# Change Log

## Next version number (v0.6.0 -> two new features AST cache + Label-Property Index)

### Major Features and Improvements

* AST Caching (TODO write more details)
* Label + Property Index support (TODO write more details)
* Different Logging Setup & Format (TODO write more details)

## v0.5.0

### Major Features and Improvements

* Use label indexes to speed up querying.
* Generate multiple query plans and use the cost estimator to select the best.
* Snapshots & Recovery.
* Abandon old yaml configuration and migrate to gflags.
* Query stripping & AST caching support.

### Bug Fixes and Other Changes

* Fixed race condition in MVCC. Hints exp+aborted race condition prevented.
* Fixed conceptual bug in MVCC GC. Evaluate old records w.r.t. the oldest
  transaction's id AND snapshot.
* User friendly error messages thrown from the query engine.

## Build 837

### Bug Fixes and Other Changes

* List indexing supported with preceeding IN (for example in query `RETURN 1 IN [[1,2]][0]`)

## Build 825

### Major Features and Improvements

* RETURN *, count(*), OPTIONAL MATCH, UNWIND, DISTINCT (except DISTINCT in aggregate functions), list indexing and slicing, escaped labels, IN LIST operator, range function

### Bug Fixes and Other Changes

* TCP_NODELAY -> import should be faster
* Clear hint bits

## Build 783

### Major Features and Improvements

* SKIP, LIMIT, ORDER BY
* Math functions
* Initial support for MERGE clause

### Bug Fixes and Other Changes

* Unhandled Lock Timeout Exception

## Build 755

### Major Features and Improvements

* MATCH, CREATE, WHERE, SET, REMOVE, DELETE