0 Replies Latest reply: Jul 29, 2013 4:25 AM by AlexandreGarnier RSS

    [BUG REPORT] JDBC Driver DatabaseMetaData.getCrossReference contract not respected

    AlexandreGarnier

      Since JDK 6, DatabaseMetaData.getCrossReference contract is :

      Retrieves a description of the foreign key columns in the given foreign key table that reference the primary key or the columns representing a unique constraint of the parent table (could be the same or a different table).

       

      But the Oracle JDBC Driver executed query is :

      SELECT
        NULL AS pktable_cat,
        p.owner as pktable_schem,
        p.table_name as pktable_name,
        pc.column_name as pkcolumn_name,
        NULL as fktable_cat,
        f.owner as fktable_schem,
        f.table_name as fktable_name,
        fc.column_name as fkcolumn_name,
        fc.position as key_seq,
        NULL as update_rule,
        decode (f.delete_rule, 'CASCADE', 0, 'SET NULL', 2, 1) as delete_rule,
        f.constraint_name as fk_name,
        p.constraint_name as pk_name,
        decode(f.deferrable, 'DEFERRABLE', 5, 'NOT DEFERRABLE', 7, 'DEFERRED', 6) deferrability
      FROM
        all_cons_columns pc,
        all_constraints p,
        all_cons_columns fc,
        all_constraints f
      WHERE 1 = 1
        AND p.table_name = :1
        AND f.table_name = :2
        AND p.owner = :3
        AND f.owner = :4
        AND f.constraint_type = 'R'
        AND p.owner = f.r_owner
        AND p.constraint_name = f.r_constraint_name
        AND p.constraint_type = 'P'
        AND pc.owner = p.owner
        AND pc.constraint_name = p.constraint_name
        AND pc.table_name = p.table_name
        AND fc.owner = f.owner
        AND fc.constraint_name = f.constraint_name
        AND fc.table_name = f.table_name
        AND fc.position = pc.position
      ORDER BY fktable_schem, fktable_name, key_seq
      ;
      

       

      The right query to get foreign keys that reference a unique constraint is :

      [...]
        AND p.constraint_type in ('P', 'U')
      [...]
      

       

      Am I missing something ? Is there a workaround ?