Announcements
* TileDB 2.18, targeted for release in November 2023, includes a preview set of aggregate pushdown APIs. The APIs will be finalized in 2.19 with performance improvements.
Disk Format
* Fix the format specification for group members. [4380](https://github.com/TileDB-Inc/TileDB/pull/4380)
* Update fragment format spec for info on tile sizes and tile offsets. [4416](https://github.com/TileDB-Inc/TileDB/pull/4416)
Configuration changes
* Remove vfs.file.max_parallel_ops config option. [3964](https://github.com/TileDB-Inc/TileDB/pull/3964)
Breaking C API changes
* Behavior breaking change: `tiledb_group_remove_member` cannot remove named members by URI if the URI is duplicated. [4391](https://github.com/TileDB-Inc/TileDB/pull/4391)
New features
* Support custom headers on s3 requests. [4400](https://github.com/TileDB-Inc/TileDB/pull/4400)
* Add support for Google Cloud Storage on Windows. [4138](https://github.com/TileDB-Inc/TileDB/pull/4138)
* Query aggregates REST support. [4415](https://github.com/TileDB-Inc/TileDB/pull/4415)
* Add random number generator global singleton. [4437](https://github.com/TileDB-Inc/TileDB/pull/4437)
Improvements
* Add an aspect template argument to `class CAPIFunction`. [4430](https://github.com/TileDB-Inc/TileDB/pull/4430)
* Fix enumeration value not found error message. [4339](https://github.com/TileDB-Inc/TileDB/pull/4339)
* Allow forward slashes in enumeration names. [4454](https://github.com/TileDB-Inc/TileDB/pull/4454)
* Adding extra in memory offset for var tiles on read path. [4294](https://github.com/TileDB-Inc/TileDB/pull/4294)
* Aggregators: adding mean aggregate. [4292](https://github.com/TileDB-Inc/TileDB/pull/4292)
* Remove parallel file I/O. [3964](https://github.com/TileDB-Inc/TileDB/pull/3964)
* C.41 constructor: S3. [4368](https://github.com/TileDB-Inc/TileDB/pull/4368)
* Changed the logic of the main loop in `Domain::cell_order_cmp_impl<char>`. [3847](https://github.com/TileDB-Inc/TileDB/pull/3847)
* Add REST client support for delete_fragments and delete_fragments_list. [3923](https://github.com/TileDB-Inc/TileDB/pull/3923)
* Remove the internal `ValidityVector::init_bytemap` method. [4071](https://github.com/TileDB-Inc/TileDB/pull/4071)
* Use exceptions for error handling in the Metadata code. [4012](https://github.com/TileDB-Inc/TileDB/pull/4012)
* Move min/max computation to aggregate_with_count. [4394](https://github.com/TileDB-Inc/TileDB/pull/4394)
* Add memory tracking to Enumeration loading. [4395](https://github.com/TileDB-Inc/TileDB/pull/4395)
* Logs for nested exceptions now incorporate all messages. [4393](https://github.com/TileDB-Inc/TileDB/pull/4393)
* Implement read logging modes. [4386](https://github.com/TileDB-Inc/TileDB/pull/4386)
* Move counts computation to aggregate_with_count. [4401](https://github.com/TileDB-Inc/TileDB/pull/4401)
* Fix delete_fragments handlers according to new model. [4414](https://github.com/TileDB-Inc/TileDB/pull/4414)
* Aggregates: change to use size instead of min cell/max cell. [4436](https://github.com/TileDB-Inc/TileDB/pull/4436)
* Allow for empty enumerations. [4423](https://github.com/TileDB-Inc/TileDB/pull/4423)
* Aggregates: combine sum/mean aggregators. [4440](https://github.com/TileDB-Inc/TileDB/pull/4440)
Documentation
* Update docs for set data buffer APIs. [4381](https://github.com/TileDB-Inc/TileDB/pull/4381)
Defects removed
* Fix serialization of empty enumerations. [4472](https://github.com/TileDB-Inc/TileDB/pull/4472)
* Patch curl to fix CVE-2023-38545. [4408](https://github.com/TileDB-Inc/TileDB/pull/4408)
* Update libwebp to version 1.3.2 to fix CVE-2023-5129. [4384](https://github.com/TileDB-Inc/TileDB/pull/4384)
* Fix missing WebP::sharpyuv installation command. [4325](https://github.com/TileDB-Inc/TileDB/pull/4325)
* Fix re-loading enumerations from the REST server. [4335](https://github.com/TileDB-Inc/TileDB/pull/4335)
* Save error on the context before returning error code in vfs_open. [4347](https://github.com/TileDB-Inc/TileDB/pull/4347)
* Filter pipeline: fix coord filter type. [4351](https://github.com/TileDB-Inc/TileDB/pull/4351)
* Fix creation of Enumerations with `std::vector<bool>`. [4362](https://github.com/TileDB-Inc/TileDB/pull/4362)
* Revert change to S3 is_object, is_bucket checks. [4370](https://github.com/TileDB-Inc/TileDB/pull/4370)
* Specify whether the HDFS backend is enabled in the string returned by `tiledb_as_built_dump`. [4364](https://github.com/TileDB-Inc/TileDB/pull/4364)
* Fix fragment corruption in the GlobalOrderWriter. [4383](https://github.com/TileDB-Inc/TileDB/pull/4383)
* Fix bug in FragmentMetadata::get_footer_size. [4212](https://github.com/TileDB-Inc/TileDB/pull/4212)
* Global order writer: don't try to delete the current fragment if it had failed to be created. [4052](https://github.com/TileDB-Inc/TileDB/pull/4052)
* Fix bug in ordered label reader for unsigned integers. [4404](https://github.com/TileDB-Inc/TileDB/pull/4404)
* Add missing include object.h in group_experimental.h. [4411](https://github.com/TileDB-Inc/TileDB/pull/4411)
* Support Azure Storage SAS tokens that don't start with a question mark. [4418](https://github.com/TileDB-Inc/TileDB/pull/4418)
* Avoid empty Enumeration REST requests. [4369](https://github.com/TileDB-Inc/TileDB/pull/4369)
* Make the `initializer_list` overload of `Subarray::set_subarray` zero-copy. [4062](https://github.com/TileDB-Inc/TileDB/pull/4062)
API changes
C API
* New: Aggregate pushdown C API. [4176](https://github.com/TileDB-Inc/TileDB/pull/4176)
* Implement tiledb_handle_load_array_schema_request. [4399](https://github.com/TileDB-Inc/TileDB/pull/4399)
* Add ArraySchemaEvolution::extend_enumeration. [4445](https://github.com/TileDB-Inc/TileDB/pull/4445)
* Allow null cfg in group consolidate_metadata and vacuum_metadata. [4412](https://github.com/TileDB-Inc/TileDB/pull/4412)
C++ API
* Fix UBSAN error in the Enumeration CPP API. [4357](https://github.com/TileDB-Inc/TileDB/pull/4357)
* Remove default operation type from query condition set membership API (introduced in 2.17). [4390](https://github.com/TileDB-Inc/TileDB/pull/4390)
* Fix CPP set buffer APIs to work with aggregates. [4434](https://github.com/TileDB-Inc/TileDB/pull/4434)
* Adding CPP example for consolidation plan. [4433](https://github.com/TileDB-Inc/TileDB/pull/4433)
* New: Aggregate API for MEAN and NULL_COUNT capi/cppapi wraps. [4443](https://github.com/TileDB-Inc/TileDB/pull/4443)
Build System Changes
* Fix static linking failures and build ExampleExe_static on Windows. [4336](https://github.com/TileDB-Inc/TileDB/pull/4336)
* Run Windows nightly debug build on C:/ drive to avoid out of space errors. [4352](https://github.com/TileDB-Inc/TileDB/pull/4352)
* Manage dependencies with vcpkg by default. [4348](https://github.com/TileDB-Inc/TileDB/pull/4348)
* Find the OpenSSL dependency of the AWS SDK on non-Windows only. [4359](https://github.com/TileDB-Inc/TileDB/pull/4359)
* Use generator expressions when setting compile options for the benchmarks. [4328](https://github.com/TileDB-Inc/TileDB/pull/4328)
* Bump default compiler to GCC 10 and macos images from 11 to 12. [4367](https://github.com/TileDB-Inc/TileDB/pull/4367)
* Fix and optimize the Release CI workflow. [4373](https://github.com/TileDB-Inc/TileDB/pull/4373)
* Stop building gRPC when GCS is enabled. [4435](https://github.com/TileDB-Inc/TileDB/pull/4435)
* Require only ucrt build from Rtools. [4361](https://github.com/TileDB-Inc/TileDB/pull/4361)
* Update the AWS SDK to version 1.11.160. [4214](https://github.com/TileDB-Inc/TileDB/pull/4214)
* Remove warnings from benchmarks. [4396](https://github.com/TileDB-Inc/TileDB/pull/4396)
* Update `clang-format` to version 16. [4397](https://github.com/TileDB-Inc/TileDB/pull/4397)
* Update the Google Cloud Storage SDK to its latest version (2.15.1). [4031](https://github.com/TileDB-Inc/TileDB/pull/4031)
* Update capnproto to version 1.0.1. [4405](https://github.com/TileDB-Inc/TileDB/pull/4405)
* Fix compilation with GCC 13. [4331](https://github.com/TileDB-Inc/TileDB/pull/4331)
* Compilation fix for GCC 9.4 of Ubuntu 20.04. [4355](https://github.com/TileDB-Inc/TileDB/pull/4355)
* Don't error out if DELETE symbol is defined. [4365](https://github.com/TileDB-Inc/TileDB/pull/4365)
Test only changes
* Aggregates pushdown: adding tests for var size buffer overflow. [4315](https://github.com/TileDB-Inc/TileDB/pull/4315)
* Aggregates pushdown: adding incomplete tests. [4301](https://github.com/TileDB-Inc/TileDB/pull/4301)
* Add group backwards compatibility tests. [3996](https://github.com/TileDB-Inc/TileDB/pull/3996)
* Aggregates: Adding tests for computation policies. [4421](https://github.com/TileDB-Inc/TileDB/pull/4421)
* Aggregators: adding benchmark for aggregate_with_count class. [4420](https://github.com/TileDB-Inc/TileDB/pull/4420)
Experimental Changes
* Add support for basic mimo node to TileDB task graph. [3977](https://github.com/TileDB-Inc/TileDB/pull/3977)
* Verify that dependency-only edges using `std::monostate` work with nodes and edges. [3939](https://github.com/TileDB-Inc/TileDB/pull/3939)