28.3.9 The INFORMATION_SCHEMA COLUMNS_EXTENSIONS Table

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MySQL 8.4 Reference Manual Including MySQL NDB Cluster 8.4

28.3.9 The INFORMATION_SCHEMA COLUMNS_EXTENSIONS Table

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_CATALOG

The name of the catalog to which the table belongs. This value is always def. - TABLE_SCHEMA

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

The name of the table. - COLUMN_NAME

The name of the column. - ENGINE_ATTRIBUTE

Column attributes defined for the primary storage engine. Reserved for future use. - SECONDARY_ENGINE_ATTRIBUTE

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