result.combine(arg.analyze(s))
		}
		return result

	case sqlFnCharLength, sqlFnCharacterLength:
		if len(e.SFunc.ArgsList) != 1 {
			return qProp{err: fmt.Errorf("%s needs exactly 2 arguments", string(funcName))}
		}
		for _, arg := range e.SFunc.ArgsList {
			result.combine(arg.analyze(s))
		}
		return result

	case sqlFnLower, sqlFnUpper:
		if len(e.SFunc.ArgsList) != 1 {

	case sqlFnDateDiff:
		return handleDateDiff(r, e.DateDiff, tableAlias)
	}

	// For all simple argument functions, we evaluate the arguments here
	argVals := make([]*Value, len(e.SFunc.ArgsList))
	for i, arg := range e.SFunc.ArgsList {
		argVals[i], err = arg.evalNode(r, tableAlias)
		if err != nil {
			return nil, err
		}
	}

	switch e.getFunctionName() {
	case sqlFnCoalesce:
		return coalesce(argVals)