internal LeftCellWrapper( ViewTarget viewTarget, Set <MemberPath> attrs, FragmentQuery fragmentQuery, CellQuery leftCellQuery, CellQuery rightCellQuery, MemberMaps memberMaps, Cell inputCell) : this(viewTarget, attrs, fragmentQuery, leftCellQuery, rightCellQuery, memberMaps, Enumerable.Repeat(inputCell, 1)) { }
// effects: Creates a LeftCellWrapper of the form: // Project[attrs] (Select[var IN {domain}] (Extent)) = cellquery // memberMaps is the set of maps used for producing the query or update views internal LeftCellWrapper( ViewTarget viewTarget, Set <MemberPath> attrs, FragmentQuery fragmentQuery, CellQuery leftCellQuery, CellQuery rightCellQuery, MemberMaps memberMaps, IEnumerable <Cell> inputCells) { m_leftFragmentQuery = fragmentQuery; m_rightCellQuery = rightCellQuery; m_leftCellQuery = leftCellQuery; m_attributes = attrs; m_viewTarget = viewTarget; m_memberMaps = memberMaps; m_mergedCells = new HashSet <Cell>(inputCells); }
internal ViewgenContext( ViewTarget viewTarget, EntitySetBase extent, IList<Cell> extentCells, CqlIdentifiers identifiers, ConfigViewGenerator config, MemberDomainMap queryDomainMap, MemberDomainMap updateDomainMap, EntityContainerMapping entityContainerMapping) { foreach (var 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 var 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 var leftKB = new FragmentQueryKBChaseSupport(); 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 var rightKB = new FragmentQueryKBChaseSupport(); var rightDomainMap = viewTarget == ViewTarget.QueryView ? updateDomainMap : queryDomainMap; foreach (var leftCellWrapper in m_cellWrappers) { var rightExtent = leftCellWrapper.RightExtent; rightKB.CreateVariableConstraints(rightExtent, rightDomainMap, m_edmItemCollection); rightKB.CreateAssociationConstraints(rightExtent, rightDomainMap, m_edmItemCollection); } if (m_viewTarget == ViewTarget.UpdateView) { CreateConstraintsForForeignKeyAssociationsAffectingThisWrapper(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); }