Release 2.7.0

[mfundul]

This release adds major new features since the 2.6.1 release.
We deem it moderate priority for upgrading.

This release includes these noteworthy features:

• Optimize continuous aggregate query performance and storage
• The following query clauses and functions can now be used in a continuous
  aggregate: FILTER, DISTINCT, ORDER BY as well as Ordered-Set Aggregate
  and Hypothetical-Set Aggregate
• Optimize now() query planning time
• Improve COPY insert performance
• Improve performance of UPDATE/DELETE on PG14 by excluding chunks

This release also includes several bug fixes.

If you are upgrading from a previous version and were using compression
with a non-default collation on a segmentby-column you should recompress
those hypertables.

Features

• Custom origin's support in CAGGs #4045 Custom origin's support in CAGGs
• Add logging for retention policy #4120 Add logging for retention policy
• Allow ANALYZE command on a data node directly #4158 Allow ANALYZE command on a data node directly
• Add support for chunk exclusion on DELETE #4169 Add support for chunk exclusion on DELETE to PG14
• Add chunk exclusion for UPDATE for PG14 #4209 Add support for chunk exclusion on UPDATE to PG14
• Continuous Aggregates finals form #4269 Continuous Aggregates finals form
• Multi-buffer copy optimization backport #4301 Add support for bulk inserts in COPY operator
• Support non-superuser move chunk operations #4311 Support non-superuser move chunk operations
• Add GUC "bgw_launcher_poll_time" #4330 Add GUC "bgw_launcher_poll_time"
• Enable now() usage in plan-time chunk exclusion #4340 Enable now() usage in plan-time chunk exclusion

Bugfixes

• Fix segfault in Continuous Aggregates #3899 Fix segfault in Continuous Aggregates
• Fix TRUNCATE error as non-owner on hypertable #4225 Fix TRUNCATE error as non-owner on hypertable
• Set the correct collation for the compressed chunk columns #4236 Fix potential wrong order of results for compressed hypertable with a non-default collation
• [Bug]: create_group_indexes option in caggs does not work properly #4249 Fix option "timescaledb.create_group_indexes"
• [Bug]: Insert into a compressed chunk segfaults if you drop a column from the hypertable #4251 Fix INSERT into compressed chunks with dropped columns
• Fix option "timescaledb.create_group_indexes" #4255 Fix option "timescaledb.create_group_indexes"
• Fix logic bug in init_privs query #4259 Fix logic bug in extension update script
• Continuous Aggregates finals form #4269 Fix bad Continuous Aggregate view definition reported in [Bug]: Bad Continuous Aggregate View Definition #4233
• Support moving compressed chunks between data nodes #4289 Support moving compressed chunks between data nodes
• Fix refresh window cap for cagg refresh #4300 Fix refresh window cap for cagg refresh policy
• bugfix: memory leak when call list_qsort. #4315 Fix memory leak in scheduler
• Remove printouts from signal handlers #4323 Remove printouts from signal handlers
• Fix move chunk cleanup logic #4342 Fix move chunk cleanup logic
• Fix crashes in functions using AlterTableInternal #4349 Fix crashes in functions using AlterTableInternal
• Fix crash and other issues in telemetry reporter  #4358 Fix crash and other issues in telemetry reporter

Thanks

• @abrownsword for reporting a bug in the telemetry reporter and testing the fix
• @jsoref for fixing various misspellings in code, comments and documentation
• @yalon for reporting an error with ALTER TABLE RENAME on distributed hypertables
• @zhuizhuhaomeng for reporting and fixing a memory leak in our scheduler

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (2.7.x@26da1b5). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff            @@
##             2.7.x    #4378   +/-   ##
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  Coverage         ?   90.83%           
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  Files            ?      217           
  Lines            ?    40264           
  Branches         ?        0           
========================================
  Hits             ?    36572           
  Misses           ?     3692           
  Partials         ?        0           

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