mysql> show columns from bug20925;
Field   1:  `Field`
Catalog:    `def`
Database:   ``
Table:      `COLUMNS`
Org_table:  ``
Type:       VAR_STRING
Collation:  latin1_swedish_ci (8)
Length:     64
Max_length: 8
Decimals:   0
Flags:      NOT_NULL

Field   2:  `Type`
Catalog:    `def`
Database:   ``
Table:      `COLUMNS`
Org_table:  ``
Type:       BLOB
Collation:  latin1_swedish_ci (8)
Length:     196605
Max_length: 12
Decimals:   0
Flags:      NOT_NULL BLOB

Field   3:  `Null`
Catalog:    `def`
Database:   ``
Table:      `COLUMNS`
Org_table:  ``
Type:       VAR_STRING
Collation:  latin1_swedish_ci (8)
Length:     3
Max_length: 3
Decimals:   0
Flags:      NOT_NULL

Field   4:  `Key`
Catalog:    `def`
Database:   ``
Table:      `COLUMNS`
Org_table:  ``
Type:       VAR_STRING
Collation:  latin1_swedish_ci (8)
Length:     3
Max_length: 3
Decimals:   0
Flags:      NOT_NULL

Field   5:  `Default`
Catalog:    `def`
Database:   ``
Table:      `COLUMNS`
Org_table:  ``
Type:       VAR_STRING
Collation:  latin1_swedish_ci (8)
Length:     64
Max_length: 0
Decimals:   0
Flags:

Field   6:  `Extra`
Catalog:    `def`
Database:   ``
Table:      `COLUMNS`
Org_table:  ``
Type:       VAR_STRING
Collation:  latin1_swedish_ci (8)
Length:     20
Max_length: 14
Decimals:   0
Flags:      NOT_NULL


+----------+--------------+------+-----+---------+----------------+
| Field    | Type         | Null | Key | Default | Extra          |
+----------+--------------+------+-----+---------+----------------+
| id       | bigint(20)   | NO   | PRI | NULL    | auto_increment |
| name     | varchar(240) | YES  |     | NULL    |                |
| birthday | datetime     | NO   |     | NULL    |                |
+----------+--------------+------+-----+---------+----------------+
3 rows in set (1.89 sec)

mysql>