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Add changelog for version 1.1

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Reviewers: buda

Reviewed By: buda

Differential Revision: https://phabricator.memgraph.io/D2796
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Matej Ferencevic 2020-07-01 10:15:31 +02:00
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CHANGELOG.md
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# Change Log
## v1.1.0
### Major Features and Improvements
* Properties in nodes and edges are now stored encoded and compressed. This
change significantly reduces memory usage. Depending on the specific dataset,
total memory usage can be reduced up to 50%.
* Added support for rescanning query modules. Previously, the query modules
directory was scanned only upon startup. Now it is scanned each time the user
requests to load a query module. The functions used to load the query modules
were renamed to `mg.load()` and `mg.load_all()` (from `mg.reload()` and
`mg.reload_all()`).
* Improved execution performance of queries that have an IN list filter by
using label+property indices.
Example: `MATCH (n:Label) WHERE n.property IN [] ...`
* Added support for `ANY` and `NONE` openCypher functions. Previously, only
`ALL` and `SINGLE` functions were implemented.
### Bug Fixes and Other Changes
* Fixed invalid paths returned by variable expansion when the starting node and
destination node used the same symbol.
Example: `MATCH path = (n:Person {name: "John"})-[:KNOWS*]->(n) RETURN path`
* Improved semantics of `ALL` and `SINGLE` functions to be consistent with
openCypher when handling lists with `Null`s.
* `SHOW CONSTRAINT INFO` now returns property names as a list for unique
constraints.
* Escaped label/property/edgetype names in `DUMP DATABASE` to support names
with spaces in them.
* Fixed handling of `DUMP DATABASE` queries in multi-command transactions
(`BEGIN`, ..., `COMMIT`).
* Fixed handling of various query types in explicit transactions. For example,
constraints were allowed to be created in multi-command transactions
(`BEGIN`, ..., `COMMIT`) but that isn't a transactional operation and as such
can't be allowed in multi-command transactions.
* Fixed integer overflow bugs in `COUNT`, `LIMIT` and `SKIP`.
* Fixed integer overflow bugs in weighted shortest path expansions.
* Fixed various other integer overflow bugs in query execution.
* Added Marvel Comic Universe tutorial.
* Added FootballTransfers tutorial.
## v1.0.0
### Major Features and Improvements