Bugzilla – Attachment 8895 Details for
Bug 7886
C4/ShelfBrowser slow SQL performance
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[patch]
Bug 7886 - C4/ShelfBrowser slow SQL performance
Bug-7886---C4ShelfBrowser-slow-SQL-performance.patch (text/plain), 1.43 KB, created by
Dobrica Pavlinusic
on 2012-04-04 23:17:42 UTC
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Description:
Bug 7886 - C4/ShelfBrowser slow SQL performance
Filename:
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Creator:
Dobrica Pavlinusic
Created:
2012-04-04 23:17:42 UTC
Size:
1.43 KB
patch
obsolete
>From 49c445fdce8ee48054da589e34b150b666286c88 Mon Sep 17 00:00:00 2001 >From: Dobrica Pavlinusic <dpavlin@rot13.org> >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
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