private void CreateConstraintsForForeignKeyAssociationsAffectingThisWrapper(
FragmentQueryKB rightKB,
MemberDomainMap rightDomainMap)
{
foreach (AssociationSet assocSet in new ViewgenContext.OneToOneFkAssociationsForEntitiesFilter().Filter((IList <EntityType>) this.m_cellWrappers.Select <LeftCellWrapper, EntitySetBase>((Func <LeftCellWrapper, EntitySetBase>)(it => it.RightExtent)).OfType <EntitySet>().Select <EntitySet, EntityType>((Func <EntitySet, EntityType>)(it => it.ElementType)).ToList <EntityType>(), this.m_entityContainerMapping.EdmEntityContainer.BaseEntitySets.OfType <AssociationSet>()))
{
rightKB.CreateEquivalenceConstraintForOneToOneForeignKeyAssociation(assocSet, rightDomainMap);
}
}
/// <summary>
/// Find the Foreign Key Associations that relate EntitySets used in these left cell wrappers and
/// add any equivalence facts between sets implied by 1:1 associations.
/// We can collect other implication facts but we don't have a scenario that needs them( yet ).
/// </summary>
private void CreateConstraintsForForeignKeyAssociationsAffectingThisWrapper(
FragmentQueryKB rightKB, MemberDomainMap rightDomainMap)
{
var oneToOneForeignKeyAssociationSetsForThisWrapper
= new OneToOneFkAssociationsForEntitiesFilter()
.Filter(
m_cellWrappers.Select(it => it.RightExtent).OfType <EntitySet>().Select(it => it.ElementType).ToList(),
m_entityContainerMapping.EdmEntityContainer.BaseEntitySets.OfType <AssociationSet>());
// Collect the facts for the foreign key association sets that are 1:1 and affecting this wrapper
foreach (var assocSet in oneToOneForeignKeyAssociationSetsForThisWrapper)
{
rightKB.CreateEquivalenceConstraintForOneToOneForeignKeyAssociation(assocSet, rightDomainMap);
}
}
/// <summary>
/// Find the Foreign Key Associations that relate EntitySets used in these left cell wrappers and
/// add any equivalence facts between sets implied by 1:1 associations.
/// We can collect other implication facts but we don't have a scenario that needs them( yet ).
/// </summary>
/// <param name="rightKB"></param>
/// <param name="rightDomainMap"></param>
private void CreateConstraintsForForeignKeyAssociationsAffectingThisWarapper(FragmentQueryKB rightKB, MemberDomainMap rightDomainMap)
{
//First find the entity types of the sets in these cell wrappers.
var entityTypes = m_cellWrappers.Select(it => it.RightExtent).OfType <EntitySet>().Select(it => it.ElementType);
//Get all the foreign key association sets in these entity sets
var allForeignKeyAssociationSets = this.m_entityContainerMapping.EdmEntityContainer.BaseEntitySets.OfType <AssociationSet>().Where(it => it.ElementType.IsForeignKey);
//Find all the foreign key associations that have corresponding sets
var oneToOneForeignKeyAssociationsForThisWrapper = allForeignKeyAssociationSets.Select(it => it.ElementType);
//Find all the 1:1 associations from the above list
oneToOneForeignKeyAssociationsForThisWrapper = oneToOneForeignKeyAssociationsForThisWrapper.Where(it => (it.AssociationEndMembers.All(endMember => endMember.RelationshipMultiplicity == RelationshipMultiplicity.One)));
//Filter the 1:1 foreign key associations to the ones relating the sets used in these cell wrappers.
oneToOneForeignKeyAssociationsForThisWrapper = oneToOneForeignKeyAssociationsForThisWrapper.Where(it => (it.AssociationEndMembers.All(endMember => entityTypes.Contains(endMember.GetEntityType()))));
//filter foreign key association sets to the sets that are 1:1 and affecting this wrapper.
var oneToOneForeignKeyAssociationSetsForThisWrapper = allForeignKeyAssociationSets.Where(it => oneToOneForeignKeyAssociationsForThisWrapper.Contains(it.ElementType));
//Collect the facts for the foreign key association sets that are 1:1 and affecting this wrapper
foreach (var assocSet in oneToOneForeignKeyAssociationSetsForThisWrapper)
{
rightKB.CreateEquivalenceConstraintForOneToOneForeignKeyAssociation(assocSet, rightDomainMap, m_edmItemCollection);
}
}
// <summary>
// Find the Foreign Key Associations that relate EntitySets used in these left cell wrappers and
// add any equivalence facts between sets implied by 1:1 associations.
// We can collect other implication facts but we don't have a scenario that needs them( yet ).
// </summary>
private void CreateConstraintsForForeignKeyAssociationsAffectingThisWrapper(
FragmentQueryKB rightKB, MemberDomainMap rightDomainMap)
{
var oneToOneForeignKeyAssociationSetsForThisWrapper
= new OneToOneFkAssociationsForEntitiesFilter()
.Filter(
m_cellWrappers.Select(it => it.RightExtent).OfType<EntitySet>().Select(it => it.ElementType).ToList(),
m_entityContainerMapping.EdmEntityContainer.BaseEntitySets.OfType<AssociationSet>());
// Collect the facts for the foreign key association sets that are 1:1 and affecting this wrapper
foreach (var assocSet in oneToOneForeignKeyAssociationSetsForThisWrapper)
{
rightKB.CreateEquivalenceConstraintForOneToOneForeignKeyAssociation(assocSet, rightDomainMap);
}
}
internal ViewgenContext(ViewTarget viewTarget, EntitySetBase extent, IEnumerable<Cell> extentCells,
CqlIdentifiers identifiers, ConfigViewGenerator config, MemberDomainMap queryDomainMap,
MemberDomainMap updateDomainMap, StorageEntityContainerMapping entityContainerMapping)
{
foreach (Cell cell in extentCells)
{
Debug.Assert(extent.Equals(cell.GetLeftQuery(viewTarget).Extent));
Debug.Assert(cell.CQuery.NumProjectedSlots == cell.SQuery.NumProjectedSlots);
}
m_extent = extent;
m_viewTarget = viewTarget;
m_config = config;
m_edmItemCollection = entityContainerMapping.StorageMappingItemCollection.EdmItemCollection;
m_entityContainerMapping = entityContainerMapping;
m_identifiers = identifiers;
// create a copy of updateDomainMap so generation of query views later on is not affected
// it is modified in QueryRewriter.AdjustMemberDomainsForUpdateViews
updateDomainMap = updateDomainMap.MakeCopy();
// Create a signature generator that handles all the
// multiconstant work and generating the signatures
MemberDomainMap domainMap = viewTarget == ViewTarget.QueryView ? queryDomainMap : updateDomainMap;
m_memberMaps = new MemberMaps(viewTarget, MemberProjectionIndex.Create(extent, m_edmItemCollection), queryDomainMap, updateDomainMap);
// Create left fragment KB: includes constraints for the extent to be constructed
FragmentQueryKB leftKB = new FragmentQueryKB();
leftKB.CreateVariableConstraints(extent, domainMap, m_edmItemCollection);
m_leftFragmentQP = new FragmentQueryProcessor(leftKB);
m_rewritingCache = new Dictionary<FragmentQuery, Tile<FragmentQuery>>(
FragmentQuery.GetEqualityComparer(m_leftFragmentQP));
// Now using the signatures, create new cells such that
// "extent's" query (C or S) is described in terms of multiconstants
if (!CreateLeftCellWrappers(extentCells, viewTarget))
{
return;
}
// Create right fragment KB: includes constraints for all extents and association roles of right queries
FragmentQueryKB rightKB = new FragmentQueryKB();
MemberDomainMap rightDomainMap = viewTarget == ViewTarget.QueryView ? updateDomainMap : queryDomainMap;
foreach (LeftCellWrapper leftCellWrapper in m_cellWrappers)
{
EntitySetBase rightExtent = leftCellWrapper.RightExtent;
rightKB.CreateVariableConstraints(rightExtent, rightDomainMap, m_edmItemCollection);
rightKB.CreateAssociationConstraints(rightExtent, rightDomainMap, m_edmItemCollection);
}
if (m_viewTarget == ViewTarget.UpdateView)
{
CreateConstraintsForForeignKeyAssociationsAffectingThisWarapper(rightKB, rightDomainMap);
}
m_rightFragmentQP = new FragmentQueryProcessor(rightKB);
// Check for concurrency control tokens
if (m_viewTarget == ViewTarget.QueryView)
{
CheckConcurrencyControlTokens();
}
// For backward compatibility -
// order wrappers by increasing domain size, decreasing number of attributes
m_cellWrappers.Sort(LeftCellWrapper.Comparer);
}
/// <summary>
/// Find the Foreign Key Associations that relate EntitySets used in these left cell wrappers and
/// add any equivalence facts between sets implied by 1:1 associations.
/// We can collect other implication facts but we don't have a scenario that needs them( yet ).
/// </summary>
/// <param name="rightKB"></param>
/// <param name="rightDomainMap"></param>
private void CreateConstraintsForForeignKeyAssociationsAffectingThisWarapper(FragmentQueryKB rightKB, MemberDomainMap rightDomainMap)
{
//First find the entity types of the sets in these cell wrappers.
var entityTypes = m_cellWrappers.Select(it => it.RightExtent).OfType<EntitySet>().Select(it => it.ElementType);
//Get all the foreign key association sets in these entity sets
var allForeignKeyAssociationSets = this.m_entityContainerMapping.EdmEntityContainer.BaseEntitySets.OfType<AssociationSet>().Where(it => it.ElementType.IsForeignKey);
//Find all the foreign key associations that have corresponding sets
var oneToOneForeignKeyAssociationsForThisWrapper = allForeignKeyAssociationSets.Select(it => it.ElementType);
//Find all the 1:1 associations from the above list
oneToOneForeignKeyAssociationsForThisWrapper = oneToOneForeignKeyAssociationsForThisWrapper.Where(it => (it.AssociationEndMembers.All(endMember => endMember.RelationshipMultiplicity == RelationshipMultiplicity.One)));
//Filter the 1:1 foreign key associations to the ones relating the sets used in these cell wrappers.
oneToOneForeignKeyAssociationsForThisWrapper = oneToOneForeignKeyAssociationsForThisWrapper.Where(it => (it.AssociationEndMembers.All(endMember => entityTypes.Contains(endMember.GetEntityType()))));
//filter foreign key association sets to the sets that are 1:1 and affecting this wrapper.
var oneToOneForeignKeyAssociationSetsForThisWrapper = allForeignKeyAssociationSets.Where(it => oneToOneForeignKeyAssociationsForThisWrapper.Contains(it.ElementType));
//Collect the facts for the foreign key association sets that are 1:1 and affecting this wrapper
foreach (var assocSet in oneToOneForeignKeyAssociationSetsForThisWrapper)
{
rightKB.CreateEquivalenceConstraintForOneToOneForeignKeyAssociation(assocSet, rightDomainMap, m_edmItemCollection);
}
}
internal ViewgenContext(ViewTarget viewTarget, EntitySetBase extent, IEnumerable <Cell> extentCells,
CqlIdentifiers identifiers, ConfigViewGenerator config, MemberDomainMap queryDomainMap,
MemberDomainMap updateDomainMap, StorageEntityContainerMapping entityContainerMapping)
{
foreach (Cell cell in extentCells)
{
Debug.Assert(extent.Equals(cell.GetLeftQuery(viewTarget).Extent));
Debug.Assert(cell.CQuery.NumProjectedSlots == cell.SQuery.NumProjectedSlots);
}
m_extent = extent;
m_viewTarget = viewTarget;
m_config = config;
m_edmItemCollection = entityContainerMapping.StorageMappingItemCollection.EdmItemCollection;
m_entityContainerMapping = entityContainerMapping;
m_identifiers = identifiers;
// create a copy of updateDomainMap so generation of query views later on is not affected
// it is modified in QueryRewriter.AdjustMemberDomainsForUpdateViews
updateDomainMap = updateDomainMap.MakeCopy();
// Create a signature generator that handles all the
// multiconstant work and generating the signatures
MemberDomainMap domainMap = viewTarget == ViewTarget.QueryView ? queryDomainMap : updateDomainMap;
m_memberMaps = new MemberMaps(viewTarget, MemberProjectionIndex.Create(extent, m_edmItemCollection), queryDomainMap, updateDomainMap);
// Create left fragment KB: includes constraints for the extent to be constructed
FragmentQueryKB leftKB = new FragmentQueryKB();
leftKB.CreateVariableConstraints(extent, domainMap, m_edmItemCollection);
m_leftFragmentQP = new FragmentQueryProcessor(leftKB);
m_rewritingCache = new Dictionary <FragmentQuery, Tile <FragmentQuery> >(
FragmentQuery.GetEqualityComparer(m_leftFragmentQP));
// Now using the signatures, create new cells such that
// "extent's" query (C or S) is described in terms of multiconstants
if (!CreateLeftCellWrappers(extentCells, viewTarget))
{
return;
}
// Create right fragment KB: includes constraints for all extents and association roles of right queries
FragmentQueryKB rightKB = new FragmentQueryKB();
MemberDomainMap rightDomainMap = viewTarget == ViewTarget.QueryView ? updateDomainMap : queryDomainMap;
foreach (LeftCellWrapper leftCellWrapper in m_cellWrappers)
{
EntitySetBase rightExtent = leftCellWrapper.RightExtent;
rightKB.CreateVariableConstraints(rightExtent, rightDomainMap, m_edmItemCollection);
rightKB.CreateAssociationConstraints(rightExtent, rightDomainMap, m_edmItemCollection);
}
if (m_viewTarget == ViewTarget.UpdateView)
{
CreateConstraintsForForeignKeyAssociationsAffectingThisWarapper(rightKB, rightDomainMap);
}
m_rightFragmentQP = new FragmentQueryProcessor(rightKB);
// Check for concurrency control tokens
if (m_viewTarget == ViewTarget.QueryView)
{
CheckConcurrencyControlTokens();
}
// For backward compatibility -
// order wrappers by increasing domain size, decreasing number of attributes
m_cellWrappers.Sort(LeftCellWrapper.Comparer);
}
