E.4. Postgres Pro Standard 9.6.21.1
Release date: 2021-02-18
E.4.1. Overview
This release is based onPostgreSQL 9.6.21 andPostgres Pro Standard 9.6.20.1. All improvements inherited fromPostgreSQL 9.6.21 are listed inPostgreSQL 9.6.21 Release Notes. Other major changes and enhancements are as follows:
Upgradedpg_probackup to the latest version 2.4.10. Major improvements over the previously included version 2.4.2 are as follows:
Incremental restore with
--forceflag now allows you to overwrite the contents of the directory specified byPGDATAin case of system ID mismatch. Previously this resulted in an error.It is now possible to restore and validate backups from a read-only filesystem.
In-place merge is now disabled only if the storage format changed.
Non-exclusive backup locks are implemented, which enables concurrent validate and restore. Backup shared locks are now released at the process exit.
Streamed WAL segments are now added to the backup filelist on the fly and fsynced to disk at the end of the backup.
Seepg_probackup documentation for details.
Addedpgpro_controldata utility to display control information of aPostgreSQL/Postgres Pro database cluster and compatibility information for a cluster and/or server.
Added the
pg_snapshot_anyfunction to help superusers explore corrupted databases. SeeSection 9.26.11 for details.
E.4.2. Migration to Version 9.6.21.1
Depending on your current installation, the upgrade procedure will differ.
To upgrade from aPostgres Pro Standard version based on any previousPostgreSQL major release, make sure you have installed its latest minor version, and then perform a dump/restore usingpg_dumpall or use thepg_upgrade utility.
To upgrade from aPostgres Pro Standard version based on the samePostgreSQL major release, a dump/restore is not required.
While functionsnumeric_eq,numeric_ne,numeric_gt,numeric_ge,numeric_lt, andnumeric_le are actually leakproof, they were not marked as such inPostgres Pro Standard 9.6.16.1 or lower, which could lead to incorrect query optimization. In particular, it negatively affected query execution if row-level security policy was in use. Version 9.6.17.1 repairs this issue for new installations by correcting the initial catalog data, but existing installations will still have incorrect markings unless you updatepg_proc entries for these functions. You can runpg_upgrade to upgrade your server instance to a version containing the corrected initial data, or manually correct these entries in each database of the installation using theALTER FUNCTION command. For example:
ALTER FUNCTION pg_catalog.numeric_eq LEAKPROOF
Sincepg_probackup delivery model changed inPostgres Pro Standard 9.6.12.1, when upgrading from a lower version on ALT Linux and Debian-based systems, runapt dist-upgrade (orapt-get dist-upgrade) to ensure that all new dependencies are handled correctly. On Windows, you have to run a separatepg_probackup installer to complete the upgrade.
When upgrading from versions 9.6.8.2 or lower, you must call theREINDEX command for indexes that usedmchar ormvarchar types.
If you are upgrading fromPostgres Pro Standard 9.6.7.1 or lower, you must also use thepgpro_upgrade script provided in this distribution. This script updates metadata information to handle catalog number format change introduced afterPostgres Pro Standard 9.6.4.1, as well as rename thepgpro_build function topgpro_source_id. Thepgpro_upgrade script is usually run automatically. However, if you have created your database in a non-default location, you must run thepgpro_upgrade script manually.
Note
If you runpgpro_upgrade manually, you must stop postgres service. The script must be run on behalf of the user owning the database (typically postgres). Runningpgpro_upgrade as root will result in an error. For details, seepgpro_upgrade.
Note
On RPM-based Linux distributions, if you are upgrading from version 9.6.2.1 or lower, make sure to move the data directory frompgsql to thepgpro directory before running thepgpro_upgrade script.
To migrate from vanilla PostgreSQL 9.6.x, make sure you have installed its latest available minor version and then perform a dump/restore usingpg_dumpall.