protected override void FlattenSubQuery(
[NotNull] SubQueryExpression subQueryExpression,
[NotNull] FromClauseBase fromClause,
[NotNull] QueryModel queryModel,
int destinationIndex)
{
Check.NotNull(subQueryExpression, nameof(subQueryExpression));
Check.NotNull(fromClause, nameof(fromClause));
Check.NotNull(queryModel, nameof(queryModel));
var subQueryModel = subQueryExpression.QueryModel;
VisitQueryModel(subQueryModel);
if ((subQueryModel.ResultOperators
.All(ro => (ro is OfTypeResultOperator || ro is CastResultOperator)) &&
!subQueryModel.BodyClauses.Any(bc => bc is OrderByClause)) ||
(queryModel.IsIdentityQuery() &&
!queryModel.ResultOperators.Any()))
{
var innerMainFromClause = subQueryExpression.QueryModel.MainFromClause;
var isGeneratedNameOuter = fromClause.HasGeneratedItemName();
var outerItemName = fromClause.ItemName;
CopyFromClauseData(innerMainFromClause, fromClause);
if (innerMainFromClause.HasGeneratedItemName() &&
!isGeneratedNameOuter)
{
fromClause.ItemName = outerItemName;
}
var innerSelectorMapping = new QuerySourceMapping();
innerSelectorMapping.AddMapping(fromClause, subQueryExpression.QueryModel.SelectClause.Selector);
queryModel.TransformExpressions(
ex => ReferenceReplacingExpressionVisitor
.ReplaceClauseReferences(ex, innerSelectorMapping, false));
InsertBodyClauses(subQueryExpression.QueryModel.BodyClauses, queryModel, destinationIndex);
foreach (var resultOperator in subQueryModel.ResultOperators.Reverse())
{
queryModel.ResultOperators.Insert(0, resultOperator);
}
var innerBodyClauseMapping = new QuerySourceMapping();
innerBodyClauseMapping
.AddMapping(innerMainFromClause, new QuerySourceReferenceExpression(fromClause));
queryModel.TransformExpressions(ex =>
ReferenceReplacingExpressionVisitor.ReplaceClauseReferences(ex, innerBodyClauseMapping, false));
foreach (var queryAnnotation
in _queryAnnotations
.Where(qa => qa.QuerySource == subQueryExpression.QueryModel.MainFromClause))
{
queryAnnotation.QuerySource = fromClause;
queryAnnotation.QueryModel = queryModel;
}
}
}
