common_schema.text_columns;
+--------------------+-------------+------+-----+---------+-------+
| Field              | Type        | Null | Key | Default | Extra |
+--------------------+-------------+------+-----+---------+-------+
| TABLE_SCHEMA       | varchar(64) | NO   |     |         |       |
| TABLE_NAME         | varchar(64) | NO   |     |         |       |
| COLUMN_NAME        | varchar(64) | NO   |     |         |       |
| COLUMN_TYPE        | longtext    | NO   |     | NULL    |       |
| CHARAC