PostgreSQL 8.4.7 Documentation
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# E.42. Release 8.2.2

> Release date: 2007-02-05

This release contains a variety of fixes from 8.2.1, including a security fix. For information about new features in the 8.2 major release, see Section E.44.

## E.42.1. Migration to Version 8.2.2

A dump/restore is not required for those running 8.2.X.

## E.42.2. Changes

- Remove security vulnerabilities that allowed connected users to read backend memory (Tom)

  The vulnerabilities involve suppressing the normal check that a SQL function returns the data type it's declared to, and changing the data type of a table column (CVE-2007-0555, CVE-2007-0556). These errors can easily be exploited to cause a backend crash, and in principle might be used to read database content that the user should not be able to access.

- Fix not-so-rare-anymore bug wherein btree index page splits could fail due to choosing an infeasible split point (Heikki Linnakangas)

- Fix Borland C compile scripts (L Bayuk)

- Properly handle `to_char('CC')` for years ending in `00` (Tom)

  Year 2000 is in the twentieth century, not the twenty-first.

- `/contrib/tsearch2` localization improvements (Tatsuo, Teodor)

- Fix incorrect permission check in `information_schema.key_column_usage` view (Tom)

  The symptom is "relation with OID nnnnn does not exist" errors. To get this fix without using `initdb`, use `CREATE OR REPLACE VIEW` to install the corrected definition found in `share/information_schema.sql`. Note you will need to do this in each database.

- Improve `VACUUM` performance for databases with many tables (Tom)

- Fix for rare Assert() crash triggered by `UNION` (Tom)

- Fix potentially incorrect results from index searches using `ROW` inequality conditions (Tom)

- Tighten security of multi-byte character processing for UTF8 sequences over three bytes long (Tom)

- Fix bogus "permission denied" failures occurring on Windows due to attempts to fsync already-deleted files (Magnus, Tom)

- Fix bug that could cause the statistics collector to hang on Windows (Magnus)

  This would in turn lead to autovacuum not working.

- Fix possible crashes when an already-in-use PL/pgSQL function is updated (Tom)

- Improve PL/pgSQL handling of domain types (Sergiy Vyshnevetskiy, Tom)

- Fix possible errors in processing PL/pgSQL exception blocks (Tom)

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