PostgreSQL 12 RC 1 Released!

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From: "Jonathan S. Katz" <[email protected]>
To: [email protected]
Message-ID: <[email protected]>
Subject: PostgreSQL 12 RC 1 Released!

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The PostgreSQL Global Development Group announces that the first release
candidate of PostgreSQL 12 is now available for download. As a release
candidate, PostgreSQL 12 RC 1 should be identical to the initial release
of PostgreSQL 12, though some more fixes may be applied prior to the
general availability of PostgreSQL 12.

The planned date for the general availability of PostgreSQL 12 is
October 3, 2019. Please see the "Release Schedule" section for more detai=
ls.

Upgrading to PostgreSQL 12 RC 1
-------------------------------

To upgrade to PostgreSQL 12 RC 1 from Beta 4 or an earlier version of
PostgreSQL 12, 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/12/static/upgrading.html

Changes Since 12 Beta 4
-----------------------

There have been many bug fixes for PostgreSQL 12 reported during the
Beta 4 period and applied to this release candidate. These include:

* Add additional "leakproof" markings to certain string functions to
better support nondeterministic collations. This can positively impact
the performance of some query plans
* Removal of the ECPG `DECLARE STATEMENT` functionality
* The ecpglib major version change was reverted
* Fix handling of nondeterministic collations with pattern_ops opclasses

For a detailed list of fixes, please visit the open items page:

https://wiki.postgresql.org/wiki/PostgreSQL_12_Open_Items#resolved_before=
_12rc1

Release Schedule
----------------

This is the first release candidate for PostgreSQL 12. Unless an issue
is discovered that warrants a delay or to produce an additional release
candidate, PostgreSQL 12 should be made generally available on October
3, 2019.

For further information please see the beta testing page:

https://www.postgresql.org/developer/beta/

Links
-----

* Download: https://www.postgresql.org/download/
* Beta Testing Information: https://www.postgresql.org/developer/beta/
* PostgreSQL 12 Beta Release Notes:
https://www.postgresql.org/docs/devel/release-12.html
* PostgreSQL 12 Open Issues:
https://wiki.postgresql.org/wiki/PostgreSQL_12_Open_Items
* Submit a Bug: https://www.postgresql.org/account/submitbug/
* Follow @postgresql on Twitter: https://twitter.com/postgresql


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