[Enterprise Ed.] Remove support for Kafka streams.
Snapshot and write-ahead log format changed (not backward compatible).
Removed support for unique constraints.
Label indices aren't created automatically, create them explicitly instead.
Renamed several database flags. Please see the configuration file for a list of current flags.
[Enterprise Ed.] Add support for auth module.
[Enterprise Ed.] LDAP support migrated to auth module.
Implemented new graph storage engine.
Add support for disabling properties on edges.
Add support for existence constraints.
Add support for custom openCypher procedures using a C API.
Support loading query modules implementing read-only procedures.
Add CALL <procedure> YIELD <result>
syntax for invoking loaded procedures.
Add CREATE INDEX ON :Label
for creating label indices.
Add DROP INDEX ON :Label
for dropping label indices.
Add DUMP DATABASE
clause to openCypher.
Add functions for treating character strings as byte strings.
Fix several memory management bugs.
Reduce memory usage in query execution.
Fix bug that crashes the database when EXPLAIN
is used.
Snapshot and write-ahead log format changed (not backward compatible).
indexInfo()
function replaced with SHOW INDEX INFO
syntax.
Removed support for unique index. Use unique constraints instead.
CREATE UNIQUE INDEX ON :label (property)
replaced with CREATE CONSTRAINT ON (n:label) ASSERT n.property IS UNIQUE
.
Changed semantics for COUNTER
openCypher function.
[Enterprise Ed.] Add new privilege, STATS
for accessing storage info.
[Enterprise Ed.] LDAP authentication and authorization support.
[Enterprise Ed.] Add audit logging feature.
Add multiple properties unique constraint which replace unique indices.
Add SHOW STORAGE INFO
feature.
Add PROFILE
clause to openCypher.
Add CREATE CONSTRAINT
clause to openCypher.
Add DROP CONSTRAINT
clause to openCypher.
Add SHOW CONSTRAINT INFO
feature.
Add uniformSample
function to openCypher.
Add regex matching to openCypher.
Fix bug in query comment parsing.
Fix bug in query symbol table.
Fix OpenSSL memory leaks.
Make authentication case insensitive.
Remove COALESCE
function.
Add movie tutorial.
Add backpacking tutorial.
Fix bug in explicit transaction handling.
Fix bug in edge filtering by edge type and destination.
Write-ahead log format changed (not backward compatible).
[Enterprise Ed.] Reduce memory usage in distributed usage.
Add DROP INDEX
feature.
Improve SSL error messages.
[Enterprise Ed.] Fix issues with reading and writing in a distributed query.
Correctly handle an edge case with unique constraint checks.
Fix a minor issue with mg_import_csv
.
Fix an issue with EXPLAIN
.
Write-ahead log format changed (not backward compatible).
Snapshot format changed (not backward compatible).
[Enterprise Ed.] Authentication and authorization support.
[Enterprise Ed.] Kafka integration.
[Enterprise Ed.] Support dynamic worker addition in distributed.
Reduce memory usage and improve overall performance.
Add CREATE UNIQUE INDEX
clause to openCypher.
Add EXPLAIN
clause to openCypher.
Add inDegree
and outDegree
functions to openCypher.
Improve BFS performance when both endpoints are known.
Add new node-label
, relationship-type
and quote
options to
mg_import_csv
tool.
Reduce memory usage of mg_import_csv
.
[Enterprise Ed.] Fix an edge case in distributed index creation.
[Enterprise Ed.] Fix issues with Cartesian in distributed queries.
Correctly handle large messages in Bolt protocol.
Fix issues when handling explicitly started transactions in queries.
Allow openCypher keywords to be used as variable names.
Revise and make user visible error messages consistent.
Improve aborting time consuming execution.
Snapshot format changed (not backward compatible).
Improved Id Cypher function.
Added string functions to openCypher (lTrim
, left
, rTrim
, replace
,
reverse
, right
, split
, substring
, toLower
, toUpper
, trim
).
Added timestamp
function to openCypher.
Added support for dynamic property access with []
operator.
[Enterprise Ed.] Improve Cartesian support in distributed queries.
[Enterprise Ed.] Improve distributed execution of BFS.
[Enterprise Ed.] Dynamic graph partitioner added.
Static nodes/edges id generators exposed through the Id Cypher function.
Properties on disk added.
Telemetry added.
SSL support added.
toString
function added.
Document issues with Docker on OS X.
Add BFS and Dijkstra's algorithm examples to documentation.
Snapshot format changed (not backward compatible).
[Enterprise Ed.] Distributed storage and execution.
reduce
and single
functions added to openCypher.
wShortest
edge expansion added to openCypher.
Support packaging RPM on CentOS 7.
Report an error if updating a deleted element.
Log an error if reading info on available memory fails.
Fix a bug when MATCH
would stop matching if a result was empty, but later
results still contain data to be matched. The simplest case of this was the
query: UNWIND [1,2,3] AS x MATCH (n :Label {prop: x}) RETURN n
. If there
was no node (:Label {prop: 1})
, then the MATCH
wouldn't even try to find
for x
being 2 or 3.
Report an error if trying to compare a property value with something that
cannot be stored in a property.
Fix crashes in some obscure cases.
Commit log automatically garbage collected.
Add minor performance improvements.
Snapshot format changed (not backward compatible).
Snapshot configuration flags changed, general durability flags added.
Write-ahead log added.
nodes
and relationships
functions added.
UNION
and UNION ALL
is implemented.
Concurrent index creation is now enabled.
CASE construct (without aggregations).
Named path support added.
Maps can now be stored as node/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.
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.
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.
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.
AST caching.
Label + property index support.
Different logging setup & format.
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.
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.
List indexing supported with preceeding IN (for example in query RETURN 1 IN [[1,2]][0]
).
RETURN , count(), OPTIONAL MATCH, UNWIND, DISTINCT (except DISTINCT in aggregate functions), list indexing and slicing, escaped labels, IN LIST operator, range function.
TCP_NODELAY -> import should be faster.
Clear hint bits.
SKIP, LIMIT, ORDER BY.
Math functions.
Initial support for MERGE clause.
Unhandled Lock Timeout Exception.