private Expression GetTupleExpression(ParameterizedExpression expression)
{
if (expression.OuterParameter == null)
{
return(tupleParameter);
}
var parameterOfTuple = context.GetTupleParameter(expression.OuterParameter);
if (tupleParameters.Contains(parameterOfTuple))
{
// Make access on Parameter<Tuple>
return(Expression.MakeMemberAccess(Expression.Constant(parameterOfTuple), WellKnownMembers.ParameterOfTupleValue));
}
// Use ApplyParameter for RecordSet predicates
if (itemMaterializationContextParameter == null)
{
var projectionExpression = context.Bindings[expression.OuterParameter];
var applyParameter = context.GetApplyParameter(projectionExpression);
var applyParameterExpression = Expression.Constant(applyParameter);
return(Expression.Property(applyParameterExpression, WellKnownMembers.ApplyParameterValue));
}
return(tupleParameter);
}
// Constructors
public ItemProjectorExpression(Expression expression, CompilableProvider dataSource, TranslatorContext context)
: base(ExtendedExpressionType.ItemProjector, expression.Type)
{
DataSource = dataSource;
Context = context;
var newApplyParameter = Context.GetApplyParameter(dataSource);
var applyParameterReplacer = new ExtendedExpressionReplacer(ex =>
ex is SubQueryExpression
? ((SubQueryExpression)ex).ReplaceApplyParameter(newApplyParameter)
: null);
Item = applyParameterReplacer.Replace(expression);
}