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25.6.17.37 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