text: -- @author prabhd 
  -- @created 2012-12-05 12:00:00 
  -- @modified 2012-12-05 12:00:00 
  -- @tags dml 
  -- @db_name dmldb
  -- @description update_test8: Update and from values
  \echo --start_ignore
  set gp_enable_column_oriented_table=on;
  \echo --end_ignore
  SELECT * FROM dml_heap_pt_r WHERE b = 20 ORDER BY 1;
  UPDATE dml_heap_pt_r SET a = v.i + 1 FROM (VALUES(100, 20)) as v(i, j) WHERE dml_heap_pt_r.b = v.j;
  SELECT * FROM dml_heap_pt_r WHERE b = 20 ORDER BY 1;
  