public override Argument VisitFldlenExpression(CalcParser.FldlenExpressionContext context)
{
Argument arg = Visit(context.expression());
if (arg.IsNull)
{
return(Argument.Null);
}
if (arg.IsDouble || arg.IsDate)
{
throw new ArgumentCastException("Argument of $FLDLEN macro should not be a number or a date");
}
string fieldName = arg.ToString();
Argument sArg = this._resolver.ResolveFieldValue(fieldName);
if (sArg.IsNull)
{
return(new Argument(0));
}
int length = sArg.ToString().Length;
return(new Argument(length));
}
public override Query VisitFldlenExpression(CalcParser.FldlenExpressionContext context)
{
Query fieldQuery = Visit(context.expression());
string fieldName = fieldQuery.Text;
FieldInfo fieldInfo = this._metadataResolver.GetField(fieldName);
string queryText = this._dbTranslator.FieldLength(fieldInfo);
return(new Query(queryText, ResultType.Number));
}
