Expression function ( ) { return newval ; }
returns an expression . evaluating this expression for a record produces the value that will be stored in the record 's target field . concode_field_sep String fldname concode_elem_sep Predicate pred concode_elem_sep String tblname concode_elem_sep Expression newval concode_field_sep String targetField concode_elem_sep Predicate pred concode_elem_sep String tableName