text: -- @author prabhd 
  -- @created 2012-12-05 12:00:00 
  -- @modified 2012-12-05 12:00:00 
  -- @tags dml 
  -- @db_name dmldb
  -- @description test5: Delete with join on distcol
  \echo --start_ignore
  set gp_enable_column_oriented_table=on;
  \echo --end_ignore
  SELECT COUNT(*) FROM dml_heap_pt_r;
  DELETE FROM dml_heap_pt_r USING dml_heap_pt_s WHERE dml_heap_pt_r.a = dml_heap_pt_s.a;
  SELECT COUNT(*) FROM dml_heap_pt_r;
  