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Add changelog for version 1.0

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Reviewers: buda

Reviewed By: buda

Differential Revision: https://phabricator.memgraph.io/D2750
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Matej Ferencevic 2020-04-02 19:51:24 +02:00
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CHANGELOG.md
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# Change Log
## v1.0.0
### Major Features and Improvements
* [Enterprise Ed.] Exposed authentication username/rolename regex as a flag
(`--auth-user-or-role-name-regex`).
* [Enterprise Ed.] Improved auth module error handling and added support for
relative paths.
* Added support for Python query modules. This release of Memgraph supports
query modules written using the already existing C API and the new Python
API.
* Added support for unique constraints. The unique constraint is created with a
label and one or more properties.
* Implemented support for importing CSV files (`mg_import_csv`). The importer
is compatible with the Neo4j batch CSV importer.
* Snapshot and write-ahead log format changed (backward compatible with v0.50).
* Vertices looked up by their openCypher ID (`MATCH (n) WHERE ID(n) = ...`)
will now find the node in O(logn) instead of O(n).
* Improved planning of BFS expansion, a faster, specific approach is now
favored instead of a ScanAll+Filter operation.
* Added syntax for limiting memory of `CALL`.
* Exposed server name that should be used for Bolt handshake as flag
(`--bolt-server-name-for-init`).
* Added several more functions to the query module C API.
* Implemented a storage locking mechanism that prevents the user from
concurrently starting two Memgraph instances with the same data directory.
### Bug Fixes and Other Changes
* [Enterprise Ed.] Fixed a bug that crashed the database when granting
privileges to a user.
* [Enterprise Ed.] Improved Louvain algorithm for community detection.
* Type of variable expansion is now printed in `EXPLAIN` (e.g. ExpandVariable,
STShortestPath, BFSExpand, WeightedShortestPath).
* Correctly display `CALL` in `EXPLAIN` output.
* Correctly delimit arguments when printing the signature of a query module.
* Fixed a planning issue when `CALL` preceded filtering.
* Fixed spelling mistakes in the storage durability module.
* Fixed storage GC indices/constraints subtle race condition.
* Reduced memory allocations in storage API and indices.
* Memgraph version is now outputted to `stdout` when Memgraph is started.
* Improved RPM packaging.
* Reduced number of errors reported in production log when loading query
modules.
* Removed `early access` wording from the Community Offering license.
## v0.50.0
### Breaking Changes