| explain plan for select * from ( | |
| select cast(s.row_key as integer) student_id, cast(s.onecf.name as varchar(30)) name, cast(s.twocf.age as integer) age, cast(s.threecf.gpa as double) gpa, cast(s.fourcf.studentnum as bigint) student_num, cast(s.fivecf.create_date as timestamp) create_date from student s where s.row_key = '800') t limit 0; |