From 2f250a1faacb716faf384f5b540489c7e81de4d0 Mon Sep 17 00:00:00 2001
From: Ere Maijala <ere.maijala@helsinki.fi>
Date: Wed, 20 Feb 2019 16:27:01 +0200
Subject: [PATCH] Bug 20447: Add a batch rebuild script for holdings table

This script can be used to update the columns in the holdings table from the MARC record using the rules in the framework. In practice this will only be required if the koha link field is changed in the framework.
---
 misc/batchRebuildHoldingsTables.pl | 65 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100755 misc/batchRebuildHoldingsTables.pl

diff --git a/misc/batchRebuildHoldingsTables.pl b/misc/batchRebuildHoldingsTables.pl
new file mode 100755
index 0000000000..3483ebf841
--- /dev/null
+++ b/misc/batchRebuildHoldingsTables.pl
@@ -0,0 +1,65 @@
+#!/usr/bin/perl
+# Small script that rebuilds the non-MARC Holdings DB
+
+use strict;
+use warnings;
+
+BEGIN {
+    # find Koha's Perl modules
+    # test carefully before changing this
+    use FindBin;
+    eval { require "$FindBin::Bin/kohalib.pl" };
+}
+
+# Koha modules used
+use Koha::Holdings;
+
+use Getopt::Long;
+
+my ($input_marc_file, $number) = ('', 0);
+my ($help, $confirm);
+GetOptions(
+    'c' => \$confirm,
+    'h' => \$help,
+);
+
+if ($help || !$confirm) {
+    print <<EOF
+This script rebuilds the non-MARC Holdings DB from the MARC values.
+You can/must use it when you change the mappings.
+
+Example: you decide to map holdings.callnumber to 852\$k\$l\$m (it was previously mapped to 852\$k).
+
+Syntax:
+\t./batchRebuildHoldingsTables.pl -h (or without arguments => shows this screen)
+\t./batchRebuildHoldingsTables.pl -c (c like confirm => rebuild non-MARC DB (may take long)
+EOF
+;
+    exit;
+}
+
+my $starttime = time();
+
+$| = 1; # flushes output
+
+my $count = 0;
+my $page = 0;
+my $rows = 1000;
+while (1) {
+    ++$page;
+    my $holdings = Koha::Holdings->search({}, {page => $page, rows => $rows});
+    my $i = 0;
+    while (my $holding = $holdings->next()) {
+        my $metadata = $holding->metadata();
+        next unless $metadata;
+        $holding->set_marc({ record => $metadata->record() });
+        $holding->store();
+        ++$i;
+    }
+    last unless $i;
+    $count += $i;
+    my $timeneeded = time() - $starttime;
+    print "$count records processed in $timeneeded seconds\n";
+}
+my $timeneeded = time() - $starttime;
+print "Completed with $count records processed in $timeneeded seconds\n";
-- 
2.11.0