```
touch /tmp/aaa.csv

CREATE TABLE log (A String) ENGINE= FileLog('/tmp/aaa.csv', 'CSV');
DB::Exception: The absolute data path should be inside `user_files_path`(/var/lib/clickhouse/user_files/). (BAD_ARGUMENTS)


CREATE TABLE log (A String) ENGINE= FileLog('/tmp/aaa.csv', 'CSV');
DB::Exception: Metadata files already exist by path: /var/lib/clickhouse/.filelog_storage_metadata/default/log, remove them manually if it is intended. (TABLE_METADATA_ALREADY_EXISTS)
```
{
    std::lock_guard<std::mutex> lock(file_infos_mutex);
    if (running_streams)
    {
        LOG_INFO(log, "Another select query is running on this table, need to wait it finish.");
        return true;
    }
    Stopwatch watch;
    auto table_id = getStorageID();
    auto table = DatabaseCatalog::instance().getTable(table_id, getContext());
    if (!table)
        throw Exception("Engine table " + table_id.getNameForLogs() + " doesn't exist", ErrorCodes::LOGICAL_ERROR);
    auto metadata_snapshot = getInMemoryMetadataPtr();
    auto max_streams_number = std::min<UInt64>(filelog_settings->max_threads.value, file_infos.file_names.size());
    
    if (max_streams_number == 0)
    {
        LOG_INFO(log, "There is a idle table named {}, no files need to parse.", getName());
        return updateFileInfos();
    }
    
    auto insert = std::make_shared<ASTInsertQuery>();
    insert->table_id = table_id;
    auto new_context = Context::createCopy(getContext());
    InterpreterInsertQuery interpreter(insert, new_context, false, true, true);
    auto block_io = interpreter.execute();