NebulaGraph Community Edition

Enhancement

• Optimized the performance of k-hop. #4560 #4736 #4566 #4582 #4558 #4556 #4555 #4516 #4531 #4522 #4754 #4762

• Optimized GO statement join performance. #4599 #4750

• Supported using GET SUBGRAPH to filter vertices. #4357

• Supported using GetNeighbors to filter vertices. #4671

• Optimized the loop handling of FIND SHORTEST PATH. #4672

• Supported the conversion between timestamp and date time. #4626

• Supported the reference of local variable in pattern expressions. #4498

• Optimized the job manager. #4446 #4442 #4444 #4460 #4500 #4633 #4654 #4663 #4722 #4742

• Added flags of experimental features, enable_toss for TOSS and enable_data_balance for BALANCE DATA. #4728

• Stats log print to console when the process is started. #4550

• Supported the JSON_EXTRACT function. #4743

Bugfix

• Fixed the crash of variable types collected. #4724

• Fixed the crash in the optimization phase of multiple MATCH. #4780

• Fixed the bug of aggregate expression type deduce. #4706

• Fixed the incorrect result of the OPTIONAL MATCH statement to
  give an error message, because the WHERE clause of the OPTIONAL MATCH statement
  references variables defined by other MATCH statements that was not supported. #4670

• Fixed the bug of parameter expression in the LOOKUP statement. #4664

• Fixed the bug that YIELD DISTINCT returned a distinct result set in the LOOKUP statement. #4651

• Fixed the bug that ColumnExpression encode and decode are not matched. #4413

• Fixed the bug that id($$) filter was incorrect in the GO statement. #4768

• Fixed the bug that full scan of MATCH statement when there is a relational In predicate. #4748

• Fixed the optimizer error of MATCH statement.#4771

• Fixed wrong output when using pattern expression as the filter in MATCH statement. #4778

• Fixed the bug that tag, edge, tag index and edge index display incorrectly. #4616

• Fixed the bug of date time format. #4524

• Fixed the bug that the return value of the date time vertex was changed. #4448

• Fixed the bug that the startup service failed when the log directory not existed and enable_breakpad was enabled. #4623

• Fixed the bug that after the metad stopped, the status remained online. #4610

• Fixed the corruption of the log file. #4409

• Fixed the bug that ENABLE_CCACHE option didn't work. #4648

• Abandoned uppercase letters in full-text index names. #4628

• Disable COUNT(DISTINCT *) . #4553

Change

• Vertices without tags are not supported by default.
  If you want to use the vertex without tags, add --graph_use_vertex_key=true
  to the configuration files (nebula-graphd.conf) of all Graph services
  in the cluster, add --use_vertex_key=true to the configuration files (nebula-storaged.conf)
  of all Storage services in the cluster. #4629