self.check_result_auto("select c1, c2, c3 , c4, c5 ,c6 from sub1_bound ","select floor(c1), floor(c2) ,floor(c3), floor(c4), floor(c5) ,floor(c6) from sub1_bound")
self.check_result_auto("select c1, c2, c3 , c3, c2 ,c1 from sub1_bound ","select floor(c1), floor(c2) ,floor(c3), floor(c3), floor(c2) ,floor(c1) from sub1_bound")
self.check_result_auto("select floor(floor(floor(floor(floor(floor(floor(floor(floor(floor(c1)))))))))) nest_col_func from sub1_bound;","select floor(c1) from sub1_bound")