public override void VisitResultOperator(ResultOperatorBase resultOperator, QueryModel queryModel, int index)
{
var streamedDataInfo
= resultOperator.GetOutputDataInfo(_streamedSequenceInfo);
Func <Expression, Type, ResultOperatorBase, Expression> asyncHandler;
if (!_asyncHandlers.TryGetValue(resultOperator.GetType(), out asyncHandler))
{
// TODO: Implement the rest...
throw new NotImplementedException();
}
_expression
= asyncHandler(_expression, _streamedSequenceInfo.ResultItemType, resultOperator);
_streamedSequenceInfo = streamedDataInfo as StreamedSequenceInfo;
}
public override void VisitResultOperator(
[NotNull] ResultOperatorBase resultOperator, [NotNull] QueryModel queryModel, int index)
{
Check.NotNull(resultOperator, "resultOperator");
Check.NotNull(queryModel, "queryModel");
var expression
= _queryCompilationContext.ResultOperatorHandler
.HandleResultOperator(this, resultOperator, queryModel);
if (expression != _expression)
{
_expression = expression;
_streamedSequenceInfo
= resultOperator.GetOutputDataInfo(_streamedSequenceInfo)
as StreamedSequenceInfo;
}
}
public override void VisitResultOperator(ResultOperatorBase resultOperator, QueryModel queryModel, int index)
{
PreviousEvaluationType = CurrentEvaluationType;
CurrentEvaluationType = resultOperator.GetOutputDataInfo(PreviousEvaluationType);
if (resultOperator is ClientSideTransformOperator)
{
_serverSide = false;
}
else
{
if (!_serverSide)
{
throw new NotSupportedException("Processing server-side result operator after doing client-side ones. We've got the ordering wrong...");
}
}
ResultOperatorMap.Process(resultOperator, this, _hqlTree);
}
private static IStreamedDataInfo GetOutputDataInfo(ResultOperatorBase resultOperator, IStreamedDataInfo evaluationType)
{
//ContainsResultOperator contains data integrity check so for `values.Contains(x)` it checks that 'x' is proper type to be used inside 'values.Contains()'
//Due to some reasons (possibly NH expression rewritings) those types might be incompatible (known case NH-3155 - group by subquery). So resultOperator.GetOutputDataInfo throws something like:
//System.ArgumentException : The items of the input sequence of type 'System.Linq.IGrouping`2[System.Object[],EntityType]' are not compatible with the item expression of type 'System.Int32'.
//Parameter name: inputInfo
//at Remotion.Linq.Clauses.ResultOperators.ContainsResultOperator.GetOutputDataInfo(StreamedSequenceInfo inputInfo)
//But in this place we don't really care about types involving inside expression, all we need to know is operation result which is bool for Contains
//So let's skip possible type exception mismatch if it allows to generate proper SQL
switch (resultOperator)
{
case ContainsResultOperator _:
case AnyResultOperator _:
case AllResultOperator _:
return(new StreamedScalarValueInfo(typeof(bool)));
}
return(resultOperator.GetOutputDataInfo(evaluationType));
}
public override void VisitResultOperator(ResultOperatorBase resultOperator, QueryModel queryModel, int index)
{
// TODO: sub-queries in result op. expressions
// resultOperator
// .TransformExpressions(e =>
// ReplaceClauseReferences(new QueryingExpressionTreeVisitor(this)
// .VisitExpression(e)));
var streamedDataInfo
= resultOperator.GetOutputDataInfo(_streamedSequenceInfo);
_expression
= Expression.Call(
_executeResultOperatorMethodInfo
.MakeGenericMethod(_streamedSequenceInfo.ResultItemType, streamedDataInfo.DataType),
_expression,
Expression.Constant(resultOperator),
Expression.Constant(_streamedSequenceInfo));
_streamedSequenceInfo = streamedDataInfo as StreamedSequenceInfo;
}
public virtual Expression HandleResultOperator(
EntityQueryModelVisitor entityQueryModelVisitor,
ResultOperatorBase resultOperator,
QueryModel queryModel)
{
Check.NotNull(entityQueryModelVisitor, "entityQueryModelVisitor");
Check.NotNull(resultOperator, "resultOperator");
Check.NotNull(queryModel, "queryModel");
var streamedDataInfo
= resultOperator.GetOutputDataInfo(entityQueryModelVisitor.StreamedSequenceInfo);
return
(Expression.Call(
_executeResultOperatorMethodInfo
.MakeGenericMethod(
entityQueryModelVisitor.StreamedSequenceInfo.ResultItemType,
streamedDataInfo.DataType),
entityQueryModelVisitor.Expression,
Expression.Constant(resultOperator),
Expression.Constant(entityQueryModelVisitor.StreamedSequenceInfo)));
}
public override void VisitResultOperator(ResultOperatorBase resultOperator, QueryModel queryModel, int index)
{
PreviousEvaluationType = CurrentEvaluationType;
CurrentEvaluationType = resultOperator.GetOutputDataInfo(PreviousEvaluationType);
if (resultOperator is ClientSideTransformOperator)
{
_serverSide = false;
}
else
{
if (!_serverSide)
{
throw new NotSupportedException("Processing server-side result operator after doing client-side ones. We've got the ordering wrong...");
}
}
ResultOperatorMap.Process(resultOperator, this, _hqlTree);
}
/// <summary>
/// Recalculates <see cref="SqlStatementBuilder.DataInfo"/> based on the <paramref name="resultOperator"/> and the
/// previous <paramref name="dataInfo"/>.
/// </summary>
protected void UpdateDataInfo(ResultOperatorBase resultOperator, SqlStatementBuilder sqlStatementBuilder, IStreamedDataInfo dataInfo)
{
sqlStatementBuilder.DataInfo = resultOperator.GetOutputDataInfo(dataInfo);
}
