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Bug 7886 - C4/ShelfBrowser slow SQL performance
authorDobrica Pavlinusic <dpavlin@rot13.org>
Wed, 4 Apr 2012 23:03:30 +0000 (01:03 +0200)
committerPaul Poulain <paul.poulain@biblibre.com>
Tue, 10 Apr 2012 09:37:01 +0000 (11:37 +0200)
commitd8e702dd25dfb09f99620ea9f5d3251033d16864
tree3b80f872ef3aaaacec783f00fa91a2799ff41c43tree | snapshot
parentbd52531d69e0f86093a16101f87743a9f8b0c892commit | diff
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)

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
installer/data/mysql/kohastructure.sql diff | blob | history
installer/data/mysql/updatedatabase.pl diff | blob | history
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