Published fork #2 of 5.4.0 of upstream

Published fork #1 of v5.4.0 of upstream

Published fork #0 of v5.4.0 of upstream

fix some bugs

support and or expr in function, add more data type in pg

support with clause, except in mysql

support load data, cte

support alter sequence in pg, fix some bugs

support alter partition in mysql

support multipe set op in db2