support list default partition

[crazycs520]

Signed-off-by: crazycs520 crazycs520@gmail.com

What problem does this PR solve?

related parser: pingcap/parser#1062

CREATE TABLE t (a int, b int) partition by list (a) (partition p0 values IN (1), partition p1 values IN (DEFAULT));
insert into t values(1,2),(2,3),(3,4);
select * from t partition (p0);
 select * from t partition (p1);

test> CREATE TABLE t (a int, b int) partition by list (a) (partition p0 values IN (1), partition p1 values IN (DEFAULT));
Query OK, 0 rows affected
Time: 0.007s
test> insert into t values(1,2),(2,3),(3,4);
Query OK, 3 rows affected
Time: 0.004s
test> select * from t partition (p0);
+---+---+
| a | b |
+---+---+
| 1 | 2 |
+---+---+
1 row in set
Time: 0.011s
test> select * from t partition (p1);
+---+---+
| a | b |
+---+---+
| 2 | 3 |
| 3 | 4 |
+---+---+
2 rows in set

What is changed and how it works?

Check List

Tests

• Unit test

Release note

• support list default partition

[tiancaiamao]

LGTM