E.20. Postgres Pro Standard 11.7.1
Release Date: 2020-02-27
E.20.1. Overview
This release is based onPostgreSQL 11.7 andPostgres Pro Standard 11.6.1. All improvements inherited fromPostgreSQL 11.7 are listed inPostgreSQL 11.7 Release Notes.
Major enhancements overPostgres Pro Standard 11.6.1 include:
Added theenable_compound_index_stats configuration parameter to control the use of compound indexes statistics for selectivity estimation.
Increased the maximum value of thetrack_activity_query_size parameter to 1MB. In vanillaPostgreSQL, this change is targeted for version 13.
Improved query performance with row-level security policy enabled by correctly marking numeric comparison functions as leakproof.
Fixed planner's optimization to correctly take into account similar
ORclauses if they reference columns that are different, but have the same position in different indexes.Fixed self join removal functionality to achieve better stability.
Optimized execution of queries with Materialize nodes that return nothing; now such nodes are called only once and skipped in all the subsequent runs.
Fixed the
mcharextension to correctly handle theESCAPEclause inSIMILAR TOregular expressions.Upgradedpg_probackup to version 2.2.7.
Upgradedmamonsu to version 2.4.4.
E.20.2. Migration to Version 11.7.1
If you are upgrading fromPostgres Pro Standard based on the samePostgreSQL major version, it is enough to install the new version into your current installation directory.
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 11.6.1 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 11.7.1 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
Version 11.7.1 also fixesSIMILAR TO and POSIX regular expressions that use character classes for icu collations, so you may need to check for objects that use such regular expressions.
Starting fromPostgres Pro Standard 11.6.1, the ICU library upgrade does not interfere with the server start. Before connecting to a database using ICU as the default collation,Postgres Pro compares this collation version to the one provided by the ICU library and displays a warning if the collation versions do not match; you may need to rebuild the objects that depend on the default collation if you think the collation change may affect the sort order of your data. To suppress these warnings, you can use theALTER COLLATION "default" REFRESH VERSION command, as explained inALTER COLLATION.
Sincepg_probackup delivery model changed inPostgres Pro Standard 11.2.1, 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.
To migrate fromPostgreSQL or aPostgres Pro Standard release based on a previousPostgreSQL major version, see themigration instructions for version 11. If you are opting for a dump/restore, make sure to use the--add-collprovider option to correctly choose the provider for the default collation of the migrated database.