private IProjection DatePartMethod(DatePartMethod method, Expression[] arguments, string function)
{
return(new SqlFunctionProjection(
function,
NHibernateUtil.Int32,
ProjectionVisitor.CreateProjection(arguments[0])
));
}
private Expression NormalizeDatePart(DatePartMethod method, LiteralExpression[] arguments)
{
if (LiteralUtil.IsAnyNull(arguments))
{
return(new LiteralExpression(null, LiteralType.Null));
}
else if (arguments[0].LiteralType != LiteralType.DateTime)
{
throw new ODataException(String.Format(
ErrorMessages.Method_InvalidArgumentType,
method.MethodType, 1, "Edm.DateTime"
));
}
else
{
var argument = (DateTime)arguments[0].Value;
int result;
switch (method.MethodType)
{
case MethodType.Year: result = argument.Year; break;
case MethodType.Month: result = argument.Month; break;
case MethodType.Day: result = argument.Day; break;
case MethodType.Hour: result = argument.Hour; break;
case MethodType.Minute: result = argument.Minute; break;
case MethodType.Second: result = argument.Second; break;
default: throw new NotSupportedException();
}
return(new LiteralExpression(result, LiteralType.Int));
}
}