Function writeCommonErrorMessage

src/Parsers/parseQuery.cpp:133–172

void writeCommonErrorMessage(
    WriteBuffer & out,
    const char * begin,
    const char * end,
    Token last_token,
    const std::string & query_description)
{
    out << "Syntax error";

    if (!query_description.empty())
        out << " (" << query_description << ")";

    out << ": failed at position " << (last_token.begin - begin + 1);

    if (last_token.type == TokenType::EndOfStream || last_token.type == TokenType::Semicolon)
    {
        out << " (end of query)";
    }
    else
    {
        /// Do not print too long tokens.
        size_t token_size_bytes = last_token.end - last_token.begin;
        size_t token_preview_size_bytes = UTF8::computeBytesBeforeWidth(
            reinterpret_cast<const UInt8 *>(last_token.begin), token_size_bytes, 0, SHOW_CHARS_ON_SYNTAX_ERROR);

        out << " (" << std::string(last_token.begin, token_preview_size_bytes)
            << (token_preview_size_bytes < token_size_bytes ? "..." : "") << ")";
    }

    /// If query is multiline.
    const char * nl = find_first_symbols<'\n'>(begin, end);
    if (nl + 1 < end)
    {
        size_t line = 0;
        size_t col = 0;
        std::tie(line, col) = getLineAndCol(begin, last_token.begin);

        out << " (line " << line << ", col " << col << ")";
    }
}


std::string getSyntaxErrorMessage(