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8bbf1af525
memgraph/CHANGELOG.md
florijan 8bbf1af525 Cleanup durability config, docs, CHANGELOG 
Reviewers: teon.banek, buda, mislav.bradac, dgleich

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D992
2017-11-21 10:17:13 +01:00

3.2 KiB
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Change Log

Next release

Breaking Changes

  • Snapshot format changed (not backward compatible).
  • Snapshot configuration flags changed, general durability flags added.

Major Features and Improvements

  • Write-ahead log added.
  • nodes and relationships functions added.

Bug Fixes and Other Changes

v0.8.0

Major Features and Improvements

  • CASE construct (without aggregations).
  • Named path support added.
  • Maps can now be stored as vertex/edge properties.
  • Map indexing supported.
  • rand function added.
  • assert function added.
  • counter and counterSet functions added.
  • indexInfo function added.
  • collect aggregation now supports Map collection.
  • Changed the BFS syntax.

Bug Fixes and Other Changes

  • Use \u to specify 4 digit codepoint and \U for 8 digit
  • Keywords appearing in header (named expressions) keep original case.
  • Our Bolt protocol implementation is now completely compatible with the protocol version 1 specification. (https://boltprotocol.org/v1/)
  • Added a log warning when running out of memory and the memory_warning_threshold flag
  • Edges are no longer additionally filtered after expansion.

v0.7.0

Major Features and Improvements

  • Variable length path MATCH.
  • Explicitly started transactions (multi-query transactions).
  • Map literal.
  • Query parameters (except for parameters in place of property maps).
  • all function in openCypher.
  • degree function in openCypher.
  • User specified transaction execution timeout.

Bug Fixes and Other Changes

  • Concurrent BUILD INDEX deadlock now returns an error to the client.
  • A MATCH preceeded by OPTIONAL MATCH expansion inconsistencies.
  • High concurrency Antlr parsing bug.
  • Indexing improvements.
  • Query stripping and caching speedups.

v0.6.0

Major Features and Improvements

  • AST caching.
  • Label + property index support.
  • Different logging setup & format.

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.