**Summary** Optimize JSON read performance by implementing Virtual Column and JSONB binary format related #5925 ## Task list - [x] [RFC](https://github.com/datafuselabs/databend/pull/6995) - [ ] FPGrowth algorithm for statistics - [x] Extract virtual columns - [x] Push down JSON key path access - [x] https://github.com/datafuselabs/databend/issues/7668