protected override ShapedQueryExpression TranslateSelectMany(
ShapedQueryExpression source, LambdaExpression collectionSelector, LambdaExpression resultSelector)
{
var collectionSelectorBody = collectionSelector.Body;
//var defaultIfEmpty = false;
if (collectionSelectorBody is MethodCallExpression collectionEndingMethod &&
collectionEndingMethod.Method.IsGenericMethod &&
collectionEndingMethod.Method.GetGenericMethodDefinition() == _defaultIfEmptyWithoutArgMethodInfo)
{
//defaultIfEmpty = true;
collectionSelectorBody = collectionEndingMethod.Arguments[0];
}
var correlated = new CorrelationFindingExpressionVisitor().IsCorrelated(collectionSelectorBody, collectionSelector.Parameters[0]);
if (correlated)
{
// TODO visit inner with outer parameter;
// See #17236
throw new InvalidOperationException(CoreStrings.TranslationFailed(
collectionSelector.Print() + "; " + resultSelector.Print()));
}
else
{
if (Visit(collectionSelectorBody) is ShapedQueryExpression inner)
{
var transparentIdentifierType = TransparentIdentifierFactory.Create(
resultSelector.Parameters[0].Type,
resultSelector.Parameters[1].Type);
((InMemoryQueryExpression)source.QueryExpression).AddCrossJoin(
(InMemoryQueryExpression)inner.QueryExpression, transparentIdentifierType);
return(TranslateResultSelectorForJoin(
source,
resultSelector,
inner.ShaperExpression,
transparentIdentifierType));
}
}
throw new NotImplementedException();
}
protected override ShapedQueryExpression TranslateSelectMany(ShapedQueryExpression source, LambdaExpression collectionSelector, LambdaExpression resultSelector)
{
var collectionSelectorBody = collectionSelector.Body;
//var defaultIfEmpty = false;
if (collectionSelectorBody is MethodCallExpression collectionEndingMethod &&
collectionEndingMethod.Method.IsGenericMethod &&
collectionEndingMethod.Method.GetGenericMethodDefinition() == _defaultIfEmptyWithoutArgMethodInfo)
{
//defaultIfEmpty = true;
collectionSelectorBody = collectionEndingMethod.Arguments[0];
}
var correlated = new CorrelationFindingExpressionVisitor().IsCorrelated(collectionSelectorBody, collectionSelector.Parameters[0]);
if (correlated)
{
// TODO visit inner with outer parameter;
throw new NotImplementedException();
}
else
{
if (Visit(collectionSelectorBody) is ShapedQueryExpression inner)
{
var outerSelectExpression = (SelectExpression)source.QueryExpression;
if (outerSelectExpression.Limit != null ||
outerSelectExpression.Offset != null ||
outerSelectExpression.IsDistinct ||
outerSelectExpression.Predicate != null)
{
outerSelectExpression.PushdownIntoSubQuery();
}
var innerSelectExpression = (SelectExpression)inner.QueryExpression;
if (innerSelectExpression.Orderings.Any() ||
innerSelectExpression.Limit != null ||
innerSelectExpression.Offset != null ||
innerSelectExpression.IsDistinct ||
innerSelectExpression.Predicate != null)
{
innerSelectExpression.PushdownIntoSubQuery();
}
var transparentIdentifierType = CreateTransparentIdentifierType(
resultSelector.Parameters[0].Type,
resultSelector.Parameters[1].Type);
outerSelectExpression.AddCrossJoin(
innerSelectExpression, transparentIdentifierType);
return(TranslateResultSelectorForJoin(
source,
resultSelector,
inner.ShaperExpression,
transparentIdentifierType,
false));
}
}
throw new NotImplementedException();
}
protected override ShapedQueryExpression TranslateSelectMany(
ShapedQueryExpression source, LambdaExpression collectionSelector, LambdaExpression resultSelector)
{
var(newCollectionSelector, correlated, defaultIfEmpty)
= new CorrelationFindingExpressionVisitor().IsCorrelated(collectionSelector);
if (correlated)
{
var collectionSelectorBody = RemapLambdaBody(source, newCollectionSelector);
if (Visit(collectionSelectorBody) is ShapedQueryExpression inner)
{
var transparentIdentifierType = TransparentIdentifierFactory.Create(
resultSelector.Parameters[0].Type,
resultSelector.Parameters[1].Type);
var innerShaperExpression = inner.ShaperExpression;
if (defaultIfEmpty)
{
((SelectExpression)source.QueryExpression).AddOuterApply(
(SelectExpression)inner.QueryExpression, transparentIdentifierType);
innerShaperExpression = MarkShaperNullable(innerShaperExpression);
}
else
{
((SelectExpression)source.QueryExpression).AddCrossApply(
(SelectExpression)inner.QueryExpression, transparentIdentifierType);
}
return(TranslateResultSelectorForJoin(
source,
resultSelector,
innerShaperExpression,
transparentIdentifierType));
}
}
else
{
if (Visit(newCollectionSelector.Body) is ShapedQueryExpression inner)
{
if (defaultIfEmpty)
{
inner = TranslateDefaultIfEmpty(inner, null);
if (inner == null)
{
return(null);
}
}
var transparentIdentifierType = TransparentIdentifierFactory.Create(
resultSelector.Parameters[0].Type,
resultSelector.Parameters[1].Type);
((SelectExpression)source.QueryExpression).AddCrossJoin(
(SelectExpression)inner.QueryExpression, transparentIdentifierType);
return(TranslateResultSelectorForJoin(
source,
resultSelector,
inner.ShaperExpression,
transparentIdentifierType));
}
}
return(null);
}
