arg2, arg3 = e.Arg2, e.Arg3
	}

	// Evaluate the FROM argument
	v2, err := arg2.evalNode(r, tableAlias)
	if err != nil {
		return nil, err
	}
	inferTypeForArithOp(v2)
	startIdx, ok := v2.ToInt()
	if !ok {
		err := fmt.Errorf("Incorrect type for start index argument in %s", sqlFnSubstring)
		return nil, errIncorrectSQLFunctionArgumentType(err)
	}

	length := -1
	// Evaluate the optional FOR argument

func (r *Record) Set(name string, value *sql.Value) (sql.Record, error) {
	var v interface{}
	if b, ok := value.ToBool(); ok {
		v = b
	} else if f, ok := value.ToFloat(); ok {
		v = f
	} else if i, ok := value.ToInt(); ok {
		v = i
	} else if t, ok := value.ToTimestamp(); ok {
		v = sql.FormatSQLTimestamp(t)
	} else if s, ok := value.ToString(); ok {
		v = s
	} else if value.IsNull() {
		v = nil
	} else if value.IsMissing() {

		return errArithMismatchedTypes
	}

	// In case of first row, set v to a.
	if isFirstRow {
		intA, okI := a.ToInt()
		if okI {
			v.setInt(intA)
			return nil
		}
		floatA, _ := a.ToFloat()
		v.setFloat(floatA)
		return nil
	}

	intV, ok1i := v.ToInt()
	intA, ok2i := a.ToInt()
	if ok1i && ok2i {
		result := intV
		if !isMax {
			if intA < result {
				result = intA
			}