From 642e6859874fd8687f65c504e5188a33c9c7c1fd Mon Sep 17 00:00:00 2001
From: Henri-Damien LAURENT <henridamien.laurent@biblibre.com>
Date: Tue, 29 Nov 2011 10:57:14 +0100
Subject: [PATCH] Bug 7276 : member entry Performance improvement
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Before this patch : 9619 borrowers added in 31 Minutes, After : 68 seconds.
This adds Hashref to table structure in C4::SQLHelper to speed up bulk edits.

Signed-off-by: Stéphane Delaune <stephane.delaune@biblibre.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
---
 C4/SQLHelper.pm |   39 +++++++++++++++++++++++++++++++++------
 1 files changed, 33 insertions(+), 6 deletions(-)

diff --git a/C4/SQLHelper.pm b/C4/SQLHelper.pm
index cf425fd..900e40d 100644
--- a/C4/SQLHelper.pm
+++ b/C4/SQLHelper.pm
@@ -27,6 +27,22 @@ use C4::Debug;
 require Exporter;
 use vars qw($VERSION @ISA @EXPORT_OK %EXPORT_TAGS);
 
+eval {
+    my $servers = C4::Context->config('memcached_servers');
+    if ($servers) {
+        require Memoize::Memcached;
+        import Memoize::Memcached qw(memoize_memcached);
+
+        my $memcached = {
+            servers    => [$servers],
+            key_prefix => C4::Context->config('memcached_namespace') || 'koha',
+        };
+
+        memoize_memcached( '_get_columns',   memcached => $memcached, expire_time => 600000 );    #cache for 10 minutes
+        memoize_memcached( 'GetPrimaryKeys', memcached => $memcached, expire_time => 600000 );    #cache for 10 minutes
+    }
+};
+
 BEGIN {
 	# set the version for version checking
 	$VERSION = 0.5;
@@ -43,6 +59,9 @@ BEGIN {
 				);
 }
 
+my $tablename;
+my $hashref;
+
 =head1 NAME
 
 C4::SQLHelper - Perl Module containing convenience functions for SQL Handling
@@ -247,16 +266,24 @@ With
 =cut
 
 sub _get_columns($) {
-	my ($tablename)=@_;
-	my $dbh=C4::Context->dbh;
-	my $sth=$dbh->prepare_cached(qq{SHOW COLUMNS FROM $tablename });
-	$sth->execute;
-    my $columns= $sth->fetchall_hashref(qw(Field));
+    my ($tablename) = @_;
+    unless ( exists( $hashref->{$tablename} ) ) {
+        my $dbh = C4::Context->dbh;
+        my $sth = $dbh->prepare_cached(qq{SHOW COLUMNS FROM $tablename });
+        $sth->execute;
+        my $columns = $sth->fetchall_hashref(qw(Field));
+        $hashref->{$tablename} = $columns;
+    }
+    return $hashref->{$tablename};
 }
 
 =head2 _filter_columns
 
-    _filter_columns($tablename,$research, $filtercolumns)
+=over 4
+
+_filter_columns($tablename,$research, $filtercolumns)
+
+=back
 
 Given 
 	- a tablename 
-- 
1.7.5.4