--- /dev/null
+$DBversion = "16.06.00.XXX";
+if ( CheckVersion($DBversion) ) {
+
+ # If index issn_idx still exists, we assume that dbrev 3.15.00.049 failed,
+ # and we repeat it (partially).
+ # Note: the db rev only pertains to biblioitems and is not needed for
+ # deletedbiblioitems.
+
+ my $temp = $dbh->selectall_arrayref( "SHOW INDEXES FROM biblioitems WHERE key_name = 'issn_idx'" );
+
+ if( @$temp > 0 ) {
+ $dbh->do( "ALTER TABLE biblioitems DROP INDEX isbn" );
+ $dbh->do( "ALTER TABLE biblioitems DROP INDEX issn" );
+ $dbh->do( "ALTER TABLE biblioitems DROP INDEX issn_idx" );
+ $dbh->do( "ALTER TABLE biblioitems CHANGE isbn isbn MEDIUMTEXT NULL DEFAULT NULL, CHANGE issn issn MEDIUMTEXT NULL DEFAULT NULL" );
+ $dbh->do( "ALTER TABLE biblioitems ADD INDEX isbn ( isbn ( 255 ) ), ADD INDEX issn ( issn ( 255 ) )" );
+ print "Upgrade to $DBversion done (Bug 8835). Removed issn_idx.\n";
+ } else {
+ print "Upgrade to $DBversion done (Bug 8835). Everything is fine.\n";
+ }
+
+ SetVersion($DBversion);
+}