2026-06-17

Announcing DuckDB 1.5.4 (Variegata)

The DuckDB team

We are simultaneously releasing two DuckDB versions: v1.4.5 LTS (Andium) and v1.5.4 (Variegata). This blog post is about the latest non-LTS version, v1.5.4 (Variegata). If you are looking for the LTS version, check out the v1.4.5 (Andium) announcement.

In this blog post, we highlight a few important fixes in DuckDB v1.5.4, the fifth patch release in DuckDB’s 1.5 (Variegata) line. The release ships bugfixes, performance improvements and security patches. You can find the full release notes on GitHub.

To install the new version, please visit the installation page.

Fixes

This version ships a number of performance improvements and bugfixes.

Correctness

#23031 – Fix VARIANT cast reading wrong rows under a filter
#23014 – MERGE INTO: only consider target table when binding WHEN NOT MATCHED and source table when binding WHEN NOT MATCHED BY TARGET
#22825 – Fix case-insensitive column match in INSERT … SELECT ON CONFLICT
#22911 – Use non-deleted row count in RowGroupReorderer
#23194 – Fix variant shredding analysis logic discrepancy with shredded writing
#23234 – Fix problem with re-use of cached transform data for differently shredded files
#22844 – Window Self-Join Limits: don’t apply the self-join optimisation more than once

Crashes and Internal Errors

#21854 – Fix double free and memory leak in Arrow GeoArrow CRS serialization
#22836 – Fix progress bar output and crash when piping SQL
#23174 – Fix crash when storage path is not set
#23232 – Fix gzip compression write overflow
#23156 – Avoid trying to bind an expression that doesn’t exist in UNPIVOT
#23189 – Guard against null row group reorder stats

Generic Bugfixes

#22855 – Fix json_keys with wildcard paths
#23144 – Fix json argument order affecting result
#23116 – Reject NULL json key
#23137 – Fix ignore_errors silently accepting invalid JSON
#22882 – Fix geometry stats checkpointing when no changes are detected
#22815 – Render MAP values as valid SQL in Value::ToSQLString()
#23254 – Fix NULL propagation for date parts of infinite dates
#23190 – Fix selection vector use in Arrow extension callbacks

Performance

#23253 – Trim the system heap in the allocator flush path on jemalloc builds
#23140 – Fix native geometry Parquet stats pruning and add OPERATOR_ROW_GROUPS_SCANNED to Parquet reader

Miscellaneous

#23246 – Add explicit -dark-mode and -light-mode options to the CLI, and improve terminal background color detection
#23100 – Add hardening to many DuckDB/Parquet decompression and deserializing paths
#22690 – Add vacuum_rebuild_indexes as an (experimental) ATTACH option

Conclusion

This post was a short summary of the changes in v1.5.4. As usual, you can find the full release notes on GitHub. We would like to thank our contributors for providing detailed issue reports and patches. Stay tuned for future DuckDB releases, including v2.0.0 in the fall!

PS: Next week, we’ll host DuckCon #7 in Amsterdam. Join us in-person or on the online stream.