Management commands show some useless information

[actiontech-bot]

Raised by: @zhunina

mysql> show @@datanode where schema=tpcc;
+------+------------------+-------+--------+------+------+---------+------------+----------+---------+---------------+
| NAME | DATHOST          | INDEX | ACTIVE | IDLE | SIZE | EXECUTE | TOTAL_TIME | MAX_TIME | MAX_SQL | RECOVERY_TIME |
+------+------------------+-------+--------+------+------+---------+------------+----------+---------+---------------+
| dn1  | 10.186.21.73/db1 |     0 |      0 |    3 |  400 |   42835 |          0 |        0 |       0 |            -1 |
| dn2  | 10.186.21.75/db1 |     0 |      0 |    0 |  100 |     246 |          0 |        0 |       0 |            -1 |
| dn3  | 10.186.21.73/db2 |     0 |      0 |    1 |  400 |     246 |          0 |        0 |       0 |            -1 |
| dn4  | 10.186.21.75/db2 |     0 |      0 |    3 |  100 |   42722 |          0 |        0 |       0 |            -1 |
+------+------------------+-------+--------+------+------+---------+------------+----------+---------+---------------+
4 rows in set (0.00 sec)

mysql> show @@datanode;
+------+------------------+-------+--------+------+------+---------+------------+----------+---------+---------------+
| NAME | DATHOST          | INDEX | ACTIVE | IDLE | SIZE | EXECUTE | TOTAL_TIME | MAX_TIME | MAX_SQL | RECOVERY_TIME |
+------+------------------+-------+--------+------+------+---------+------------+----------+---------+---------------+
| dn1  | 10.186.21.73/db1 |     0 |      0 |    3 |  400 |   42840 |          0 |        0 |       0 |            -1 |
| dn2  | 10.186.21.75/db1 |     0 |      0 |    0 |  100 |     246 |          0 |        0 |       0 |            -1 |
| dn3  | 10.186.21.73/db2 |     0 |      0 |    1 |  400 |     246 |          0 |        0 |       0 |            -1 |
| dn4  | 10.186.21.75/db2 |     0 |      0 |    3 |  100 |   42727 |          0 |        0 |       0 |            -1 |
+------+------------------+-------+--------+------+------+---------+------------+----------+---------+---------------+
4 rows in set (0.00 sec)

Columns after DataHost are useless

[actiontech-bot]

By @zhunina

In show @@sql.slow, datasource is always NULL

[zhunina]

fixed