# Roadmap ## Q1 2019 - JOIN syntax compatible with SQL standard: - Mutliple `JOIN`s in single `SELECT` - Protobuf and Parquet input and output formats - 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-->