NebulaGraph Community Edition

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 crash caused by encoding the parameter expression and evaluating it in the storage. #5336

• Fix the crash of some list functions. #5383

• 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 off by default. #5119

• Modify the default value of local_config in the configuration file to true. #5119

• Consistent use of v.tag.property to get property values, because it is necessary to specify the Tag. Using v.property to access the property of a Tag on v was incorrectly allowed in the previous version. #5230

• Remove the column HTTP port from the command SHOW HOSTS. #5056

• Disable the queries of the form OPTIONAL MATCH <pattern> WHERE <condition>. #5273

• Disable TOSS. #5119

• Rename Listener's pid filename and log directory name. #5119

Notes for upgrading

To upgrade to v3.4.0, follow the upgrade guide:

• Upgrade NebulaGraph from v2.x to v3.4.0

• Upgrade NebulaGraph from v3.x to v3.4.0