Firebird SQL & Interbase list of all foreign keys
With that simple peace of code you can retrive the full list of all “FK” Foreign Key of an Interbase or Firebird DB.
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SELECT rc.RDB$CONSTRAINT_NAME AS constraint_name, i.RDB$RELATION_NAME AS table_name, s.RDB$FIELD_NAME AS field_name, i.RDB$DESCRIPTION AS description, rc.RDB$DEFERRABLE AS is_deferrable, rc.RDB$INITIALLY_DEFERRED AS is_deferred, refc.RDB$UPDATE_RULE AS on_update, refc.RDB$DELETE_RULE AS on_delete, refc.RDB$MATCH_OPTION AS match_type, i2.RDB$RELATION_NAME AS references_table, s2.RDB$FIELD_NAME AS references_field, (s.RDB$FIELD_POSITION + 1) AS field_position FROM RDB$INDEX_SEGMENTS s LEFT JOIN RDB$INDICES i ON i.RDB$INDEX_NAME = s.RDB$INDEX_NAME LEFT JOIN RDB$RELATION_CONSTRAINTS rc ON rc.RDB$INDEX_NAME = s.RDB$INDEX_NAME LEFT JOIN RDB$REF_CONSTRAINTS refc ON rc.RDB$CONSTRAINT_NAME = refc.RDB$CONSTRAINT_NAME LEFT JOIN RDB$RELATION_CONSTRAINTS rc2 ON rc2.RDB$CONSTRAINT_NAME = refc.RDB$CONST_NAME_UQ LEFT JOIN RDB$INDICES i2 ON i2.RDB$INDEX_NAME = rc2.RDB$INDEX_NAME LEFT JOIN RDB$INDEX_SEGMENTS s2 ON i2.RDB$INDEX_NAME = s2.RDB$INDEX_NAME WHERE rc.RDB$CONSTRAINT_TYPE = 'FOREIGN KEY' ORDER BY s.RDB$FIELD_POSITION |
