public override DbExpression Visit(DbIsNullExpression expression)
{
EntityUtil.CheckArgumentNull(expression, "expression");
return(VisitUnary(expression, exp =>
{
if (TypeSemantics.IsRowType(exp.ResultType))
{
//
return CqtBuilder.CreateIsNullExpressionAllowingRowTypeArgument(exp);
}
else
{
return CqtBuilder.IsNull(exp);
}
}
));
}