MySQL 8.3 Release Notes
The COLUMNS_EXTENSIONS table provides information about column attributes defined for primary and secondary storage engines.
Note
The COLUMNS_EXTENSIONS table is reserved for future use.
The COLUMNS_EXTENSIONS table has these columns:
-
TABLE_CATALOGThe name of the catalog to which the table belongs. This value is always
def. -
TABLE_SCHEMAThe name of the schema (database) to which the table belongs.
-
TABLE_NAMEThe name of the table.
-
COLUMN_NAMEThe name of the column.
-
ENGINE_ATTRIBUTEColumn attributes defined for the primary storage engine. Reserved for future use.
-
SECONDARY_ENGINE_ATTRIBUTEColumn attributes defined for the secondary storage engine. Reserved for future use.