Index: branches/release-35/lib/MT/ObjectDriver/DDL/mysql.pm
===================================================================
--- branches/release-35/lib/MT/ObjectDriver/DDL/mysql.pm (revision 1174)
+++ branches/release-35/lib/MT/ObjectDriver/DDL/mysql.pm (revision 1927)
@@ -22,4 +22,5 @@
     my $field_prefix = $class->datasource;
     my $table_name = $class->table_name;
+    local $dbh->{RaiseError} = 0;
     my $sth = $dbh->prepare('SHOW INDEX FROM ' . $table_name)
         or return undef;