Adding upstream version 15.4.upstream/15.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 96 insertions, 0 deletions

diff --git a/doc/src/sgml/man7/DISCARD.7 b/doc/src/sgml/man7/DISCARD.7
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+'\" t
+.\"     Title: DISCARD
+.\"    Author: The PostgreSQL Global Development Group
+.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
+.\"      Date: 2023
+.\"    Manual: PostgreSQL 15.4 Documentation
+.\"    Source: PostgreSQL 15.4
+.\"  Language: English
+.\"
+.TH "DISCARD" "7" "2023" "PostgreSQL 15.4" "PostgreSQL 15.4 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
+.SH "SYNOPSIS"
+.sp
+.nf
+DISCARD { ALL | PLANS | SEQUENCES | TEMPORARY | TEMP }
+.fi
+.SH "DESCRIPTION"
+.PP
+\fBDISCARD\fR
+releases internal resources associated with a database session\&. This command is useful for partially or fully resetting the session\*(Aqs state\&. There are several subcommands to release different types of resources; the
+\fBDISCARD ALL\fR
+variant subsumes all the others, and also resets additional state\&.
+.SH "PARAMETERS"
+.PP
+PLANS
+.RS 4
+Releases all cached query plans, forcing re\-planning to occur the next time the associated prepared statement is used\&.
+.RE
+.PP
+SEQUENCES
+.RS 4
+Discards all cached sequence\-related state, including
+\fBcurrval()\fR/\fBlastval()\fR
+information and any preallocated sequence values that have not yet been returned by
+\fBnextval()\fR\&. (See
+CREATE SEQUENCE (\fBCREATE_SEQUENCE\fR(7))
+for a description of preallocated sequence values\&.)
+.RE
+.PP
+TEMPORARY or TEMP
+.RS 4
+Drops all temporary tables created in the current session\&.
+.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
+CLOSE ALL;
+SET SESSION AUTHORIZATION DEFAULT;
+RESET ALL;
+DEALLOCATE ALL;
+UNLISTEN *;
+SELECT pg_advisory_unlock_all();
+DISCARD PLANS;
+DISCARD TEMP;
+DISCARD SEQUENCES;
+.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\&.