The MonetDB Foundation is pleased to announce the Dec2023-SP2 bugfix release of the MonetDB suite of programs.

More information about MonetDB can be found on our website at https://www.monetdb.org/.

For details on this release, please see the release notes at https://www.monetdb.org/release-notes/dec2023/.

As usual, the download location is https://www.monetdb.org/downloads/.

### MonetDB Common

- Threads have their own list of free bats. The list was not returned to the system when a thread exited, meaning that the free bats that were in the list would not be reused by any thread. This has been fixed.

- Fixed a couple of deadlock situations, one actually observed, one never observed.

### MonetDB5 Server

- Fixed interaction between mserver5 and remote mserver5 when only one of the two has 128 bit integer support.

### SQL Frontend

- Fixed issue where equal column aliases were created. When those aliases were parsed on the remote side it could give crashes.

### Bug Fixes

- [7469](https://github.com/MonetDB/MonetDB/issues/7469): Crash when using `CONTAINS`

- [7479](https://github.com/MonetDB/MonetDB/issues/7479): MonetDB server crashes in `exp_ref`

- [7490](https://github.com/MonetDB/MonetDB/issues/7490): commonTerms optimizer no longer works

- [7495](https://github.com/MonetDB/MonetDB/issues/7495): Crash when simultaneously querying and updating a string column.