "COMPATIBILITY" .PP \fBDISCARD\fR is a PostgreSQL extension\&.