MT#59727 mysql: support LIMIT in sub SELECT

Change-Id: Ic3a3f7e113ed9a90dd2af16393207ede4b5e4585

lib/NGCP/BulkProcessor/SqlConnector.pm

@@ -188,12 +188,17 @@ sub vacuum {
 }
 
 sub paginate_sort_query {
+
     my $self = shift;
     my $statement = shift;
     my $offset = shift;
     my $limit = shift;
     my $sortingconfigurations = shift;
 
+    if ($statement =~ /limit\s+\d+(,\s*\d+)?\s*$/i) {
+        $statement = "SELECT * FROM ($statement) AS _ps";
+    }
+
     my $orderby = $self->_orderby_columns($sortingconfigurations);
     if (length($orderby) > 0) {
         $statement .= ' ORDER BY ' . $orderby;
@@ -937,7 +942,7 @@ sub rowblock_transactional {
 sub db_get_rowblock {
 
     my $self = shift;
-    my $max_rows = shift;
+    my $max_rows = shift; #https://www.perlmonks.org/?node_id=273952
 
     if ($enablemultithreading) {