## E.23. Postgres Pro 9.5.4.1

Release date: 2016-08-16

### E.23.1. Overview

This release is based on PostgreSQL 9.5.4

Major enhancements over Postgres Pro 9.5.3.2 include:

- The distance semantic of the FTS phrase operator has been changed: less-or-equal replaced by exact match (For details see: Section 12.1.2).

- The predecence of the phrase operator has been changed. The operator `<->` has now higher predecence than `&` (AND) operator.

On Microsoft Windows systems:

- The WinEditLine library is integrated to implement autocomplete in psql console. The psql default encoding is changed to UTF-8.

### E.23.2. Migration to Version 9.5.4.1

A dump/restore is not required for those running 9.5.3.2.

However, if you are upgrading from a version earlier than 9.5.3.2 or vanilla PostgreSQL 9.5.x, some catalog changes should be applied.

If you use binary packages, and your database is in the default location, this upgrade should be performed automatically. If you've compiled Postgres Pro from source or create your database in non-default location, running `initdb` manually, you should run `pgpro_upgrade` script provided in this distribution.

Before running script, you should stop postgres service. Script should be run as user, owning the database (typically postgres) and PGDATA environment variable should be set to the directory where database resides.

### E.23.3. Potential problems

Plperl extension loading may not work on Microsoft Windows.