public override Expression Visit(Expression node)
{
switch (node)
{
case EnumerableRelationalQueryExpression enumerableRelationalQueryExpression:
{
var selectExpression = enumerableRelationalQueryExpression.SelectExpression;
var commandBuilderLambda = queryTranslatingExpressionVisitorFactory.Create().Translate(selectExpression);
var sequenceType = node.Type.GetSequenceType();
var materializer = Visit(materializerGeneratingExpressionVisitor.Visit(selectExpression));
return(Expression.Call(
(enumerableRelationalQueryExpression.TransformationMethod
?? asQueryableMethodInfo.MakeGenericMethod(sequenceType)),
Expression.Call(
executionContextParameter,
executeEnumerableMethodInfo.MakeGenericMethod(sequenceType),
commandBuilderLambda,
materializer)));
}
case SingleValueRelationalQueryExpression singleValueRelationalQueryExpression:
{
var selectExpression = singleValueRelationalQueryExpression.SelectExpression;
var commandBuilderLambda = queryTranslatingExpressionVisitorFactory.Create().Translate(selectExpression);
var materializer = Visit(materializerGeneratingExpressionVisitor.Visit(selectExpression));
return(singleValueRelationalQueryExpression.Type.IsScalarType()
? Expression.Call(
executionContextParameter,
executeScalarMethodInfo.MakeGenericMethod(node.Type),
commandBuilderLambda)
: Expression.Call(
executionContextParameter,
executeComplexMethodInfo.MakeGenericMethod(node.Type),
commandBuilderLambda,
materializer));
}
default:
{
return(base.Visit(node));
}
}
}
