DuckDB 1.5.3 release notes

This is a bugfix release for various issues discovered after we released v1.5.2.

Please also refer to the announcement blog post: https://duckdb.org/2026/05/20/announcing-duckdb-153

What's Changed

Use DB serialization compatibility for json_serialize_sql by @kryonix in https://github.com/duckdb/duckdb/pull/22004
DuckLake Bump by @pdet in https://github.com/duckdb/duckdb/pull/22014
fix: resolve current catalog in ADBC Ingest to avoid temp table shadowing by @eitsupi in https://github.com/duckdb/duckdb/pull/22020
Fix TIMESTAMPFORMAT being ignored for TIMESTAMPTZ columns in copy to json by @DinosL in https://github.com/duckdb/duckdb/pull/21992
Provide BWC support for join filter pushdowns by @ywelsch in https://github.com/duckdb/duckdb/pull/22029
Add iceberg copy function autoload by @NiclasHaderer in https://github.com/duckdb/duckdb/pull/22037
Fix DISABLE_EXTENSION_LOAD by @mlafeldt in https://github.com/duckdb/duckdb/pull/22019
Fix INSERT OR REPLACE BY NAME regression by excluding conflict columns from SET list by @DinosL in https://github.com/duckdb/duckdb/pull/22049
Git-ignore generated extension loader by @mlafeldt in https://github.com/duckdb/duckdb/pull/22056
Fix constant struct args in lateral table in-out functions by @AlfieJones in https://github.com/duckdb/duckdb/pull/21827
Avoid handling Ctrl+C during shutdown (state might be already gone) by @carlopi in https://github.com/duckdb/duckdb/pull/22059
Add DISABLE_BUILTIN_HTTPLIB option by @carlopi in https://github.com/duckdb/duckdb/pull/22054
Set query field for statements in ALTER TABLE ... ADD COLUMN ... DEFAULT ... workaround by @yan-alex in https://github.com/duckdb/duckdb/pull/22057
Coorporative tasks might lead to busy spinning in TaskExecutor::WorkOnTasks by @NiclasHaderer in https://github.com/duckdb/duckdb/pull/22092
Row group append by @evertlammerts in https://github.com/duckdb/duckdb/pull/22060
Fix empty parquet child schema by @dentiny in https://github.com/duckdb/duckdb/pull/22105
Issue #22096: TopN Window Casts by @hawkfish in https://github.com/duckdb/duckdb/pull/22098
Add support for reading VARIANT using C API by @Dtenwolde in https://github.com/duckdb/duckdb/pull/22065
Bump Julia to v1.5.2 by @taniabogatsch in https://github.com/duckdb/duckdb/pull/22121
fix commit iteration offset bug + relax RemoveFromIndexes assertion by @artjomPlaunov in https://github.com/duckdb/duckdb/pull/22094
Internal #8812: From TIMESTAMPTZ Casts by @hawkfish in https://github.com/duckdb/duckdb/pull/22000
Only build plan_serializer when building the main DuckDB library by @rustyconover in https://github.com/duckdb/duckdb/pull/22100
Fix Row Group Pruner Distinct Bug by @d-justen in https://github.com/duckdb/duckdb/pull/22132
Correctly skip preprocessing PIVOT MultiStatements by @yan-alex in https://github.com/duckdb/duckdb/pull/22141
fix(adbc): report the table name if the table doesn't exist when appending by @eitsupi in https://github.com/duckdb/duckdb/pull/22146
[v1.5 patch] Attempt to fix cache read by @dentiny in https://github.com/duckdb/duckdb/pull/22126
Also execute auto-rollback on CLI ClientContext::Query() query by @yan-alex in https://github.com/duckdb/duckdb/pull/22159
Fix window self join optimizer by @kryonix in https://github.com/duckdb/duckdb/pull/22164
Account for ROW_GROUP_SIZE when deciding whether to append to an existing row group by @evertlammerts in https://github.com/duckdb/duckdb/pull/22109
Use the latest storage version for temp storage by @Mytherin in https://github.com/duckdb/duckdb/pull/22169
Fix: Add pg_catalog.pg_collation compatibility view for SQLAlchemy 2.0.45 reflection by @alonfaraj in https://github.com/duckdb/duckdb/pull/22160
Fix CSV escape by @dentiny in https://github.com/duckdb/duckdb/pull/22176
Fix union_by_name remap for non-nested parquet columns by @feichai0017 in https://github.com/duckdb/duckdb/pull/22177
User-facing enable_caching_operators setting by @lnkuiper in https://github.com/duckdb/duckdb/pull/22191
Fix bignum sum Combine to correctly take over memory ownership of state by @Mytherin in https://github.com/duckdb/duckdb/pull/22209
CompressedFile::Close -> calls Close on its child_handle by @benfleis in https://github.com/duckdb/duckdb/pull/22149
ISSUE-22061: Fix JSON shell output: emit BOOLEAN as true/false, not strings by @herbenderbler in https://github.com/duckdb/duckdb/pull/22073
[Bugfix] Reset pg_err_pos in pg_parser_init to prevent stale error position leaking by @p1p1bear in https://github.com/duckdb/duckdb/pull/22239
Bump httpfs to 3139e40a by @carlopi in https://github.com/duckdb/duckdb/pull/22248
Correctly use new row group when checkpointing, and avoid incorrectly re-using metadata when targeting older storage versions and row ids have changed by @Mytherin in https://github.com/duckdb/duckdb/pull/22253
Fix: release ParquetReader when a file is marked SKIPPED in multi-file scan by @J-Meyers in https://github.com/duckdb/duckdb/pull/22261
Fix UTC±NN00 cannot be parsed in SQL by @tianjq16 in https://github.com/duckdb/duckdb/pull/22244
Defer Bloom Filter Pushdown until it's done by @lnkuiper in https://github.com/duckdb/duckdb/pull/22218
[v1.5] Backport ADBC memleak fix on error path by @dentiny in https://github.com/duckdb/duckdb/pull/22216
Allow package builds to choose linked extensions by @mlafeldt in https://github.com/duckdb/duckdb/pull/22305
Fix UTC+HHMM time zone was parsed incorrectly by @tianjq16 in https://github.com/duckdb/duckdb/pull/22297
Bump httpfs by @carlopi in https://github.com/duckdb/duckdb/pull/22312
Exception format: accept string literals by @carlopi in https://github.com/duckdb/duckdb/pull/22314
Skip schema analysis even if no shredding for rowgroup by @rgernhardt in https://github.com/duckdb/duckdb/pull/21937
Use batch limit for table scans with filters by @Mytherin in https://github.com/duckdb/duckdb/pull/22315
Also redacting bearer token for HTTP secrets by @hannes in https://github.com/duckdb/duckdb/pull/22323
First initialize system, then load extensions (to peek at file to be opened) by @carlopi in https://github.com/duckdb/duckdb/pull/22341
Node Handle Scoping fix by @artjomPlaunov in https://github.com/duckdb/duckdb/pull/22344
Enable windows_amd64 for lance extension by @carlopi in https://github.com/duckdb/duckdb/pull/22367
Internal #9003: TIMETZ Parsing Limit by @hawkfish in https://github.com/duckdb/duckdb/pull/22378
Downcasting decimal fix incorrect out of range error by @Dtenwolde in https://github.com/duckdb/duckdb/pull/22386
GetLocalFileSystem improvements by @carlopi in https://github.com/duckdb/duckdb/pull/21983
Fix double decrement of evicted_data_per_tag in .block read-back by @krleonid in https://github.com/duckdb/duckdb/pull/22394
RowGroup Operator metrics: sequentially scanned row groups + total row groups + cumulative counterparts by @artjomPlaunov in https://github.com/duckdb/duckdb/pull/22339
PostgreSQL compatability: in pg_catalog.pg_database simulate columns datallowconn, datistemplate by @muayyad-alsadi in https://github.com/duckdb/duckdb/pull/22302
Fix eviction size metrics report by @dentiny in https://github.com/duckdb/duckdb/pull/22452
Fix enable_logging() silently resetting logging_storage by @guillesd in https://github.com/duckdb/duckdb/pull/22475
Avoid 3 instances of idx_t - idx_t > 0, and avoid unnecessary check on zLine by @carlopi in https://github.com/duckdb/duckdb/pull/22518
Fix RESET my_global_extension_setting to actually be GLOBAL by @carlopi in https://github.com/duckdb/duckdb/pull/22520
Fix BlockAllocator invalid memory access by @dentiny in https://github.com/duckdb/duckdb/pull/22503
Patch httplib by making ThreadPool constructor more solid on pthread_create failures by @carlopi in https://github.com/duckdb/duckdb/pull/22516
Fix duck fuzz #4430 by @dentiny in https://github.com/duckdb/duckdb/pull/22435
Test runner: avoid running clean-up routine if there is no database to run it in by @Mytherin in https://github.com/duckdb/duckdb/pull/22540
Fix bare numeric interval parsing at end of string on v1.5 by @M1llerF in https://github.com/duckdb/duckdb/pull/22534
Fix parquet metadata cache validation by @dentiny in https://github.com/duckdb/duckdb/pull/22547
ExtensionInstall: Remove use of IsHTTP to IsRemoteFile by @carlopi in https://github.com/duckdb/duckdb/pull/21900
Fix variant write small decimal by @dentiny in https://github.com/duckdb/duckdb/pull/22544
Move http_proxy setting to global setting, and use GetEnvVariable('HTTP_PROXY') as default by @carlopi in https://github.com/duckdb/duckdb/pull/22541
Bump httpfs and remove patches by @carlopi in https://github.com/duckdb/duckdb/pull/22556
Bump Postgres, MySQL and ODBC by @staticlibs in https://github.com/duckdb/duckdb/pull/22579
Bump avro, azure, delta, ducklake, spatial, unity_catalog and vortex by @carlopi in https://github.com/duckdb/duckdb/pull/22554
Fix variant selection vector index by @dentiny in https://github.com/duckdb/duckdb/pull/22573
Fix for SIGABRT in setting size on zero-capacity vector by @ccfelius in https://github.com/duckdb/duckdb/pull/22571
Fix incorrect profiling results when using LIMIT by @sebastiaan-dev in https://github.com/duckdb/duckdb/pull/22561
Move Jemalloc into core by @Maxxen in https://github.com/duckdb/duckdb/pull/22558
Allow json ts format variation across columns - issue 22103 by @benfleis in https://github.com/duckdb/duckdb/pull/22559
Limit parallel linker jobs to avoid out-of-memory errors by @smvv in https://github.com/duckdb/duckdb/pull/22588
ARTOperator::Delete return false if rowid not found in nested ART leaf by @artjomPlaunov in https://github.com/duckdb/duckdb/pull/22591
Enable/disable jemalloc linking through BUILD/SKIP_EXTENSIONS by @Maxxen in https://github.com/duckdb/duckdb/pull/22594
Bump AWS extension by @staticlibs in https://github.com/duckdb/duckdb/pull/22600
bump spatial again by @Maxxen in https://github.com/duckdb/duckdb/pull/22602
Jemalloc is not an extension anymore by @carlopi in https://github.com/duckdb/duckdb/pull/22603
bump iceberg by @Tmonster in https://github.com/duckdb/duckdb/pull/22608
CUMULATIVE_VACUUM_TIME metric by @artjomPlaunov in https://github.com/duckdb/duckdb/pull/22425
parser_tools is apparently now a dependency for postgres by @carlopi in https://github.com/duckdb/duckdb/pull/22619
Bump DuckLake for release by @pdet in https://github.com/duckdb/duckdb/pull/22651
Bump lance to 533e0ee6cf419e4be2af3af56182fb04b87978e1 by @carlopi in https://github.com/duckdb/duckdb/pull/22640
Add storage informations for v1.5.3 by @carlopi in https://github.com/duckdb/duckdb/pull/22638
Add quack autoloading by @carlopi in https://github.com/duckdb/duckdb/pull/22631
Add quack extension by @carlopi in https://github.com/duckdb/duckdb/pull/22614
bump aws extension by @samansmink in https://github.com/duckdb/duckdb/pull/22623
bump avro+iceberg+vcpkg-duckdb-ports by @Tishj in https://github.com/duckdb/duckdb/pull/22621
optimizer: don't return truncated VARCHAR MIN/MAX from statistics by @nahomar in https://github.com/duckdb/duckdb/pull/22538
Bump excel / remove patch by @carlopi in https://github.com/duckdb/duckdb/pull/22633
Bump sqlsmith, remove patch by @carlopi in https://github.com/duckdb/duckdb/pull/22622
Fix free block for temporary file manageer by @dentiny in https://github.com/duckdb/duckdb/pull/22616
Add dummy cmake target for jemalloc by @evertlammerts in https://github.com/duckdb/duckdb/pull/22632
Bump quack by @carlopi in https://github.com/duckdb/duckdb/pull/22659
Fix invalid access for file row number by @dentiny in https://github.com/duckdb/duckdb/pull/22662
Fix enum type write to parquet by @dentiny in https://github.com/duckdb/duckdb/pull/22677
Add write_buffer_row_group_memory_limit setting which controls when to flush row groups based on memory instead of only based on row group count by @Mytherin in https://github.com/duckdb/duckdb/pull/22666
Fix max file row number by @dentiny in https://github.com/duckdb/duckdb/pull/22688
Fix new jemalloc plumbing by @mlafeldt in https://github.com/duckdb/duckdb/pull/22628
Bump DuckLake by @pdet in https://github.com/duckdb/duckdb/pull/22698
Fix timer lifetime/timing issues by @taniabogatsch in https://github.com/duckdb/duckdb/pull/22697
Enable jemalloc heap profiling with the libgcc unwinder by @mlafeldt in https://github.com/duckdb/duckdb/pull/22630
Fix jemalloc thread flush threshold check by @xuke-hat in https://github.com/duckdb/duckdb/pull/22670
Make several storage internals public by @samansmink in https://github.com/duckdb/duckdb/pull/22718
Fix GCC jemalloc symbol leakage CI failure by @lnkuiper in https://github.com/duckdb/duckdb/pull/22729
Fix iterator invalidation in ConnectionManager::GetConnectionList by @bleskes in https://github.com/duckdb/duckdb/pull/22719
Bump quack, fixes quack_serve on wasm by @carlopi in https://github.com/duckdb/duckdb/pull/22722
bump iceberg again by @Tmonster in https://github.com/duckdb/duckdb/pull/22723
fix: list_zip SEGFAULT with empty / NULL argument by @carlopi in https://github.com/duckdb/duckdb/pull/22726
Fix .sanitizer-thread-suppressions.txt jemalloc ref by @carlopi in https://github.com/duckdb/duckdb/pull/22736
Revert "Enable jemalloc heap profiling with the libgcc unwinder" by @carlopi in https://github.com/duckdb/duckdb/pull/22740
RowGroupPruner: treat UNSET LIMIT as unbounded by @ColtenOuO in https://github.com/duckdb/duckdb/pull/22744
Return an error if a negative number is passed to the factorial function by @DinosL in https://github.com/duckdb/duckdb/pull/22731

Full Changelog: https://github.com/duckdb/duckdb/compare/v1.5.2...v1.5.3