Function setSettingReplacementQuery

src/Server/MySQLHandler.cpp:149–156

}

static std::optional<String> setSettingReplacementQuery(const String & query, const String & mysql_setting, const String & clickhouse_setting)
{
    const String prefix = "SET " + mysql_setting;
    // if (query.length() >= prefix.length() && boost::iequals(std::string_view(prefix), std::string_view(query.data(), 3)))
    if (checkShouldReplaceQuery(query, prefix))
        return "SET " + clickhouse_setting + String(query.data() + prefix.length());
    return std::nullopt;
}

/// Replace "KILL QUERY [connection_id]" into "KILL QUERY WHERE query_id LIKE 'mysql:[connection_id]:xxx'".
static String killConnectionIdReplacementQuery(const String & query)