inferTypeAsString(arg)

	s, ok := arg.ToString()
	if !ok {
		err := errLikeNonStrArg
		return nil, errLikeInvalidInputs(err)
	}

	pattern, err1 := e.Pattern.evalNode(r, tableAlias)
	if err1 != nil {
		return nil, err1
	}

	// Infer pattern as string (in case it is untyped)
	inferTypeAsString(pattern)

	patternStr, ok := pattern.ToString()
	if !ok {
		err := errLikeNonStrArg

)

// toString - Safely convert interface to string without causing panic.
func toString(val interface{}) string {
	switch v := val.(type) {
	case string:
		return v
	default:
		return ""
	}
}

// toLowerString - safely convert interface to lower string
func toLowerString(val interface{}) string {
	return strings.ToLower(toString(val))
}