E.40.1. Migration to version 7.4.11

A dump/restore is not required for those running 7.4.X. However, if you are upgrading from a version earlier than 7.4.8, see the release notes for 7.4.8. Also, you might need to REINDEX indexes on textual columns after updating, if you are affected by the locale or plperl issues described below.

E.40.2. Changes

• Fix for protocol-level Describe messages issued outside a transaction or in a failed transaction (Tom)

• Fix character string comparison for locales that consider different character combinations as equal, such as Hungarian (Tom)

  This might require REINDEX to fix existing indexes on textual columns.

• Set locale environment variables during postmaster startup to ensure that plperl won't change the locale later

  This fixes a problem that occurred if the postmaster was started with environment variables specifying a different locale than what initdb had been told. Under these conditions, any use of plperl was likely to lead to corrupt indexes. You might need REINDEX to fix existing indexes on textual columns if this has happened to you.

• Fix longstanding bug in strpos() and regular expression handling in certain rarely used Asian multi-byte character sets (Tatsuo)

• Fix bug in /contrib/pgcrypto gen_salt, which caused it not to use all available salt space for MD5 and XDES algorithms (Marko Kreen, Solar Designer)

  Salts for Blowfish and standard DES are unaffected.

• Fix /contrib/dblink to throw an error, rather than crashing, when the number of columns specified is different from what's actually returned by the query (Joe)