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E.5. Postgres Pro Standard 12.18.1
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E.5. Postgres Pro Standard 12.18.1

E.5.1. Overview
E.5.2. Migration to Version 12.18.1

Release Date: 2024-02-14

E.5.1. Overview

This release is based on PostgreSQL 12.18 and Postgres Pro Standard 12.17.1. All improvements inherited from PostgreSQL 12.18 are listed in PostgreSQL 12.18 Release Notes. Other major changes and enhancements are as follows:

  • Added configuration parameters to enable getting information on crashes of a backend. The crash_info parameter turns on this functionality, while crash_info_dump and crash_info_location specify the contents and location of crash information files, respectively.

  • Added -m, -o and -x options to initdb for testing database upgrades with custom initial xid, multixid and multixid offset values. These options were previously available only in Postgres Pro Enterprise.

  • Optimized memory consumption during selectivity estimation for each array element as compared to vanilla PostgreSQL.

  • Fixed the race condition between the autovacuum worker and backend processes when clearing orphaned tables, which could manifest itself in “cache lookup failed for relation” errors. Now autovacuum locks the namespaces when clearing orphaned tables.

  • Fixed an issue that could occur during installation of a Postgres Pro server on Debian-based systems included in a domain with the postgres user.

  • Fixed the output of pg-setup, which erroneously displayed the locale from the LANG environment variable at cluster initialization. Now the message about locale is not displayed at this stage.

  • Ended support for Rosa Enterprise Linux Server 7.

  • Ended support for ROSA COBALT (server edition) based on Rosa platform 7.

  • Upgraded orafce to version 4.9.1.

  • Upgraded pg_filedump to version 16.1.

  • Upgraded pg_probackup to version 2.7.2, which provides optimizations and bug fixes:

    • Fixed an issue that occurred during an incremental backup when a table that was not yet copied got removed from CFS.

    • Fixed the order of processing WAL files by the archive-push command when the number of WAL files exceeds the specified --batch-size.

    • Fixed an error “WAL segment is absent” that could occur when the size of a WAL record being logged exceeded the size of a WAL segment.

  • Upgraded pg_repack to version 1.5.0.

  • Upgraded pg_variables, which now provides iterator functionality for any collections, as well as functions to work with general collection variables. These functions allow accessing collection elements by a key that can have either integer or text type. These enhancements facilitate migration of Oracle code that processes collections.

  • Upgraded pgpro_stats to version 1.7, which provides optimizations and bug fixes:

    • Similarly to a pg_stat_statements fix, changed pgpro_stats to read its “query texts” file in units of at most 1GB. Such large query text files are very unusual, but if they do occur, the previous coding would fail on Windows 64 (which rejects individual read requests of more than 2GB).

    • Implemented backward compatibility of pgpro_stats_statements and pgpro_stats_totals functions. Now a newer version of the pgpro_stats shared library can be safely used with old declarations of SQL functions. Previously such cases caused a server crash.

    • Fixed an issue that prevented output of database vacuuming statistics in the pgpro_stats_vacuum_database view.

  • Upgraded pgpro_pwr to version 4.4, which supports pgpro_stats 1.7, as well as adds more interactive features and substring-based filtering to the report.

E.5.2. Migration to Version 12.18.1

If you are upgrading from Postgres Pro Standard based on the same PostgreSQL major version, it is enough to install the new version into your current installation directory.

While functions numeric_eq, numeric_ne, numeric_gt, numeric_ge, numeric_lt, and numeric_le are actually leakproof, they were not marked as such in Postgres Pro Standard 12.1.1, which could lead to incorrect query optimization. In particular, it negatively affected query execution if row-level security policy was in use. Version 12.2.1 repairs this issue for new installations by correcting the initial catalog data, but existing installations will still have incorrect markings unless you update pg_proc entries for these functions. You can run pg_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 the ALTER FUNCTION command. For example: 

ALTER FUNCTION pg_catalog.numeric_eq LEAKPROOF

When upgrading from Postgres Pro versions 12.6.1 or lower, rebuild indexes containing at least one included column of type for which the collation was defined in the table.

If you are upgrading from Postgres Pro versions 12.6.2 or lower and take PTRACK backups using pg_probackup, retake a full backup after upgrade.

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