From 49c445fdce8ee48054da589e34b150b666286c88 Mon Sep 17 00:00:00 2001 From: Dobrica Pavlinusic Date: Thu, 5 Apr 2012 01:03:30 +0200 Subject: [PATCH] Bug 7886 - C4/ShelfBrowser slow SQL performance ShelfBrowser uses two SQL queries with syntax WHERE ((cn_sort = ? AND itemnumber < ?) OR cn_sort < ?) AND homebranch = ? AND location = ? AND ccode = ? homebranch already has index, and adding indexes on ccode and location improves performance by 30% for each query since MySQL is able to use index_merge intersect(items_ccode,homebranch,items_location) --- installer/data/mysql/updatedatabase.pl | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/installer/data/mysql/updatedatabase.pl b/installer/data/mysql/updatedatabase.pl index 503c8ee..f546136 100755 --- a/installer/data/mysql/updatedatabase.pl +++ b/installer/data/mysql/updatedatabase.pl @@ -5146,6 +5146,14 @@ if ( C4::Context->preference("Version") < TransformToNum($DBversion) ) { SetVersion($DBversion); } +$DBversion = "3.07.00.XXX"; +if ( C4::Context->preference("Version") < TransformToNum($DBversion) ) { + $dbh->do("CREATE INDEX items_location ON items(location)"); + $dbh->do("CREATE INDEX items_ccode ON items(ccode)"); + print "Upgrade to $DBversion done (items_location and items_ccode indexes added for ShelfBrowser)"; + SetVersion($DBversion); +} + =head1 FUNCTIONS =head2 DropAllForeignKeys($table) -- 1.7.2.5