nebula

Features

• Enhance the full-text index. #5567 #5575 #5577 #5580 #5584 #5587

Optimizations

• Support variables when querying vertex id or property index in a match clause. #5486 #5553
• Support parallel startup of RocksDB instances to speed up the startup of the Storage service. #5521
• Optimize the prefix search performance of the RocksDB iterator after the DeleteRange operation. #5525
• Optimize the appendLog sending logic to avoid impacting write performance when a follower is down. #5571
• Optimize the performance of the MATCH statement when querying for non-existent properties. #5634

Bug fixes

• Fix the bug of meta data inconsistency. #5517
• Fix the bug that RocksDB ingest causes the leader lease to be invalid. #5534
• Fix the error in the statistics logic of storage. #5547
• Fix the bug that causes the web service to crash if a flag is set for an invalid request parameter. #5566
• Fix the bug that too many logs are printed when listing sessions. #5618
• Fix the crash of the Graph service when executing a single big query. #5619
• Fix the crash of the Graph service when executing the Find All Path statement. #5621 #5640
• Fix the bug that some expired data is not recycled at the bottom level. #5447 #5622
• Fix the bug that adding a path variable in the MATCH statement causes the all() function push-down optimization to fail. #5631
• Fix the bug in the MATCH statement that returns incorrect results when querying the self-loop by the shortest path. #5636
• Fix the bug that deleting edges by pipe causes the Graph service to crash. #5645
• Fix the bug in the MATCH statement that returns missing properties of edges when matching multiple hops. #5646

Changes

Enhance full-text index features with the following changes:

• The original full-text indexing function has been changed from calling ElasticSearch's Term-level queries to Full text queries.
• In addition to supporting wildcards, regulars, fuzzy matches, etc. (but the syntax has been changed), support for word splitting (relying on ElasticSearch's own word splitter) has been added, and the query results include scoring results. For more syntax,

Features

• Support UDF. #4804 #5391
• Support expressions like v.tag in return statements. #5440
• Support json_extract function in UPDATE statements. #5457
• Support TCK format in EXPLAIN output. #5414
• DML supports parameters. #5328

Optimizations

• Support TTL in milliseconds. #5430
• Enhance attribute trimming in aggregation functions. #5301
• Improve the performance of traversal executor. #5308
• Optimize FIND ALL PATH performance. #5409
• Removes some Raft locks to improve performance. #5451
• Optimize predicate function filtering for variable-length edges. #5464 #5470 #5481 #5503
• Parallel traversal executor. #5314
• MATCH supports ID collection. #5360
• Refactor the GO planner. #5369
• Add some Graph performance options in the configuration file. #5463
• Add maximum connection number flag. #5309

Bug fixes

• Fix the defect where RocksDB data import invalidates the leader lease. #5271
• Fix the error message when DESC USER does not exist. #5345
• Fix the defect where CREATE IF NOT EXIST fails when SPACE exists. #5375
• Fix the incorrect edge direction in GetNeighbors plan. #5386
• Fix the client IP format in the SHOW SESSIONS command. #5388
• Fix the defect where attributes are pruned in USE and MATCH. #5263
• Fix the defect where the filter is not pushed down in some cases. #5395
• Fix the defect where the filter is incorrectly filtered in some cases. #5422
• Fix the incorrect handling of internal variables in pattern expressions. #5424
• Fix defects involving EMPTY comparisons. #5433
• Fix the defect where duplicate columns are returned when all columns are requested in MATCH. #5443
• Fix the error in comparing paths involving reflexive edges. #5444
• Fix the defect of redefining aliases in a MATCH path. #5446
• Fix the type check defect when inse

Bug fixes:

• Fixed the crash caused by encoding the parameter expression and evaluating it in the storage. https://github.com/vesoft-inc/nebula/pull/5336
• Fixed the crash of some list functions. https://github.com/vesoft-inc/nebula/pull/5383

Feature

• Support killing sessions. #5146
• Support Memory Tracker to optimize memory management. #5082

Enhancement

• Optimize job management. #5212 #5093 #5099 #4872

• Modify the default value of the Graph service parameter session_reclaim_interval_secs to 60 seconds. #5246

• Adjust the default level of stderrthreshold in the configuration file. #5188

• Optimize the full-text index. #5077 #4900 #4925

• Limit the maximum depth of the plan tree in the optimizer to avoid stack overflows. #5050

• Optimize the treatment scheme when the pattern expressions are used as predicates. #4916

Bugfix

• Fix the bug about query plan generation and optimization. #4863 #4813

• Fix the bugs related to indexes:

  • Full-text indexes #5214 #5260
  • String indexes #5126

• Fix the bugs related to query statements:

  • Variables #5192
  • Filter conditions and expressions #4952 #4893 #4863
  • Properties of vertices or edges #5230 #4846 #4841 #5238
  • Functions and aggregations #5135 #5121 #4884
  • Using illegal data types #5242
  • Clauses and operators #5241 #4965

• Fix the bugs related to DDL and DML statements:

  • ALTER TAG #5105 #5136
  • UPDATE #4933

• Fix the bugs related to other functions:

  • TTL #4961
  • Authentication #4885
  • Services #4896

Change

• The added property name can not be the same as an existing or deleted property name, otherwise, the operation of adding a property fails. #5130
• Limit the type conversion when modifying the schema. #5098
• The default value must be specified when creating a property of type NOT NULL. #5105
• Add the multithreaded query parameter query_concurrently to the configuration file with a default value of true. #5119
• Remove the parameter kv_separation of the KV separation storage function from the configuration file, which is turned of