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 ALTER TABLE, Unique index with Primary Key
  ALTER TABLE pt_lt_tab ADD primary key(col2,col1);
  SELECT * FROM pt_lt_tab WHERE col2 <> 10 ORDER BY col2,col3 LIMIT 5;
  