[Koha-patches] [PATCH] bug 2859: add index on bibioitems.issn (DB rev 006)

[Galen Charlton]

Because of a query on biblioitems.issn in
C4::Breeding::ImportBreeding(), libraries doing a lot
of bib imports were experiencing performance problems,
which adding an index will alleviate.

A possible longer term solution is to index all
reservoir/import batch records in a Zebra database.

[LL bug 232]
---
 installer/data/mysql/kohastructure.sql |    1 +
 installer/data/mysql/updatedatabase.pl |    7 +++++++
 kohaversion.pl                         |    2 +-
 3 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/installer/data/mysql/kohastructure.sql b/installer/data/mysql/kohastructure.sql
index fa93a05..b2e7515 100644
--- a/installer/data/mysql/kohastructure.sql
+++ b/installer/data/mysql/kohastructure.sql
@@ -420,6 +420,7 @@ CREATE TABLE `biblioitems` (
   KEY `bibnoidx` (`biblionumber`),
   KEY `isbn` (`isbn`),
   KEY `publishercode` (`publishercode`),
+  KEY `issn` (`issn`),
   CONSTRAINT `biblioitems_ibfk_1` FOREIGN KEY (`biblionumber`) REFERENCES `biblio` (`biblionumber`) ON DELETE CASCADE ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
diff --git a/installer/data/mysql/updatedatabase.pl b/installer/data/mysql/updatedatabase.pl
index 6c14e97..fdebcf9 100755
--- a/installer/data/mysql/updatedatabase.pl
+++ b/installer/data/mysql/updatedatabase.pl
@@ -2060,6 +2060,13 @@ if (C4::Context->preference("Version") < TransformToNum($DBversion)) {
     SetVersion ($DBversion);
 }
 
+$DBversion = '3.01.00.006';
+if (C4::Context->preference("Version") < TransformToNum($DBversion)) {
+    $dbh->do("ALTER TABLE `biblioitems` ADD KEY issn (issn)");
+    print "Upgrade to $DBversion done (add index on biblioitems.issn)\n";
+    SetVersion ($DBversion);
+}
+
 =item DropAllForeignKeys($table)
 
   Drop all foreign keys of the table $table
diff --git a/kohaversion.pl b/kohaversion.pl
index a6eaa26..12d23eb 100644
--- a/kohaversion.pl
+++ b/kohaversion.pl
@@ -10,7 +10,7 @@
 use strict;
 
 sub kohaversion {
-    our $VERSION = '3.01.00.005';
+    our $VERSION = '3.01.00.006';
     # version needs to be set this way
     # so that it can be picked up by Makefile.PL
     # during install
-- 
1.5.5.GIT