Redisgraph 2.8 Release Notes

Requirements

RedisGraph v2.8.26 requires:

• Minimum Redis compatibility version (database): 6.2.0
• Minimum Redis Enterprise Software version (cluster): 6.2.8

v2.8.26 (March 2023)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Bug fixes:

  • #2880 Potential crash when using WITH * expressions
  • #2917 Potential crash when using CASE expressions (MOD-4873)
  • #2836 Potential crash on *0 variable-length path (MOD-4817)
  • #2916 Potential crash when executing concurrent queries that utilize full-text indices (MOD-4818)

v2.8.25 (February 2023)

This is a maintenance release for RedisGraph 2.8.

Update urgency: MODERATE: Program an upgrade of the server, but it's not urgent.

Details:

• Bug fixes:

  • #2890 Potential wrong results on variable-length path

v2.8.24 (February 2023)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Bug fixes:

  • #2777, #2841 Potential crash when sending queries from multiple connections and timeout is not 0
  • #2844 Potential partial results when same parametrized query is running from multiple connections
  • #2739, #2774 Paths with exact variable length >1 are not matched

• Improvements:

  • #2758 Improved edge deletion performance

v2.8.21 (January 2023)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Bug fixes:

  • #2754 Partial sync may hang (MOD-4594)
  • #2695 Potential crash on certain write queries (MOD-4286, MOD-4545)
  • #2637, #2460, #2680 Crash on invalid queries
  • #2484 Indexes can be created on invalid property names
  • #2672 Wrong matching result on multiple labels
  • #2643 Duplicate reports when matching relationship type :R|R
  • #2687, #2414 Error when UNWINDing relationships
  • #2635 Cannot UNWIND an expression that is not a list
  • #2636 MERGE ... ON ... - cannot remove a property by setting it to null

• Improvements:

  • #2790 Improved performance by disabling SuiteSparse:GraphBLAS' global free pool
  • #2757 Improved performance of indegree and outdegree
  • #2740 Don’t show partial results for timed out GRAPH.PROFILE

v2.8.20 (September 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: MODERATE: Program an upgrade of the server, but it's not urgent.

Details:

• Bug fixes:

  • #2591 Potential crash trying to utilize a nonexistent index
  • #2558 Multi-relationship properties created before index creation are not indexed
  • #2571 min and max return wrong results when the argument is an array
  • #2587 Some queries generate a "forced unlocking commit flow" warning

• Improvements:

  • #2533 Graph slow log can be reset with GRAPH.SLOWLOG g RESET

v2.8.19 (August 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: MODERATE: Program an upgrade of the server, but it's not urgent.

Details:

• Bug fixes:

  • #2517 Crash on invalid REDUCE queries
  • #2525 toJSON - node labels are not separated with a comma (,)
  • #2467 Possibly wrong results when using a variable named anon_N
  • #2522 Deleting an edge index leaves traces
  • #2477 Cannot extract the latitude or the longitude of a point

• Improvements:

  • #2519 When a query is cached and then a relevant index is created, recalculate the execution plan

v2.8.17 (July 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Bug fixes:

  • #2499 Potential crash with concurrent connections due to missing lock - additional fixes
  • #2424 Potential crash when using ORDER BY
  • #2491 Whitespaces between MATCH terms can render the query invalid

v2.8.16 (July 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Bug fixes:

  • #2478 Potential crash with concurrent connections due to missing lock
  • #2370 Potential crash / wrong results / warning messages when using edge indexes
  • #2473 Crash on invalid distance() query with index

v2.8.15 (June 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Bug fixes:

  • #2241 Possible crash on queries with MERGE operation in a Cartesian product (MOD-3500)
  • #2394 Possible crash when freeing an index immediately after its creation

v2.8.14 (June 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Features:

  • #2403 Introduce toFloat function
  • #2365 Commands that don't execute on the main thread now also appear in [SLOWLOG]({{< relref "/commands/slowlog" >}})

• Bug fixes:

  • #2381 Rare data corruption on data encoding
  • #2393, #2395 Crash when searching an index for a runtime-determined value
  • #2377 Crash on INT_MIN % -1
  • #2390 Crash on distance filter
  • #2407 Crash on double to string
  • #2422 toJSON returned floating points cropped to 6 decimals

{{<note>}} New RDB version (v12). RDB files created with v2.8.14 or later are not backward compatible. {{</note>}}

v2.8.13 (May 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Bug fixes:

  • #2351 Potential memory leak on query timeout
  • #2348 Crash when converting certain Cypher queries to RediSearch queries
  • #2331 Two memory leaks (one on failed RDB loading, one on certain invalid queries)
  • #2328, #2306, #2307, #2326 Disallow redeclaration of variables; fixed false redeclaration errors
  • #2363 Nodes were sometimes created with more labels than those specified

v2.8.12 (May 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Bug fixes:

  • #2278, #2301 Potential crash on bulk update
  • #2262, #2271, #2272, #2273, #2282, #2288, #2299, #2312, #2321, #2325, #2323 Potential crash on certain queries
  • #1441 Query returns wrong result: projection before Cartesian product causes only one result to be returned
  • #2298 Query returns wrong result: wrong value when fetching a string property from a map
  • #2318 Memory leak

{{<note>}} Duplicate column names in a query are no longer valid. For example, the query GRAPH.QUERY g "MATCH (e) RETURN e, e" is not valid. If you need to return the same column twice, you can rewrite the query as GRAPH.QUERY g "MATCH (e) RETURN e, e as e2". {{</note>}}

v2.8.11 (March 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Bug fixes:

  • #2259, #2258 Fix memory leak and potential crash on [RDB]({{< relref "/operate/oss_and_stack/management/persistence" >}}) saving

v2.8.10 (March 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: HIGH: There is a critical bug that may affect a subset of users. Upgrade!

Details:

• Features:

  • #2245 Support graphs [eviction]({{< relref "/develop/reference/eviction" >}})

• Bug fixes:

  • #1493, #2240 Fixed crash on certain queries
  • #2229, #2222 Fixed crash on certain queries
  • #2209, #2228 Fixed crash on certain invalid DELETE queries
  • #2237, #2242 Fixed crash on certain PROFILE queries
  • #2230, #2232 Fixed wrong number of reported deleted relationships on certain queries
  • #2233 Certain valid queries were reported invalid
  • #2246 Fixed memory leaks

• Improvements:

  • #2235 Improved [RDB]({{< relref "/operate/oss_and_stack/management/persistence" >}}) loading performance

v2.8.9 (March 2022)

This is a maintenance release for RedisGraph 2.8.

Update urgency: MODERATE: Program an upgrade of the server, but it's not urgent.

Details:

• Features:

  • #2181, #2182 Full support for ARM builds

• Bug fixes:

  • #2167 Fixed a potential crash: filter placement in OPTIONAL subtrees
  • #2176 Fixed a potential crash: invalid memory access in nested DISTINCT functions
  • #2217 Fixed a potential crash: memory access after free on FLUSHALL
  • #2207 Fixed memory leak when MAX_QUEUED_QUERIES is used
  • #2220 WITH * WHERE - the WHERE filters were ignored
  • #2151 Return correct results for aggregations with no inputs
  • #2163 Emit error correctly on multi-query inputs

• Improvements:

  • #2173 Improve performance of breadth-first search

v2.8 GA (v2.8.8) (February 2022)

This is the General Availability release of RedisGraph 2.8.

Highlights

RedisGraph 2.8 introduces multi-labeled nodes, indexes over relationship properties, additional expressivity (construct, functions, and operators), major performance enhancements, and many bug fixes.

What's new in 2.8

• Multi-labeled nodes

  {{<note>}} The labels function's signature has changed. The function now returns a list of labels instead of a single label.

If you are using this function and upgrading to RedisGraph 2.8, a simple fix is to replace any call to labels(x) with labels(x)[0]. This returns the first label associated with node x. For uni-labeled nodes, the result in RedisGraph 2.8 is similar to the results of labels(x) in RedisGraph 2.4. {{</note>}}

• Indexes over relationship properties
• Enhanced full-text search
• Delta matrices: node and relationships additions and deletions are much faster, as they are first updated in small delta matrices. The main matrices are then bulk-updated.
• Additional Cypher construct, functions, and operators
• RediSearch 2.2.7
• SuiteSparse (GraphBLAS) 6.0.0

Details

• Features (since 2.8-M02):

  • #2109 Introduce allShortestPaths BFS function
  • #2099 Introduce keys function
  • #2047 Introduce reduce function
  • #2076 Introduce XOR operation in filter trees
  • #2088 Introduce pattern comprehensions
  • #2051 Allow copying of entity attribute sets in SET clauses
  • #2067 Allow modification of virtual key entity count (VKEY_MAX_ENTITY_COUNT) at runtime
  • #2102 New load time configuration option NODE_CREATION_BUFFER - see documentation (MOD-2348)
  • #2049 RediSearch supports field definitions

• Performance improvements (since 2.8-M02):

  • #2097 Locks favor writers to prevent write exhaustion
  • #1945 Track node count per label in graph statistics
  • #1872 Delta matrices are always hypersparse
  • #1871 Matrix sync policies reduce the number of syncs required
  • #1869 Transposed matrices are always boolean
  • #2101 Entity annotation has been replaced with an AST toString function
  • #1878 Slowlog queries no longer create graphs
  • #2067 Index graph entities incrementally on restore
  • Faster AOF recovery (PM-1252)

• Bug fixes (since 2.8-M02):

  • #2016 Implement new BFS algorithm
  • #2105 Creating a node with multiple properties using the same key only accepts the last value
  • #2055 Avoid arithmetic overflow in avg function
  • #2048 Modulo by zero emits division by zero error
  • #2020 Fix evaluation of variable-length edges in expression ordering
  • #2028 Fix utilization of record offset in procedure calls, refactor outputs
  • #2014 Update label for every node in the AST
  • #2002 Fix crash in index utilization using wrong query_graph
  • #1976 Use operand matrix when available
  • #1973 Emit error on a query that only contains parameters
  • #1950 Print ExecutionPlan in GRAPH.EXPLAIN only if no errors are encountered in the construction
  • #1933 Free thread-local data on graph deletion
  • #1942 Fix dimensions of transposed delta matrices
  • #1940 Do not use block client if deny blocking is specified
  • #1898 Error when setting a property to an array containing an invalid type
  • #1931 Sync matrices on parent process before serialization fork
  • #1897 Aliases in WITH ... ORDER BY must be valid references
  • #1913 Update thread-local AST for every cloned operation
  • #1915 Validate function references in parameters
  • #1911 Refactor cron task for managing query timeouts
  • #1902 Fix incorrect behavior on NULL values in CASE...WHEN expressions
  • #1904 Allow reconfiguring query timeout to 0
  • #1888 Synchronize matrices on creation in RDB load
  • #1892 Validate values specified in SET clauses
  • #1889 Tuple iterator now updates properly when changing matrix to serialize
  • #1870 Fix crash in range function
  • #2125 Fix crash on UNION ... RETURN * queries (MOD-2524)
  • #2043 Avoid serialization of duplicate graph keys
  • #2067 Numeric indices no longer lose precision on very large values
  • #2072, #2081 CRLF sequences embedded in strings no longer trigger a protocol error when being emitted
  • #2139 Fix crash when trying to retrieve an out-of-bounds item
  • #2149 Fix crash when matching a node engages an index to search for a value that is a RediSearch stop word