**Use case**
mysql repl to clickhouse

**Describe the solution you'd like**
Hope MaterializeMySQL engine can support MySQL prefix index



extern const int EMPTY_LIST_OF_COLUMNS_PASSED;
}
namespace MySQLInterpreter
{
static inline String resolveDatabase(
    const String & database_in_query, const String & replica_mysql_database, const String & replica_clickhouse_database, const Context & context)
{
    if (!database_in_query.empty())
    {
        if (database_in_query == replica_mysql_database)
        {
            
            
            return replica_clickhouse_database;
        }
        else
        {
            
            
            return "";
        }
    }
    
    
    
    
    const String & current_database = context.getCurrentDatabase();
    return current_database != replica_clickhouse_database ? "" : replica_clickhouse_database;
}
static inline NamesAndTypesList getColumnsList(ASTExpressionList * columns_define)