Release 2.13.0

[jnidzwetzki]

This release contains performance improvements, an improved hypertable DDL API
and bug fixes since the 2.12.2 release. We recommend that you upgrade at the next
available opportunity.

In addition, it includes these noteworthy features:

• Full PostgreSQL 16 support for all existing features
• Vectorized aggregation execution for sum()
• Track chunk creation time used in retention/compression policies

Deprecation notice: Multi-node support

TimescaleDB 2.13 is the last version that will include multi-node support. Multi-node
support in 2.13 is available for PostgreSQL 13, 14 and 15. Learn more about it
here.

If you want to migrate from multi-node TimescaleDB to single-node TimescaleDB read the
migration documentation.

PostgreSQL 13 deprecation announcement

We will continue supporting PostgreSQL 13 until April 2024. Sooner to that time, we will
announce the specific version of TimescaleDB in which PostgreSQL 13 support will not be
included going forward.

Starting from TimescaleDB 2.13.0

• No Amazon Machine Images (AMI) are published. If you previously used AMI, please
  use another installation method
• Continuous Aggregates are materialized only (non-realtime) by default

Features

• Add sorted paths for compressed chunks #5575 Add chunk-wise sorted paths for compressed chunks
• Simplify hypertable DDL APIs #5761 Simplify hypertable DDL API
• Reduce WAL activity by freezing tuples immediately #5890 Reduce WAL activity by freezing compressed tuples immediately
• Vectorized aggregation execution for sum #6050 Vectorized aggregation execution for sum()
• Add metadata for chunk creation time #6062 Add metadata for chunk creation time
• Make CAggs materialized only by default #6077 Make Continous Aggregates materialized only (non-realtime) by default
• Change show_chunks/drop_chunks using creation time #6177 Change show_chunks/drop_chunks using chunk creation time
• Show batches/tuples decompressed during DML operations in EXPLAIN output #6178 Show batches/tuples decompressed during DML operations in EXPLAIN output
• Keep track of catalog version #6185 Keep track of catalog version
• Use creation time in retention/compression policy #6227 Use creation time in retention/compression policy
• Add SQL function cagg_validate_query #6307 Add SQL function cagg_validate_query

Bugfixes

• Add GUC for setting background worker log level #6188 Add GUC for setting background worker log level
• Fix index inserts during decompression #6222 Allow enabling compression on hypertable with unique expression index
• Check if worker registration succeeded #6240 Check if worker registration succeeded
• Fix exception detail passing in compression_policy_execute #6254 Fix exception detail passing in compression_policy_execute
• Fix missing result assignment for bms_del_member #6264 Fix missing bms_del_member result assignment
• Fix compression for tables with large oids #6275 Fix negative bitmapset member not allowed in compression
• Do not use partial indexes for compression #6280 Potential data loss when compressing a table with a partial index that matches compression order.
• Add support for startup chunk exclusion with aggs #6289 Add support for startup chunk exclusion with aggs
• Repair relacl on extension upgrade #6290 Repair relacl on upgrade
• Fix segfault creating cagg with NULL bucket width #6297 Fix segfault when creating a cagg using a NULL width in time bucket function
• Make _timescaledb_functions.makeaclitem strict #6305 Make timescaledb_functions.makeaclitem strict
• Fix segmentby typmod and collation of compressed chunks #6332 Fix typmod and collation for segmentby columns
• Fix non-default tablespaces with constraints #6339 Fix tablespace with constraints
• Use segmentwise recompression in compress policy #6343 Enable segmentwise recompression in compression policy

Thanks

• @fetchezar for reporting an issue with compression policy error messages
• @jflambert for reporting the background worker log level issue
• @torazem for reporting an issue with compression and large oids
• @fetchezar for reporting an issue in the compression policy
• @lyp-bobi for reporting an issue with tablespace with constraints
• @pdipesh02 for contributing to the implementation of the metadata for chunk creation time,
  the generalized hypertable API, and show_chunks/drop_chunks using chunk creation time
• @lkshminarayanan for all his work on PG16 support

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b839362) 86.99% compared to head (4f096c0) 82.43%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6336      +/-   ##
==========================================
- Coverage   86.99%   82.43%   -4.56%     
==========================================
  Files         249      249              
  Lines       57976    57930      -46     
  Branches    12911    12892      -19     
==========================================
- Hits        50434    47754    -2680     
- Misses       5150     6765    +1615     
- Partials     2392     3411    +1019     

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[github-actions]

@mahipv, @nikkhils: please review this pull request.

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[iroussos]

Thank you @jnidzwetzki, looks good to me - I have added a few comments for others to check

[iroussos]

@jnidzwetzki I added one last commit with a few changes on the deprecation notes - everything is good to go on my side, feel free to continue with the release if everything else looks good to you

[jnidzwetzki]

@iroussos Thanks. I squashed the commits and updated the branch. Please have a final look before we merge.

[iroussos]

LGTM @jnidzwetzki