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107 lines
3.1 KiB
Perl
Executable File
107 lines
3.1 KiB
Perl
Executable File
#!/usr/bin/perl
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# clean_pending.pl
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# This perl script removes entries from the pending,pendingKeys,
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# pendingDeleteData tables that have already been mirrored to all hosts.
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#
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#
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#
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# Written by Steven Singer (ssinger@navtechinc.com)
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# (c) 2001-2002 Navtech Systems Support Inc.
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# Released under the GNU Public License version 2. See COPYING.
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#
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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##############################################################################
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# $PostgreSQL: pgsql/contrib/dbmirror/clean_pending.pl,v 1.4 2003/11/29 22:39:19 pgsql Exp $
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##############################################################################
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=head1 NAME
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clean_pending.pl - A Perl script to remove old entries from the
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pending, pendingKeys, and pendingDeleteData tables.
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=head1 SYNPOSIS
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clean_pending.pl databasename
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=head1 DESCRIPTION
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This Perl script connects to the database specified as a command line argument
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on the local system. It uses a hard-coded username and password.
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It then removes any entries from the pending, pendingDeleteData, and
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pendingKeys tables that have already been sent to all hosts in mirrorHosts.
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=cut
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BEGIN {
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# add in a global path to files
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#Ensure that Pg is in the path.
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}
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use strict;
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use Pg;
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if ($#ARGV != 0) {
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die "usage: clean_pending.pl configFile\n";
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}
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if( ! defined do $ARGV[0]) {
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die("Invalid Configuration file $ARGV[0]");
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}
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#connect to the database.
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my $connectString = "host=$::masterHost dbname=$::masterDb user=$::masterUser password=$::masterPassword";
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my $dbConn = Pg::connectdb($connectString);
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unless($dbConn->status == PGRES_CONNECTION_OK) {
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printf("Can't connect to database\n");
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die;
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}
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my $result = $dbConn->exec("BEGIN");
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unless($result->resultStatus == PGRES_COMMAND_OK) {
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die $dbConn->errorMessage;
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}
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#delete all transactions that have been sent to all mirrorhosts
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#or delete everything if no mirror hosts are defined.
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# Postgres takes the "SELECT COUNT(*) FROM "MirrorHost" and makes it into
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# an InitPlan. EXPLAIN show's this.
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my $deletePendingQuery = 'DELETE FROM "Pending" WHERE (SELECT ';
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$deletePendingQuery .= ' COUNT(*) FROM "MirroredTransaction" WHERE ';
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$deletePendingQuery .= ' "XID"="Pending"."XID") = (SELECT COUNT(*) FROM ';
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$deletePendingQuery .= ' "MirrorHost") OR (SELECT COUNT(*) FROM ';
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$deletePendingQuery .= ' "MirrorHost") = 0';
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my $result = $dbConn->exec($deletePendingQuery);
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unless ($result->resultStatus == PGRES_COMMAND_OK ) {
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printf($dbConn->errorMessage);
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die;
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}
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$dbConn->exec("COMMIT");
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$result = $dbConn->exec('VACUUM "Pending"');
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unless ($result->resultStatus == PGRES_COMMAND_OK) {
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printf($dbConn->errorMessage);
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}
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$result = $dbConn->exec('VACUUM "PendingData"');
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unless($result->resultStatus == PGRES_COMMAND_OK) {
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printf($dbConn->errorMessage);
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}
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$result = $dbConn->exec('VACUUM "MirroredTransaction"');
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unless($result->resultStatus == PGRES_COMMAND_OK) {
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printf($dbConn->errorMessage);
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}
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