question: public Value [ ] readRow ( Value [ ] row ) throws SQLException { StatementBuilder buff = new StatementBuilder ( "SELECT " ) ; appendColumnList ( buff , false ) ; buff . append ( " FROM " ) ; appendTableName ( buff ) ; appendKeyCondition ( buff ) ; PreparedStatement prep = conn . prepareStatement ( buff . toString ( ) ) ; setKey ( prep , 1 , row ) ; ResultSet rs = prep . executeQuery ( ) ; if ( ! rs . next ( ) ) { throw DbException . get ( ErrorCode . NO_DATA_AVAILABLE ) ; } Value [ ] newRow = new Value [ columnCount ] ; for ( int i = 0 ; i < columnCount ; i ++ ) { int type = result . getColumnType ( i ) ; newRow [ i ] = DataType . readValue ( conn . getSession ( ) , rs , i + 1 , type ) ; } return newRow ; }
target:  Re-reads a row from the database and updates the values in the array.