Does NGDBC driver support DatabaseMetaData.getImportedKeys()?

If I try to invoke DatabaseMetaData.getImportedKeys() the resultset is empty?

If I try to run the jdbc driver query "SELECT  PKTABLE_CAT, PKTABLE_SCHEM, PKTABLE_NAME, PKCOLUMN_NAME,  FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME, FKCOLUMN_NAME,  KEY_SEQ, UPDATE_RULE, DELETE_RULE, FK_NAME, PK_NAME,  DEFERRABILITY FROM  SYS.P_IMPORTEDKEYS WHERE  SYS.P_IMPORTEDKEYS.PKTABLE_SCHEM = 'mydb'  ORDER BY PKTABLE_CAT, PKTABLE_SCHEM, UPPER(PKTABLE_NAME), KEY_SEQ" I receive an error message (SAP DBTech JDBC: [259] (at 202): invalid table name:  Could not find table/view P_IMPORTEDKEYS in schema SYS), can you hel me, please?

Thank you!