This release candidate contains bugfixes since the previous release
candidate, as well as additional minor features. It improves
validation of configuration changes for background jobs, adds support
for gapfill on distributed tables, contains improvements to the memory
handling for large COPY, and contains improvements to compression for
distributed hypertables.
**Minor Features**
* #2689 Check configuration in alter_job and add_job
* #2696 Support gapfill on distributed hypertable
* #2468 Show more information in get_git_commit
* #2678 Include user actions into job stats view
* #2664 Fix support for complex aggregate expression
* #2672 Add hypertable to continuous aggregates view
* #2662 Save compression metadata settings on access node
* #2707 Introduce additional db for data node bootstrapping
**Bugfixes**
* #2688 Fix crash for concurrent drop and compress chunk
* #2666 Fix timeout handling in async library
* #2683 Fix crash in add_job when given NULL interval
* #2698 Improve memory handling for remote COPY
* #2555 Set metadata for chunks compressed before 2.0
This release candidate contains bugfixes since the previous release
candidate, as well as additional minor features including support for
"user-mapping" authentication between access/data nodes and an
experimental API for refreshing continuous aggregates on individual
chunks.
**Minor Features**
* #2627 Add optional user mappings support
* #2635 Add API to refresh continuous aggregate on chunk
**Bugfixes**
* #2560 Fix SCHEMA DROP CASCADE with continuous aggregates
* #2593 Set explicitly all lock parameters in alter_job
* #2604 Fix chunk creation on hypertables with foreign key constraints
* #2610 Support analyze of internal compression table
* #2612 Optimize internal cagg_watermark function
* #2613 Refresh correct partial during refresh on drop
* #2617 Fix validation of available extensions on data node
* #2619 Fix segfault in decompress_chunk for chunks with dropped columns
* #2620 Fix DROP CASCADE for continuous aggregate
* #2625 Fix subquery errors when using AsyncAppend
* #2626 Fix incorrect total_table_pages setting for compressed scan
* #2628 Stop recursion in cache invalidation
This release candidate contains bugfixes since the previous release candidate.
**Minor Features**
* #2520 Support non-transactional distibuted_exec
**Bugfixes**
* #2307 Overflow handling for refresh policy with integer time
* #2503 Remove error for correct bootstrap of data node
* #2507 Fix validation logic when adding a new data node
* #2510 Fix outer join qual propagation
* #2514 Lock dimension slices when creating new chunk
* #2515 Add if_attached argument to detach_data_node()
* #2517 Fix member access within misaligned address in chunk_update_colstats
* #2525 Fix index creation on hypertables with dropped columns
* #2543 Pass correct status to lock_job
* #2544 Assume custom time type range is same as bigint
* #2563 Fix DecompressChunk path generation
* #2564 Improve continuous aggregate datatype handling
* #2568 Change use of ssl_dir GUC
* #2571 Make errors and messages conform to style guide
* #2577 Exclude compressed chunks from ANALYZE/VACUUM
This release adds major new features and bugfixes since the 1.7.4 release.
We deem it moderate priority for upgrading.
This release adds the long-awaited support for distributed hypertables to
TimescaleDB. With 2.0, users can create distributed hypertables across
multiple instances of TimescaleDB, configured so that one instance serves
as an access node and multiple others as data nodes. All queries for a
distributed hypertable are issued to the access node, but inserted data
and queries are pushed down across data nodes for greater scale and
performance.
This release also adds support for user-defined actions allowing users to
define actions that are run by the TimescaleDB automation framework.
In addition to these major new features, the 2.0 branch introduces _breaking_ changes
to APIs and existing features, such as continuous aggregates. These changes are not
backwards compatible and might require changes to clients and/or scripts that rely on
the previous APIs. Please review our updated documentation and do proper testing to
ensure compatibility with your existing applications.
The noticeable breaking changes in APIs are:
- Redefined functions for policies
- A continuous aggregate is now created with `CREATE MATERIALIZED VIEW`
instead of `CREATE VIEW` and automated refreshing requires adding a policy
via `add_continuous_aggregate_policy`
- Redesign of informational views, including new (and more general) views for
information about policies and user-defined actions
This release candidate is upgradable, so if you are on a previous release (e.g., 1.7.4)
you can upgrade to the release candidate and later expect to be able to upgrade to the
final 2.0 release. However, please carefully consider your compatibility requirements
_before_ upgrading.
**Major Features**
* #1923 Add support for distributed hypertables
* #2006 Add support for user-defined actions
* #2435 Move enterprise features to community
* #2437 Update Timescale License
**Minor Features**
* #2011 Constify TIMESTAMPTZ OP INTERVAL in constraints
* #2105 Support moving compressed chunks
**Bugfixes**
* #1843 Improve handling of "dropped" chunks
* #1886 Change ChunkAppend leader to use worker subplan
* #2116 Propagate privileges from hypertables to chunks
* #2263 Fix timestamp overflow in time_bucket optimization
* #2270 Fix handling of non-reference counted TupleDescs in gapfill
* #2325 Fix rename constraint/rename index
* #2370 Fix detection of hypertables in subqueries
* #2376 Fix caggs width expression handling on int based hypertables
* #2416 Check insert privileges to create chunk
* #2428 Allow owner change of continuous aggregate
* #2436 Propagate grants in continuous aggregates
This maintenance release contains bugfixes since the 1.7.3 release. We deem it
high priority for upgrading if TimescaleDB is deployed with replicas (synchronous
or asynchronous).
In particular the fixes contained in this maintenance release address an issue with
running queries on compressed hypertables on standby nodes.
**Bugfixes**
* #2340 Remove tuple lock on select path
This maintenance release contains bugfixes since the 1.7.2 release. We deem it high
priority for upgrading.
In particular the fixes contained in this maintenance release address issues in compression,
drop_chunks and the background worker scheduler.
**Bugfixes**
* #2059 Improve infering start and stop arguments from gapfill query
* #2067 Support moving compressed chunks
* #2068 Apply SET TABLESPACE for compressed chunks
* #2090 Fix index creation with IF NOT EXISTS for existing indexes
* #2092 Fix delete on tables involving hypertables with compression
* #2164 Fix telemetry installed_time format
* #2184 Fix background worker scheduler memory consumption
* #2222 Fix `negative bitmapset member not allowed` in decompression
* #2255 Propagate privileges from hypertables to chunks
* #2256 Fix segfault in chunk_append with space partitioning
* #2259 Fix recursion in cache processing
* #2261 Lock dimension slice tuple when scanning
**Thanks**
* @akamensky for reporting an issue with drop_chunks and ChunkAppend with space partitioning
* @dewetburger430 for reporting an issue with setting tablespace for compressed chunks
* @fvannee for reporting an issue with cache invalidation
* @nexces for reporting an issue with ChunkAppend on space-partitioned hypertables
* @PichetGoulu for reporting an issue with index creation and IF NOT EXISTS
* @prathamesh-sonpatki for contributing a typo fix
* @sezaru for reporting an issue with background worker scheduler memory consumption
This maintenance release contains bugfixes since the 1.7.1 release. We deem it medium
priority for upgrading.
In particular the fixes contained in this maintenance release address bugs in continuous
aggregates, drop_chunks and compression.
**Features**
* #1877 Add support for fast pruning of inlined functions
**Bugfixes**
* #1908 Fix drop_chunks with unique constraints when cascade_to_materializations is false
* #1915 Check for database in extension_current_state
* #1918 Unify chunk index creation
* #1932 Change compression locking order
* #1938 Fix gapfill locf treat_null_as_missing
* #1982 Check for disabled telemetry earlier
* #1984 Fix compression bit array left shift count
* #1997 Add checks for read-only transactions
* #2002 Reset restoring gucs rather than explicitly setting 'off'
* #2028 Fix locking in drop_chunks
* #2031 Enable compression for tables with compound foreign key
* #2039 Fix segfault in create_trigger_handler
* #2043 Fix segfault in cagg_update_view_definition
* #2046 Use index tablespace during chunk creation
* #2047 Better handling of chunk insert state destruction
* #2049 Fix handling of PlaceHolderVar in DecompressChunk
* #2051 Fix tuple concurrently deleted error with multiple continuous aggregates
**Thanks**
* @akamensky for reporting an issue with telemetry and an issue with drop_chunks
* @darko408 for reporting an issue with decompression
* @dmitri191 for reporting an issue with failing background workers
* @eduardotsj for reporting an issue with indexes not inheriting tablespace settings
* @fourseventy for reporting an issue with multiple continuous aggregrates
* @fvannee for contributing optimizations for pruning inlined functions
* @jflambert for reporting an issue with failing telemetry jobs
* @nbouscal for reporting an issue with compression jobs locking referenced tables
* @nicolai6120 for reporting an issue with locf and treat_null_as_missing
* @nomanor for reporting an issue with expression index with table references
* @olernov for contributing a fix for compressing tables with compound foreign keys
* @werjo for reporting an issue with drop_chunks and unique constraints
We want to have the version in the master branch to be the
version of the next major release with a -dev suffix.
Actual release versions of the code will get their own respective
branches.
This release includes user experience improvements for managing data
nodes, more efficient statistics collection for distributed
hypertables, and miscellaneous fixes and improvements.
**For beta releases**, upgrading from an earlier version of the
extension (including previous beta releases) is not supported.
This release improves performance for queries executed on distributed
hypertables, fixes minor issues and blocks few SQL API functions,
which are not supported on distributed hypertables. It also adds
information about distributed databases in the telemetry.
This change prepares the repo for developing the 2.0.0-beta3.
The CMake configuration required an update to handle both
a beta and dev suffix in the version string.
**For beta releases**, upgrading from an earlier version of the
extension (including previous beta releases) is not supported.
This release introduces *distributed hypertables*, a major new feature
that allows hypertables to scale out across multiple nodes for
increased performance and fault tolerance. Please review the
documentation to learn how to configure and use distributed
hypertables, including current limitations.
This maintenance release contains bugfixes since the 1.7.0 release. We deem it medium
priority for upgrading and high priority for users with multiple continuous aggregates.
In particular the fixes contained in this maintenance release address bugs in continuous
aggregates with real-time aggregation and PostgreSQL 12 support.
**Bugfixes**
* #1834 Define strerror() for Windows
* #1846 Fix segfault on COPY to hypertable
* #1850 Fix scheduler failure due to bad next_start_time for jobs
* #1851 Fix hypertable expansion for UNION ALL
* #1854 Fix reorder policy job to skip compressed chunks
* #1861 Fix qual pushdown for compressed hypertables where quals have casts
* #1864 Fix issue with subplan selection in parallel ChunkAppend
* #1868 Add support for WHERE, HAVING clauses with real time aggregates
* #1869 Fix real time aggregate support for multiple continuous aggregates
* #1871 Don't rely on timescaledb.restoring for upgrade
* #1875 Fix hypertable detection in subqueries
* #1884 Fix crash on SELECT WHERE NOT with empty table
**Thanks**
* @airton-neto for reporting an issue with queries over UNIONs of hypertables
* @dhodyn for reporting an issue with UNION ALL queries
* @frostwind for reporting an issue with casts in where clauses on compressed hypertables
* @fvannee for reporting an issue with hypertable detection in inlined SQL functions and an issue with COPY
* @hgiasac for reporting missing where clause with real time aggregates
* @louisth for reporting an issue with real-time aggregation and multiple continuous aggregates
* @michael-sayapin for reporting an issue with INSERTs and WHERE NOT EXISTS
* @olernov for reporting and fixing an issue with compressed chunks in the reorder policy
* @pehlert for reporting an issue with pg_upgrade
This release adds major new features and bugfixes since the 1.6.1 release.
We deem it moderate priority for upgrading.
This release adds the long-awaited support for PostgreSQL 12 to TimescaleDB.
This release also adds a new default behavior when querying continuous
aggregates that we call real-time aggregation. A query on a continuous
aggregate will now combine materialized data with recent data that has
yet to be materialized.
Note that only newly created continuous aggregates will have this
real-time query behavior, although it can be enabled on existing
continuous aggregates with a configuration setting as follows:
ALTER VIEW continuous_view_name SET (timescaledb.materialized_only=false);
This release also moves several data management lifecycle features
to the Community version of TimescaleDB (from Enterprise), including
data reordering and data retention policies.
**Major Features**
* #1456 Add support for PostgreSQL 12
* #1685 Add support for real-time aggregation on continuous aggregates
**Bugfixes**
* #1665 Add ignore_invalidation_older_than to timescaledb_information.continuous_aggregates view
* #1750 Handle undefined ignore_invalidation_older_than
* #1757 Restrict watermark to max for continuous aggregates
* #1769 Add rescan function to CompressChunkDml CustomScan node
* #1785 Fix last_run_success value in continuous_aggregate_stats view
* #1801 Include parallel leader in plan execution
* #1808 Fix ts_hypertable_get_all for compressed tables
* #1828 Ignore dropped chunks in compressed_chunk_stats
**Licensing changes**
* Reorder and policies around reorder and drop chunks are now
accessible to community users, not just enterprise
* Gapfill functionality no longer warns about expired license
**Thanks**
* @t0k4rt for reporting an issue with parallel chunk append plans
* @alxndrdude for reporting an issue when trying to insert into compressed chunks
* @Olernov for reporting and fixing an issue with show_chunks and drop_chunks for compressed hypertables
* @mjb512 for reporting an issue with INSERTs in CTEs in cached plans
* @dmarsh19 for reporting and fixing an issue with dropped chunks in compressed_chunk_stats
This maintenance release contains bugfixes since the 1.6.0 release. We deem it medium
priority for upgrading.
In particular the fixes contained in this maintenance release address bugs in continuous
aggregates, time_bucket_gapfill, partial index handling and drop_chunks.
**For this release only**, you will need to restart the database after upgrade before
restoring a backup.
**Minor Features**
* #1666 Support drop_chunks API for continuous aggregates
* #1711 Change log level for continuous aggregate materialization messages
**Bugfixes**
* #1630 Print notice for COPY TO on hypertable
* #1648 Drop chunks from materialized hypertable
* #1668 Cannot add dimension if hypertable has empty chunks
* #1673 Fix crash when interrupting create_hypertable
* #1674 Fix time_bucket_gapfill's interaction with GROUP BY
* #1686 Fix order by queries on compressed hypertables that have char segment by column
* #1687 Fix issue with disabling compression when foreign keys are present
* #1688 Handle many BGW jobs better
* #1698 Add logic to ignore dropped chunks in hypertable_relation_size
* #1704 Fix bad plan for continuous aggregate materialization
* #1709 Prevent starting background workers with NOLOGIN
* #1713 Fix miscellaneous background worker issues
* #1715 Fix issue with overly aggressive chunk exclusion in outer joins
* #1719 Fix restoring/scheduler entrypoint to avoid BGW death
* #1720 Add scheduler cache invalidations
* #1727 Fix compressing INTERVAL columns
* #1728 Handle Sort nodes in ConstraintAwareAppend
* #1730 Fix partial index handling on hypertables
* #1739 Use release OpenSSL DLLs for debug builds on Windows
* #1740 Fix invalidation entries from multiple caggs on same hypertable
* #1743 Fix continuous aggregate materialization timezone handling
* #1748 Fix remove_drop_chunks_policy for continuous aggregates
**Thanks**
* @RJPhillips01 for reporting an issue with drop chunks.
* @b4eEx for reporting an issue with disabling compression.
* @darko408 for reporting an issue with order by on compressed hypertables
* @mrechte for reporting an issue with compressing INTERVAL columns
* @tstaehli for reporting an issue with ConstraintAwareAppend
* @chadshowalter for reporting an issue with partial index on hypertables
* @geoffreybennett for reporting an issue with create_hypertable when interrupting operations
* @alxndrdude for reporting an issue with background workers during restore
* @zcavaliero for reporting and fixing an issue with dropped columns in hypertable_relation_size
* @ismailakpolat for reporting an issue with cagg materialization on hypertables with TIMESTAMP column
This release adds major new features and bugfixes since the 1.5.1 release.
We deem it moderate priority for upgrading.
The major new feature in this release allows users to keep the aggregated
data in a continuous aggregate while dropping the raw data with drop_chunks.
This allows users to save storage by keeping only the aggregates.
The semantics of the refresh_lag parameter for continuous aggregates has
been changed to be relative to the current timestamp instead of the maximum
value in the table. This change requires that an integer_now func be set on
hypertables with integer-based time columns to use continuous aggregates on
this table.
We added a timescaledb.ignore_invalidation_older_than parameter for continuous
aggregatess. This parameter accept a time-interval (e.g. 1 month). if set,
it limits the amount of time for which to process invalidation. Thus, if
timescaledb.ignore_invalidation_older_than = '1 month', then any modifications
for data older than 1 month from the current timestamp at modification time may
not cause continuous aggregate to be updated. This limits the amount of work
that a backfill can trigger. By default, all invalidations are processed.
**Major Features**
* #1589 Allow drop_chunks while keeping continuous aggregates
**Minor Features**
* #1568 Add ignore_invalidation_older_than option to continuous aggs
* #1575 Reorder group-by clause for continuous aggregates
* #1592 Improve continuous agg user messages
**Bugfixes**
* #1565 Fix partial select query for continuous aggregate
* #1591 Fix locf treat_null_as_missing option
* #1594 Fix error in compression constraint check
* #1603 Add join info to compressed chunk
* #1606 Fix constify params during runtime exclusion
* #1607 Delete compression policy when drop hypertable
* #1608 Add jobs to timescaledb_information.policy_stats
* #1609 Fix bug with parent table in decompression
* #1624 Fix drop_chunks for ApacheOnly
* #1632 Check for NULL before dereferencing variable
**Thanks**
* @optijon for reporting an issue with locf treat_null_as_missing option
* @acarrera42 for reporting an issue with constify params during runtime exclusion
* @ChristopherZellermann for reporting an issue with the compression constraint check
* @SimonDelamare for reporting an issue with joining hypertables with compression
This maintenance release contains bugfixes since the 1.5.0 release. We deem it low
priority for upgrading.
In particular the fixes contained in this maintenance release address potential
segfaults and no other security vulnerabilities. The bugfixes are related to bloom
indexes and updates from previous versions.
**Bugfixes**
* #1523 Fix bad SQL updates from previous updates
* #1526 Fix hypertable model
* #1530 Set active snapshots in multi-xact index create
**Thanks**
* @84660320 for reporting an issue with bloom indexes
This release adds major new features and bugfixes since the 1.4.2 release.
We deem it moderate priority for upgrading.
This release adds compression as a major new feature.
Multiple type-specific compression options are available in this release
(including DeltaDelta with run-length-encoding for integers and
timestamps; Gorilla compression for floats; dictionary-based compression
for any data type, but specifically for low-cardinality datasets;
and other LZ-based techniques). Individual columns can be compressed with
type-specific compression algorithms as Postgres' native row-based format
are rolled up into columnar-like arrays on a per chunk basis.
The query planner then handles transparent decompression for compressed
chunks at execution time.
This release also adds support for basic data tiering by supporting
the migration of chunks between tablespaces, as well as support for
parallel query coordination to the ChunkAppend node.
Previously ChunkAppend would rely on parallel coordination in the
underlying scans for parallel plans.
This maintenance release contains bugfixes since the 1.4.1 release.
We deem it medium priority for upgrading.
In particular the fixes contained in this maintenance release address
2 potential segfaults and no other security vulnerabilities.
The bugfixes are related to background workers, OUTER JOINs, ordered
append on space partitioned hypertables and expression indexes.
This maintenance release contains bugfixes since the 1.4.0 release. We deem it medium
priority for upgrading.
In particular the fixes contained in this maintenance release address 2 potential
segfaults and no other security vulnerabilities. The bugfixes are related to queries
with prepared statements, PL/pgSQL functions and interoperability with other extensions.
More details below.
**Bugfixes**
* #1362 Fix ConstraintAwareAppend subquery exclusion
* #1363 Mark drop_chunks as VOLATILE and not PARALLEL SAFE
* #1369 Fix ChunkAppend with prepared statements
* #1373 Only allow PARAM_EXTERN as time_bucket_gapfill arguments
* #1380 Handle Result nodes gracefully in ChunkAppend
**Thanks**
* @overhacked for reporting an issue with drop_chunks and parallel queries
* @fvannee for reporting an issue with ConstraintAwareAppend and subqueries
* @rrb3942 for reporting a segfault with ChunkAppend and prepared statements
* @mchesser for reporting a segfault with time_bucket_gapfill and subqueries
* @lolizeppelin for reporting and helping debug an issue with ChunkAppend and Result nodes
This release contains major new functionality for continuous aggregates
and adds performance improvements for analytical queries.
In version 1.3.0 we added support for continuous aggregates which
was initially limited to one continuous aggregate per hypertable.
With this release, we remove this restriction and allow multiple
continuous aggregates per hypertable.
This release adds a new custom node ChunkAppend that can perform
execution time constraint exclusion and is also used for ordered
append. Ordered append no longer requires a LIMIT clause and now
supports space partitioning and ordering by time_bucket.
