PostgreSQL 18 Beta 2 release

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+The PostgreSQL Global Development Group announces that the first beta release of
+PostgreSQL 18 is now [available for download](https://www.postgresql.org/download/).
+This release contains previews of all features when PostgreSQL 18 is made
+generally available, though some details of the release can change during the
+beta period.
+
+You can find information about all of the PostgreSQL 18 features and changes in
+the [release notes](https://www.postgresql.org/docs/18/release-18.html):
+
+  [https://www.postgresql.org/docs/18/release-18.html](https://www.postgresql.org/docs/18/release-18.html)
+
+In the spirit of the open source PostgreSQL community, we strongly encourage you
+to test the new features of PostgreSQL 18 on your systems to help us eliminate
+bugs and other issues. While we do not advise you to run PostgreSQL 18 Beta 2 in
+production environments, we encourage you to find ways to run your typical
+application workloads against this beta release.
+
+Your testing and feedback helps the community ensure that PostgreSQL 18
+upholds our standards of delivering a stable, reliable release of the
+world's most advanced open source relational database. Please read more about
+our [beta testing process](https://www.postgresql.org/developer/beta/) and how
+you can contribute:
+
+  [https://www.postgresql.org/developer/beta/](https://www.postgresql.org/developer/beta/)
+
+Upgrading to PostgreSQL 18 Beta 2
+---------------------------------
+
+To upgrade to PostgreSQL 18 Beta 2 from an earlier version of PostgreSQL,
+you will need to use a strategy similar to upgrading between major versions of
+PostgreSQL (e.g. `pg_upgrade` or `pg_dump` / `pg_restore`). For more
+information, please visit the documentation section on
+[upgrading](https://www.postgresql.org/docs/18/static/upgrading.html).
+
+Changes Since Beta 1
+--------------------
+
+Fixes and changes in PostgreSQL 18 Beta 2 include:
+
+* Add support for prepared statements in squashing lists in query jumbling.
+* Fix for foreign key validation on partitioned tables.
+* Remove `pg_get_process_memory_contexts()` function.
+* Several fixes for injection point testing to support testing AIO.
+* Fix `pg_dump` for tables with complex names.
+* Fix for statement location calculation for nested statements.
+* Fix for upgrades from PostgreSQL 14 when the number of rows in a table is
+unknown.
+* Fix stack overflow for OAuth parsers.
+* Set `pg_dump` and `pg_dumpall` default behavior to use `--no-statistics`.
+Leave the default for `pg_restore` and `pg_upgrade` to be `--with-statistics`.
+* Ensure `LOAD $libdir/` works.
+* Improvements for GIN amcheck.
+* Remove `PQservice()` from `libpq`.
+
+Please see the [release notes](https://www.postgresql.org/docs/18/release-18.html)
+for a complete list of new and changed features:
+
+[https://www.postgresql.org/docs/18/release-18.html](https://www.postgresql.org/docs/18/release-18.html)
+
+Testing for Bugs & Compatibility
+--------------------------------
+
+The stability of each PostgreSQL release greatly depends on you, the community,
+to test the upcoming version with your workloads and testing tools to find bugs
+and regressions before the general availability of PostgreSQL 18. As this is a
+Beta, minor changes to database behaviors, feature details, and APIs are still
+possible. Your feedback and testing will help determine the final tweaks on the
+new features, so please test in the near future. The quality of user testing
+helps determine when we can make a final release.
+
+A list of [open issues](https://wiki.postgresql.org/wiki/PostgreSQL_18_Open_Items)
+is publicly available in the PostgreSQL wiki.  You can
+[report bugs](https://www.postgresql.org/account/submitbug/) using this form on
+the PostgreSQL website:
+
+  [https://www.postgresql.org/account/submitbug/](https://www.postgresql.org/account/submitbug/)
+
+Beta Schedule
+-------------
+
+This is the second beta release of version 18. The PostgreSQL Project will
+release additional betas as required for testing, followed by one or more
+release candidates, until the final release around September/October 2025. For further
+information please see the [Beta Testing](https://www.postgresql.org/developer/beta/)
+page.
+
+Links
+-----
+
+* [Download](https://www.postgresql.org/download/)
+* [Beta Testing Information](https://www.postgresql.org/developer/beta/)
+* [PostgreSQL 18 Beta Release Notes](https://www.postgresql.org/docs/18/release-18.html)
+* [PostgreSQL 18 Open Issues](https://wiki.postgresql.org/wiki/PostgreSQL_18_Open_Items)
+* [Submit a Bug](https://www.postgresql.org/account/submitbug/)
+* [Donate](https://www.postgresql.org/about/donate/)