text: -- @author prabhd
  -- @modified 2013-08-01 12:00:00
  -- @created 2013-08-01 12:00:00
  -- @db_name ptidx
  -- @tags partitionindexes
  -- @negtest True
  -- @description Negative tests Combination tests ,index exists on some regular partitions and not on the default partition
  SELECT * FROM pt_lt_tab WHERE col2 is NULL ORDER BY col2,col3 LIMIT 5; 
  