# Roadmap

## Q4 2018

- JOIN syntax compatible with SQL standard:
    - Mutliple `JOIN`s in single `SELECT`
- Protobuf and Parquet input and output formats

## Q1 2019

- Import/export from HDFS and S3
- Lower metadata size in ZooKeeper
- Adaptive index granularity for MergeTree engine family

## Q2 2019

- JOIN execution improvements:
    - Distributed join not limited by memory
- Resource pools for more precise distribution of cluster capacity between users

## Q3 2019

- Fine-grained authorization
- Integration with external authentication services

[Original article](https://clickhouse.yandex/docs/en/roadmap/) <!--hide-->