Don't abort additional INSERTs when hitting first conflict #7673
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## main #7673 +/- ##
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+ Coverage 80.06% 81.30% +1.23%
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Files 190 242 +52
Lines 37181 44890 +7709
Branches 9450 11202 +1752
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- Misses 2997 3999 +1002
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When an INSERT with ON CONFLICT DO NOTHING hits the first conflicts it would abort additional INSERTS following the INSERT triggering the DO NOTHING clause leading to missed INSERTs. Fixes timescale#7672
fabriziomello
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Feb 10, 2025
antekresic
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This release contains performance improvements and bug fixes since the 2.18.0 release. We recommend that you upgrade at the next available opportunity. **Features** * timescale#7656 Remove limitation of compression policy for continuous aggregates **Bugfixes** * timescale#6884 Match the Postgres NaN comparison behavior in WHERE clause over compressed tables. * timescale#7600 Fix lock order when dropping index * timescale#7637 Allow EXPLAIN in read-only mode * timescale#7645 Fix DELETE on compressed chunk with non-btree operators * timescale#7649 Allow non-btree operator pushdown in UPDATE/DELETE queries on compressed chunks * timescale#7653 Push down orderby scankeys to Hypercore TAM * timescale#7665 Block merging of frozen chunks * timescale#7673 Don't abort additional INSERTs when hitting first conflict **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @ikalafat for reporting a problem with EXPLAIN in read-only mode * @jakehedlund for reporting the incompatible NaN behavior in WHERE clause over compressed tables. * Timescale community members Jacob and pantonis for reporting issues with slow queries.
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This release contains performance improvements and bug fixes since the 2.18.0 release. We recommend that you upgrade at the next available opportunity. **Features** * timescale#7656 Remove limitation of compression policy for continuous aggregates **Bugfixes** * timescale#6884 Match the Postgres NaN comparison behavior in WHERE clause over compressed tables. * timescale#7600 Fix lock order when dropping index * timescale#7637 Allow EXPLAIN in read-only mode * timescale#7645 Fix DELETE on compressed chunk with non-btree operators * timescale#7649 Allow non-btree operator pushdown in UPDATE/DELETE queries on compressed chunks * timescale#7653 Push down orderby scankeys to Hypercore TAM * timescale#7665 Block merging of frozen chunks * timescale#7673 Don't abort additional INSERTs when hitting first conflict **GUCs** * enable_hypercore_scankey_pushdown: Push down qualifiers as scankeys when using Hypercore TAM **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @ikalafat for reporting a problem with EXPLAIN in read-only mode * @jakehedlund for reporting the incompatible NaN behavior in WHERE clause over compressed tables. * Timescale community members Jacob and pantonis for reporting issues with slow queries.
svenklemm
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This release contains performance improvements and bug fixes since the 2.18.0 release. We recommend that you upgrade at the next available opportunity. **Features** * timescale#7656 Remove limitation of compression policy for continuous aggregates **Bugfixes** * timescale#7600 Fix lock order when dropping index * timescale#7637 Allow EXPLAIN in read-only mode * timescale#7645 Fix DELETE on compressed chunk with non-btree operators * timescale#7649 Allow non-btree operator pushdown in UPDATE/DELETE queries on compressed chunks * timescale#7653 Push down orderby scankeys to Hypercore TAM * timescale#7665 Block merging of frozen chunks * timescale#7673 Don't abort additional INSERTs when hitting first conflict **GUCs** * enable_hypercore_scankey_pushdown: Push down qualifiers as scankeys when using Hypercore TAM **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @ikalafat for reporting a problem with EXPLAIN in read-only mode * Timescale community members Jacob and pantonis for reporting issues with slow queries.
svenklemm
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Feb 10, 2025
This release contains performance improvements and bug fixes since the 2.18.0 release. We recommend that you upgrade at the next available opportunity. **Features** * #7656 Remove limitation of compression policy for continuous aggregates **Bugfixes** * #7600 Fix lock order when dropping index * #7637 Allow EXPLAIN in read-only mode * #7645 Fix DELETE on compressed chunk with non-btree operators * #7649 Allow non-btree operator pushdown in UPDATE/DELETE queries on compressed chunks * #7653 Push down orderby scankeys to Hypercore TAM * #7665 Block merging of frozen chunks * #7673 Don't abort additional INSERTs when hitting first conflict **GUCs** * enable_hypercore_scankey_pushdown: Push down qualifiers as scankeys when using Hypercore TAM **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @ikalafat for reporting a problem with EXPLAIN in read-only mode * Timescale community members Jacob and pantonis for reporting issues with slow queries.
svenklemm
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Feb 10, 2025
This release contains performance improvements and bug fixes since the 2.18.0 release. We recommend that you upgrade at the next available opportunity. **Features** * [timescale#7656](timescale#7656) Remove limitation of compression policy for continuous aggregates **Bugfixes** * [timescale#7600](timescale#7600) Fix lock order when dropping index * [timescale#7637](timescale#7637) Allow EXPLAIN in read-only mode * [timescale#7645](timescale#7645) Fix DELETE on compressed chunk with non-btree operators * [timescale#7649](timescale#7649) Allow non-btree operator pushdown in UPDATE/DELETE queries on compressed chunks * [timescale#7653](timescale#7653) Push down orderby scankeys to Hypercore TAM * [timescale#7665](timescale#7665) Block merging of frozen chunks * [timescale#7673](timescale#7673) Don't abort additional INSERTs when hitting first conflict **GUCs** * `enable_hypercore_scankey_pushdown`: Push down qualifiers as scankeys when using Hypercore TAM introduced with [timescale#7653](timescale#7653) **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @ikalafat for reporting a problem with EXPLAIN in read-only mode * Timescale community members Jacob and pantonis for reporting issues with slow queries.
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This release contains performance improvements and bug fixes since the 2.18.0 release. We recommend that you upgrade at the next available opportunity. **Features** * [timescale#7656](timescale#7656) Remove limitation of compression policy for continuous aggregates **Bugfixes** * [timescale#7600](timescale#7600) Fix lock order when dropping index * [timescale#7637](timescale#7637) Allow EXPLAIN in read-only mode * [timescale#7645](timescale#7645) Fix DELETE on compressed chunk with non-btree operators * [timescale#7649](timescale#7649) Allow non-btree operator pushdown in UPDATE/DELETE queries on compressed chunks * [timescale#7653](timescale#7653) Push down orderby scankeys to Hypercore TAM * [timescale#7665](timescale#7665) Block merging of frozen chunks * [timescale#7673](timescale#7673) Don't abort additional INSERTs when hitting first conflict **GUCs** * `enable_hypercore_scankey_pushdown`: Push down qualifiers as scankeys when using Hypercore TAM introduced with [timescale#7653](timescale#7653) **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @ikalafat for reporting a problem with EXPLAIN in read-only mode * Timescale community members Jacob and pantonis for reporting issues with slow queries.
svenklemm
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Feb 10, 2025
This release contains performance improvements and bug fixes since the 2.18.0 release. We recommend that you upgrade at the next available opportunity. **Features** * [timescale#7656](timescale#7656) Remove limitation of compression policy for continuous aggregates **Bugfixes** * [timescale#7600](timescale#7600) Fix lock order when dropping index * [timescale#7637](timescale#7637) Allow EXPLAIN in read-only mode * [timescale#7645](timescale#7645) Fix DELETE on compressed chunk with non-btree operators * [timescale#7649](timescale#7649) Allow non-btree operator pushdown in UPDATE/DELETE queries on compressed chunks * [timescale#7653](timescale#7653) Push down orderby scankeys to Hypercore TAM * [timescale#7665](timescale#7665) Block merging of frozen chunks * [timescale#7673](timescale#7673) Don't abort additional INSERTs when hitting first conflict **GUCs** * `enable_hypercore_scankey_pushdown`: Push down qualifiers as scankeys when using Hypercore TAM introduced with [timescale#7653](timescale#7653) **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @ikalafat for reporting a problem with EXPLAIN in read-only mode * Timescale community members Jacob and pantonis for reporting issues with slow queries.
svenklemm
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Feb 10, 2025
This release contains performance improvements and bug fixes since the 2.18.0 release. We recommend that you upgrade at the next available opportunity. **Features** * [timescale#7656](timescale#7656) Remove limitation of compression policy for continuous aggregates **Bugfixes** * [timescale#7600](timescale#7600) Fix lock order when dropping index * [timescale#7637](timescale#7637) Allow EXPLAIN in read-only mode * [timescale#7645](timescale#7645) Fix DELETE on compressed chunk with non-btree operators * [timescale#7649](timescale#7649) Allow non-btree operator pushdown in UPDATE/DELETE queries on compressed chunks * [timescale#7653](timescale#7653) Push down orderby scankeys to Hypercore TAM * [timescale#7665](timescale#7665) Block merging of frozen chunks * [timescale#7673](timescale#7673) Don't abort additional INSERTs when hitting first conflict **GUCs** * `enable_hypercore_scankey_pushdown`: Push down qualifiers as scankeys when using Hypercore TAM introduced with [timescale#7653](timescale#7653) **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @ikalafat for reporting a problem with EXPLAIN in read-only mode * Timescale community members Jacob and pantonis for reporting issues with slow queries.
svenklemm
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This release contains performance improvements and bug fixes since the 2.18.0 release. We recommend that you upgrade at the next available opportunity. **Features** * [#7656](#7656) Remove limitation of compression policy for continuous aggregates **Bugfixes** * [#7600](#7600) Fix lock order when dropping index * [#7637](#7637) Allow EXPLAIN in read-only mode * [#7645](#7645) Fix DELETE on compressed chunk with non-btree operators * [#7649](#7649) Allow non-btree operator pushdown in UPDATE/DELETE queries on compressed chunks * [#7653](#7653) Push down orderby scankeys to Hypercore TAM * [#7665](#7665) Block merging of frozen chunks * [#7673](#7673) Don't abort additional INSERTs when hitting first conflict **GUCs** * `enable_hypercore_scankey_pushdown`: Push down qualifiers as scankeys when using Hypercore TAM introduced with [#7653](#7653) **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @ikalafat for reporting a problem with EXPLAIN in read-only mode * Timescale community members Jacob and pantonis for reporting issues with slow queries.
philkra
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## 2.19.0 (2025-03-12) This release contains performance improvements and bug fixes since the 2.18.2 release. We recommend that you upgrade at the next available opportunity. **Features** * [#7586](#7586) Vectorized aggregation with grouping by a single text column. * [#7632](#7632) Optimize recompression for chunks without segmentby * [#7655](#7655) Support vectorized aggregation on Hypercore TAM * [#7669](#7669) Add support for merging compressed chunks * [#7701](#7701) Implement a custom compression algorithm for bool columns. It is experimental and can undergo backwards-incompatible changes. For testing, enable it using timescaledb.enable_bool_compression = on. * [#7707](#7707) Support ALTER COLUMN SET NOT NULL on compressed chunks * [#7765](#7765) Allow tsdb as alias for timescaledb in WITH and SET clauses * [#7786](#7786) Show warning for inefficient compress_chunk_time_interval configuration * [#7788](#7788) Add callback to mem_guard for background workers * [#7789](#7789) Do not recompress segmentwise when default order by is empty * [#7790](#7790) Add configurable Incremental CAgg Refresh Policy **Bugfixes** * [#7665](#7665) Block merging of frozen chunks * [#7673](#7673) Don't abort additional INSERTs when hitting first conflict * [#7714](#7714) Fixes a wrong result when compressed NULL values were confused with default values. This happened in very special circumstances with alter table added a new column with a default value, an update and compression in a very particular order. * [#7747](#7747) Block TAM rewrites with incompatible GUC setting * [#7748](#7748) Crash in the segmentwise recompression * [#7764](#7764) Fix compression settings handling in Hypercore TAM * [#7768](#7768) Remove costing index scan of hypertable parent * [#7799](#7799) Handle DEFAULT table access name in ALTER TABLE **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @kav23alex for reporting a segmentation fault on ALTER TABLE with DEFAULT Signed-off-by: Philip Krauss <35487337+philkra@users.noreply.github.com>
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## 2.19.0 (2025-03-18) This release contains performance improvements and bug fixes since the 2.18.2 release. We recommend that you upgrade at the next available opportunity. * Improved concurrency of INSERT, UPDATE and DELETE operations on the columnstore by no longer blocking DML statements during the recompression of a chunk. * Improved system performance during Continuous Aggregates refreshes by breaking them into smaller batches which reduces systems pressure and minimizes the risk of spilling to disk. * Faster and more up-to-date results for queries against Continuous Aggregates by materializing the most recent data first (vs old data first in prior versions). * Faster analytical queries with SIMD vectorization of aggregations over text columns and group by over multiple column * Enable optimizing chunk size for faster query performance on the columnstore by adding support for merging columnstore chunks to the merge_chunk API. **Deprecation warning** This is the last minor release supporting PostgreSQL 14. Starting with the minor version of TimescaleDB only Postgres 15, 16 and 17 will be supported. **Downgrading of 2.19.0** This release introduces custom bool compression, if you enable this feature via the `enable_bool_compression` and must downgrade to a previous, please use the [following script](https://github.com/timescale/timescaledb-extras/blob/master/utils/2.19.0-downgrade_new_compression_algorithms.sql) to convert the columns back to their previous state. TimescaleDB versions prior to 2.19.0 do not know how to handle this new type. **Features** * [#7586](#7586) Vectorized aggregation with grouping by a single text column. * [#7632](#7632) Optimize recompression for chunks without segmentby * [#7655](#7655) Support vectorized aggregation on Hypercore TAM * [#7669](#7669) Add support for merging compressed chunks * [#7701](#7701) Implement a custom compression algorithm for bool columns. It is experimental and can undergo backwards-incompatible changes. For testing, enable it using timescaledb.enable_bool_compression = on. * [#7707](#7707) Support ALTER COLUMN SET NOT NULL on compressed chunks * [#7765](#7765) Allow tsdb as alias for timescaledb in WITH and SET clauses * [#7786](#7786) Show warning for inefficient compress_chunk_time_interval configuration * [#7788](#7788) Add callback to mem_guard for background workers * [#7789](#7789) Do not recompress segmentwise when default order by is empty * [#7790](#7790) Add configurable Incremental CAgg Refresh Policy **Bugfixes** * [#7665](#7665) Block merging of frozen chunks * [#7673](#7673) Don't abort additional INSERTs when hitting first conflict * [#7714](#7714) Fixes a wrong result when compressed NULL values were confused with default values. This happened in very special circumstances with alter table added a new column with a default value, an update and compression in a very particular order. * [#7747](#7747) Block TAM rewrites with incompatible GUC setting * [#7748](#7748) Crash in the segmentwise recompression * [#7764](#7764) Fix compression settings handling in Hypercore TAM * [#7768](#7768) Remove costing index scan of hypertable parent * [#7799](#7799) Handle DEFAULT table access name in ALTER TABLE **GUCs** * `enable_bool_compression`: enable the BOOL compression algorithm, default: `OFF` * `enable_exclusive_locking_recompression`: enable exclusive locking during recompression (legacy mode), default: `OFF` **Thanks** * @bjornuppeke for reporting a problem with INSERT INTO ... ON CONFLICT DO NOTHING on compressed chunks * @kav23alex for reporting a segmentation fault on ALTER TABLE with DEFAULT --------- Signed-off-by: Philip Krauss <35487337+philkra@users.noreply.github.com> Signed-off-by: Ramon Guiu <ramon@timescale.com> Co-authored-by: Ramon Guiu <ramon@timescale.com>
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When an INSERT with ON CONFLICT DO NOTHING hits the first conflicts
it would abort additional INSERTS following the INSERT triggering
the DO NOTHING clause leading to missed INSERTs.
Fixes #7672
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