25.6.16.36 The ndbinfo foreign_keys Table

The foreign_keys table provides information about foreign keys on NDB tables. This table has the following columns:

• object_id

  The foreign key's object ID

• name

  Name of the foreign key

• parent_table

  The name of the foreign key's parent table

• parent_columns

  A comma-delimited list of parent columns

• child_table

  The name of the child table

• child_columns

  A comma-separated list of child columns

• parent_index

  Name of the parent index

• child_index

  Name of the child index

• on_update_action

  The ON UPDATE action specified for the foreign key; one of No Action, Restrict, Cascade, Set Null, or Set Default

• on_delete_action

  The ON DELETE action specified for the foreign key; one of No Action, Restrict, Cascade, Set Null, or Set Default

The foreign_keys table was added in NDB 8.0.29.