28.3.43 The INFORMATION_SCHEMA TABLE_CONSTRAINTS_EXTENSIONS Table

The TABLE_CONSTRAINTS_EXTENSIONS table (available as of MySQL 8.0.21) provides information about table constraint attributes defined for primary and secondary storage engines.

Note

The TABLE_CONSTRAINTS_EXTENSIONS table is reserved for future use.

The TABLE_CONSTRAINTS_EXTENSIONS table has these columns:

• CONSTRAINT_CATALOG

  The name of the catalog to which the table belongs.

• CONSTRAINT_SCHEMA

  The name of the schema (database) to which the table belongs.

• CONSTRAINT_NAME

  The name of the constraint.

• TABLE_NAME

  The name of the table.

• ENGINE_ATTRIBUTE

  Constraint attributes defined for the primary storage engine. Reserved for future use.

• SECONDARY_ENGINE_ATTRIBUTE

  Constraint attributes defined for the secondary storage engine. Reserved for future use.