Release 2.9.0

This release adds major new features since the 2.8.1 release.
We deem it moderate priority for upgrading.

This release includes these noteworthy features:
* Hierarchical Continuous Aggregates (aka Continuous Aggregate on top of another Continuous Aggregate)
* Improve `time_bucket_gapfill` function allowing specifying timezone to bucket
* Use `alter_data_node()` to change the data node configuration. This function introduces the option to configure the availability of the data node.

This release also includes several bug fixes.

**Features**
* #4476 Batch rows on access node for distributed COPY
* #4567 Exponentially backoff when out of background workers
* #4650 Show warnings when not following best practices
* #4664 Introduce fixed schedules for background jobs
* #4668 Hierarchical Continuous Aggregates
* #4670 Add timezone support to time_bucket_gapfill
* #4678 Add interface for troubleshooting job failures
* #4718 Add ability to merge chunks while compressing
* #4786 Extend the now() optimization to also apply to CURRENT_TIMESTAMP
* #4820 Support parameterized data node scans in joins
* #4830 Add function to change configuration of a data nodes
* #4966 Handle DML activity when datanode is not available
* #4971 Add function to drop stale chunks on a datanode

**Bugfixes**
* #4663 Don't error when compression metadata is missing
* #4673 Fix now() constification for VIEWs
* #4681 Fix compression_chunk_size primary key
* #4696 Report warning when enabling compression on hypertable
* #4745 Fix FK constraint violation error while insert into hypertable which references partitioned table
* #4756 Improve compression job IO performance
* #4770 Continue compressing other chunks after an error
* #4794 Fix degraded performance seen on timescaledb_internal.hypertable_local_size() function
* #4807 Fix segmentation fault during INSERT into compressed hypertable
* #4822 Fix missing segmentby compression option in CAGGs
* #4823 Fix a crash that could occur when using nested user-defined functions with hypertables
* #4840 Fix performance regressions in the copy code
* #4860 Block multi-statement DDL command in one query
* #4898 Fix cagg migration failure when trying to resume
* #4904 Remove BitmapScan support in DecompressChunk
* #4906 Fix a performance regression in the query planner by speeding up frozen chunk state checks
* #4910 Fix a typo in process_compressed_data_out
* #4918 Cagg migration orphans cagg policy
* #4941 Restrict usage of the old format (pre 2.7) of continuous aggregates in PostgreSQL 15.
* #4955 Fix cagg migration for hypertables using timestamp without timezone
* #4968 Check for interrupts in gapfill main loop
* #4988 Fix cagg migration crash when refreshing the newly created cagg

**Thanks**
* @jflambert for reporting a crash with nested user-defined functions.
* @jvanns for reporting hypertable FK reference to vanilla PostgreSQL partitioned table doesn't seem to work
* @kou for fixing a typo in process_compressed_data_out
* @xvaara for helping reproduce a bug with bitmap scans in transparent decompression
* @byazici for reporting a problem with segmentby on compressed caggs
* @tobiasdirksen for requesting Continuous aggregate on top of another continuous aggregate
* @Xima for reporting a bug in Cagg migration

CHANGELOG.md

@@ -4,41 +4,64 @@
 `psql` with the `-X` flag to prevent any `.psqlrc` commands from
 accidentally triggering the load of a previous DB version.**
 
-## Unreleased
+## 2.9.0
+This release adds major new features since the 2.8.1 release.
+We deem it moderate priority for upgrading.
+
+This release includes these noteworthy features:
+* Hierarchical Continuous Aggregates (aka Continuous Aggregate on top of another Continuous Aggregate)
+* Improve `time_bucket_gapfill` function allowing specifying timezone to bucket
+* Use `alter_data_node()` to change the data node configuration. This function introduces the option to configure the availability of the data node.
 
-This version adds time_bucket_gapfill function that allows
-specifying the timezone to bucket for. Unfortunately this introduces
-an ambiguity with some previous call variations when an untyped
-start/finish argument is passed to time_bucket_gapfill. Some queries
-might need to be adjusted and either explicitly name the positional
-argument or resolve the type ambiguity by casting to the intended type.
+This release also includes several bug fixes.
 
 **Features**
+* #4476 Batch rows on access node for distributed COPY
+* #4567 Exponentially backoff when out of background workers
 * #4650 Show warnings when not following best practices
+* #4664 Introduce fixed schedules for background jobs
+* #4668 Hierarchical Continuous Aggregates
 * #4670 Add timezone support to time_bucket_gapfill
+* #4678 Add interface for troubleshooting job failures
 * #4718 Add ability to merge chunks while compressing
 * #4786 Extend the now() optimization to also apply to CURRENT_TIMESTAMP
+* #4820 Support parameterized data node scans in joins
+* #4830 Add function to change configuration of a data nodes
+* #4966 Handle DML activity when datanode is not available
+* #4971 Add function to drop stale chunks on a datanode
 
 **Bugfixes**
+* #4663 Don't error when compression metadata is missing
 * #4673 Fix now() constification for VIEWs
 * #4681 Fix compression_chunk_size primary key
 * #4696 Report warning when enabling compression on hypertable
 * #4745 Fix FK constraint violation error while insert into hypertable which references partitioned table
 * #4756 Improve compression job IO performance
+* #4770 Continue compressing other chunks after an error
+* #4794 Fix degraded performance seen on timescaledb_internal.hypertable_local_size() function
 * #4807 Fix segmentation fault during INSERT into compressed hypertable
-* #4840 Fix performance regressions in the copy code
+* #4822 Fix missing segmentby compression option in CAGGs
 * #4823 Fix a crash that could occur when using nested user-defined functions with hypertables
+* #4840 Fix performance regressions in the copy code
+* #4860 Block multi-statement DDL command in one query
 * #4898 Fix cagg migration failure when trying to resume
+* #4904 Remove BitmapScan support in DecompressChunk
 * #4906 Fix a performance regression in the query planner by speeding up frozen chunk state checks
 * #4910 Fix a typo in process_compressed_data_out
+* #4918 Cagg migration orphans cagg policy
+* #4941 Restrict usage of the old format (pre 2.7) of continuous aggregates in PostgreSQL 15.
 * #4955 Fix cagg migration for hypertables using timestamp without timezone
 * #4968 Check for interrupts in gapfill main loop
+* #4988 Fix cagg migration crash when refreshing the newly created cagg
 
 **Thanks**
 * @jflambert for reporting a crash with nested user-defined functions.
 * @jvanns for reporting hypertable FK reference to vanilla PostgreSQL partitioned table doesn't seem to work
 * @kou for fixing a typo in process_compressed_data_out
 * @xvaara for helping reproduce a bug with bitmap scans in transparent decompression
+* @byazici for reporting a problem with segmentby on compressed caggs
+* @tobiasdirksen for requesting Continuous aggregate on top of another continuous aggregate
+* @xima for reporting a bug in Cagg migration
 
 ## 2.8.1 (2022-10-06)
 

sql/CMakeLists.txt

@@ -39,7 +39,8 @@ set(MOD_FILES
     updates/2.7.0--2.7.1.sql
     updates/2.7.1--2.7.2.sql
     updates/2.7.2--2.8.0.sql
-    updates/2.8.0--2.8.1.sql)
+    updates/2.8.0--2.8.1.sql
+    updates/2.8.1--2.9.0.sql)
 
 # The downgrade file to generate a downgrade script for the current version, as
 # specified in version.config