**Describe the bug**

Table schema:
> mysql> show create table name\G
> 
> *************************** 1. row ***************************
>        Table: name
> Create Table: CREATE TABLE `name` (
>   `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
>   `username` varchar(40) DEFAULT NULL,
>   `1m_10m` smallint(6) DEFAULT NULL,
>   PRIMARY KEY (`id`)
> ) ENGINE=InnoDB AUTO_INCREMENT=178 DEFAULT CHARSET=latin1

When doing DB creation:

>  CREATE DATABASE clickhouse_test ENGINE = MaterializeMySQL('192.168.153.132:3306', 'clickhouse_test', 'root', 'password');

Got error message:

> Code: 62. DB::Exception: Received from 192.168.153.132:9000. DB::Exception: Syntax error: failed at position 80 ('1m_10m'): 1m_10m) VALUES. Wrong number.

if (pos > begin
                && (!(pos + 1 < end && isNumericASCII(pos[1]))
                    || prev_significant_token_type == TokenType::ClosingRoundBracket
                    || prev_significant_token_type == TokenType::ClosingSquareBracket
                    || prev_significant_token_type == TokenType::BareWord
                    || prev_significant_token_type == TokenType::QuotedIdentifier
                    || prev_significant_token_type == TokenType::Number))
                return Token(TokenType::Dot, token_begin, ++pos);
            ++pos;
            while (pos < end && isNumericASCII(*pos))
                ++pos;
            
            if (pos + 1 < end && (*pos == 'e' || *pos == 'E'))
            {
                ++pos;
                
                if (pos + 1 < end && (*pos == '-' || *pos == '+'))
                    ++pos;
                while (pos < end && isNumericASCII(*pos))
                    ++pos;
            }
            return Token(TokenType::Number, token_begin, pos);
        }
        case '+':
            return Token(TokenType::Plus, token_begin, ++pos);
        case '-':   
        {
            ++pos;
            if (pos < end && *pos == '>')