protected override Expression VisitFunctionCall(SqlFunctionCallExpression functionCallExpression)
{
if (this.inProjector)
{
return(functionCallExpression);
}
if (functionCallExpression.Arguments.Count == 1 &&
(functionCallExpression.Function == SqlFunction.IsNotNull || functionCallExpression.Function == SqlFunction.IsNull) &&
(functionCallExpression.Arguments[0].NodeType == ExpressionType.MemberInit || functionCallExpression.Arguments[0].NodeType == (ExpressionType)SqlExpressionType.ObjectReference))
{
Expression retval = null;
foreach (var value in ObjectOperandComparisonExpander.GetPrimaryKeyElementalExpressions(functionCallExpression.Arguments[0]))
{
var current = new SqlFunctionCallExpression(functionCallExpression.Type, functionCallExpression.Function, value);
if (retval == null)
{
retval = current;
}
else
{
retval = Expression.And(retval, current);
}
}
return(retval);
}
return(base.VisitFunctionCall(functionCallExpression));
}
public static Expression Expand(Expression expression)
{
var expander = new ObjectOperandComparisonExpander();
return expander.Visit(expression);
}
public static Expression Expand(Expression expression)
{
var expander = new ObjectOperandComparisonExpander();
return(expander.Visit(expression));
}