Changelog
[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 :Labelfor creating label indices.Add
DROP INDEX ON :Labelfor dropping label indices.Add
DUMP DATABASEclause 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
EXPLAINis used.
Snapshot and write-ahead log format changed (not backward compatible).
indexInfo()function replaced withSHOW INDEX INFOsyntax.Removed support for unique index. Use unique constraints instead.
CREATE UNIQUE INDEX ON :label (property)replaced withCREATE CONSTRAINT ON (n:label) ASSERT n.property IS UNIQUE.Changed semantics for
COUNTERopenCypher function.
[Enterprise Ed.] Add new privilege,
STATSfor 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 INFOfeature.Add
PROFILEclause to openCypher.Add
CREATE CONSTRAINTclause to openCypher.Add
DROP CONSTRAINTclause to openCypher.Add
SHOW CONSTRAINT INFOfeature.Add
uniformSamplefunction 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
COALESCEfunction.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 INDEXfeature.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 INDEXclause to openCypher.Add
EXPLAINclause to openCypher.Add
inDegreeandoutDegreefunctions to openCypher.Improve BFS performance when both endpoints are known.
Add new
node-label,relationship-typeandquoteoptions tomg_import_csvtool.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
timestampfunction 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.
toStringfunction 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.
reduceandsinglefunctions added to openCypher.wShortestedge 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
MATCHwould stop matching if a result was empty, but laterresults 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 therewas no node
(:Label {prop: 1}), then theMATCHwouldn't even try to findfor
xbeing 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.
nodesandrelationshipsfunctions added.UNIONandUNION ALLis 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.
randfunction added.assertfunction added.counterandcounterSetfunctions added.indexInfofunction added.collectaggregation 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_thresholdflagEdges 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).
allfunction in openCypher.degreefunction in openCypher.User specified transaction execution timeout.
Concurrent
BUILD INDEXdeadlock now returns an error to the client.A
MATCHpreceeded byOPTIONAL MATCHexpansion 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.
