private Operator interpretedFilterProject(
Expression filter, Expression projection, Session session) {
FilterFunction filterFunction =
new InterpretedFilterFunction(
filter, SYMBOL_TYPES, INPUT_MAPPING, metadata, SQL_PARSER, session);
ProjectionFunction projectionFunction =
new InterpretedProjectionFunction(
projection, SYMBOL_TYPES, INPUT_MAPPING, metadata, SQL_PARSER, session);
OperatorFactory operatorFactory =
new FilterAndProjectOperator.FilterAndProjectOperatorFactory(
0,
new GenericPageProcessor(filterFunction, ImmutableList.of(projectionFunction)),
toTypes(ImmutableList.of(projectionFunction)));
return operatorFactory.createOperator(createDriverContext(session));
}
private static boolean executeFilter(OperatorFactory operatorFactory, Session session) {
return executeFilter(operatorFactory.createOperator(createDriverContext(session)));
}
private Object selectSingleValue(OperatorFactory operatorFactory, Session session) {
Operator operator = operatorFactory.createOperator(createDriverContext(session));
return selectSingleValue(operator);
}