/// <summary>
/// Fixes the range of the restriction in accordance with <paramref name="range"/>.
/// Member restriction must be complete for this operation.
/// </summary>
internal override DomainBoolExpr FixRange(Set<Constant> range, MemberDomainMap memberDomainMap)
{
Debug.Assert(IsComplete, "Ranges are fixed only for complete scalar restrictions.");
IEnumerable<Constant> newPossibleValues = memberDomainMap.GetDomain(RestrictedMemberSlot.MemberPath);
BoolLiteral newLiteral = new ScalarRestriction(RestrictedMemberSlot, new Domain(range, newPossibleValues));
return newLiteral.GetDomainBoolExpression(memberDomainMap);
}
/// <summary>
/// Fixes the range of the restriction in accordance with <paramref name="range"/>.
/// Member restriction must be complete for this operation.
/// </summary>
internal override DomainBoolExpr FixRange(Set <Constant> range, MemberDomainMap memberDomainMap)
{
Debug.Assert(IsComplete, "Ranges are fixed only for complete scalar restrictions.");
IEnumerable <Constant> newPossibleValues = memberDomainMap.GetDomain(RestrictedMemberSlot.MemberPath);
BoolLiteral newLiteral = new ScalarRestriction(RestrictedMemberSlot, new Domain(range, newPossibleValues));
return(newLiteral.GetDomainBoolExpression(memberDomainMap));
}
// requires: The CellConstantDomains in the OneOfConsts of the where
// clause are partially done
// effects: Given the domains of different variables in domainMap,
// fixes the whereClause of this such that all the
// CellConstantDomains in OneOfConsts are complete
internal void UpdateWhereClause(MemberDomainMap domainMap)
{
List <BoolExpression> atoms = new List <BoolExpression>();
foreach (BoolExpression atom in WhereClause.Atoms)
{
BoolLiteral literal = atom.AsLiteral;
MemberRestriction restriction = literal as MemberRestriction;
Debug.Assert(restriction != null, "All bool literals must be OneOfConst at this point");
// The oneOfConst needs to be fixed with the new possible values from the domainMap.
IEnumerable <Constant> possibleValues = domainMap.GetDomain(restriction.RestrictedMemberSlot.MemberPath);
MemberRestriction newOneOf = restriction.CreateCompleteMemberRestriction(possibleValues);
// Prevent optimization of single constraint e.g: "300 in (300)"
// But we want to optimize type constants e.g: "category in (Category)"
// To prevent optimization of bool expressions we add a Sentinel OneOF
ScalarRestriction scalarConst = restriction as ScalarRestriction;
bool addSentinel =
scalarConst != null &&
!scalarConst.Domain.Contains(Constant.Null) &&
!scalarConst.Domain.Contains(Constant.NotNull) &&
!scalarConst.Domain.Contains(Constant.Undefined);
if (addSentinel)
{
domainMap.AddSentinel(newOneOf.RestrictedMemberSlot.MemberPath);
}
atoms.Add(BoolExpression.CreateLiteral(newOneOf, domainMap));
if (addSentinel)
{
domainMap.RemoveSentinel(newOneOf.RestrictedMemberSlot.MemberPath);
}
}
// We create a new whereClause that has the memberDomainMap set
if (atoms.Count > 0)
{
m_whereClause = BoolExpression.CreateAnd(atoms.ToArray());
}
}
/// <summary>
/// Takes in a JoinTreeNode and a Contition Property Map and creates an BoolExpression
/// for the Condition Map.
/// </summary>
/// <param name="joinTreeNode"></param>
/// <param name="conditionMap"></param>
/// <returns></returns>
private static BoolExpression GetConditionExpression(MemberPath member, StorageConditionPropertyMapping conditionMap)
{
//Get the member for which the condition is being specified
EdmMember conditionMember = (conditionMap.ColumnProperty != null) ? conditionMap.ColumnProperty : conditionMap.EdmProperty;
var conditionMemberNode = new MemberPath(member, conditionMember);
//Check if this is a IsNull condition
MemberRestriction conditionExpression = null;
if (conditionMap.IsNull.HasValue)
{
// for conditions on scalars, create NodeValue nodes, otherwise NodeType
var conditionConstant = conditionMap.IsNull.Value ? Constant.Null : Constant.NotNull;
if (MetadataHelper.IsNonRefSimpleMember(conditionMember))
{
conditionExpression = new ScalarRestriction(conditionMemberNode, conditionConstant);
}
else
{
conditionExpression = new TypeRestriction(conditionMemberNode, conditionConstant);
}
}
else
{
conditionExpression = new ScalarRestriction(conditionMemberNode, new ScalarConstant(conditionMap.Value));
}
Debug.Assert(conditionExpression != null);
return BoolExpression.CreateLiteral(conditionExpression, null);
}
