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'\" 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"
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.\" * MAIN CONTENT STARTS HERE *
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.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\&.
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