public static Set < String > getPrimaryKey ( DatabaseMetaData metadata , String tableName ) throws Exception { Set < String > columns = new HashSet < String > ( ) ; ResultSet keys = metadata . getPrimaryKeys ( metadata . getConnection ( ) . getCatalog ( ) , metadata . getUserName ( ) , tableName ) ; while ( keys . next ( ) ) { columns . add ( keys . getString ( PRIMARY_PK_COL_NAME ) ) ; } keys . close ( ) ; return columns ; }
Returns a table s primary key columns as a Set of strings .