public Reduction CreateRULE_QUERY_SELECT_WHERE2(Reduction reduction)
{
//selectType can be one of the following depending on the query text: -
// AggregateFunctionPredicate that has IsOfTypePredicate set as its ChildPredicate
object selectType = ((Reduction)reduction.GetToken(1).Data).Tag;
Predicate lhs = null;
Predicate rhs = (Predicate)((Reduction)reduction.GetToken(3).Data).Tag;
Predicate selectTypePredicate = selectType as Predicate;
Predicate result = null;
AggregateFunctionPredicate parentPredicate = selectTypePredicate as AggregateFunctionPredicate;
lhs = parentPredicate.ChildPredicate;
parentPredicate.ChildPredicate = ExpressionBuilder.CreateLogicalAndPredicate(lhs, rhs);
result = parentPredicate;
reduction.Tag = result;
if (NCacheLog.IsInfoEnabled)
{
NCacheLog.Info("CreateRULE_QUERY_SELECT_WHERE2");
}
return(null);
}
/// Implements <CountFunction> ::= 'COUNT(' <Property> ')'
public Reduction CreateRULE_COUNTFUNCTION_COUNTLPARAN_TIMES_RPARAN(Reduction reduction)
{
string typeName = ((Reduction)reduction.GetToken(1).Data).Tag as string;
Predicate childPredicate = new IsOfTypePredicate(typeName);
AggregateFunctionPredicate countFunctionPredicate = ExpressionBuilder.CreateCountFunctionPredicate() as AggregateFunctionPredicate;
countFunctionPredicate.ChildPredicate = childPredicate;
reduction.Tag = countFunctionPredicate;
return(null);
}
/// Implements <AverageFunction> ::= 'AVG(' <TypePlusAttribute> ')'
public Reduction CreateRULE_AVERAGEFUNCTION_AVGLPARAN_RPARAN(Reduction reduction)
{
Reduction typePlusAttributeReduction = (Reduction)reduction.GetToken(1).Data;
string typeName = ((Reduction)typePlusAttributeReduction.GetToken(0).Data).Tag as string;
string memberName = ((Reduction)typePlusAttributeReduction.GetToken(2).Data).Tag as string;
Predicate childPredicate = new IsOfTypePredicate(typeName);
AggregateFunctionPredicate avgFunctionPredicate = ExpressionBuilder.CreateAverageFunctionPredicate(memberName) as AggregateFunctionPredicate;
avgFunctionPredicate.ChildPredicate = childPredicate;
reduction.Tag = avgFunctionPredicate;
return(null);
}
