PostgreSQL 9.3.0 Documentation
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# E.20. Release 9.0.10

> Release Date: 2012-09-24

This release contains a variety of fixes from 9.0.9. For information about new features in the 9.0 major release, see Section E.30.

## E.20.1. Migration to Version 9.0.10

A dump/restore is not required for those running 9.0.X.

However, if you are upgrading from a version earlier than 9.0.6, see the release notes for 9.0.6.

## E.20.2. Changes

- Fix planner's assignment of executor parameters, and fix executor's rescan logic for CTE plan nodes (Tom Lane)

  These errors could result in wrong answers from queries that scan the same `WITH` subquery multiple times.

- Improve page-splitting decisions in GiST indexes (Alexander Korotkov, Robert Haas, Tom Lane)

  Multi-column GiST indexes might suffer unexpected bloat due to this error.

- Fix cascading privilege revoke to stop if privileges are still held (Tom Lane)

  If we revoke a grant option from some role `X`, but `X` still holds that option via a grant from someone else, we should not recursively revoke the corresponding privilege from role(s) `Y` that `X` had granted it to.

- Improve error messages for Hot Standby misconfiguration errors (Gurjeet Singh)

- Fix handling of `SIGFPE` when PL/Perl is in use (Andres Freund)

  Perl resets the process's `SIGFPE` handler to `SIG_IGN`, which could result in crashes later on. Restore the normal Postgres signal handler after initializing PL/Perl.

- Prevent PL/Perl from crashing if a recursive PL/Perl function is redefined while being executed (Tom Lane)

- Work around possible misoptimization in PL/Perl (Tom Lane)

  Some Linux distributions contain an incorrect version of `pthread.h` that results in incorrect compiled code in PL/Perl, leading to crashes if a PL/Perl function calls another one that throws an error.

- Fix pg_upgrade's handling of line endings on Windows (Andrew Dunstan)

  Previously, pg_upgrade might add or remove carriage returns in places such as function bodies.

- On Windows, make pg_upgrade use backslash path separators in the scripts it emits (Andrew Dunstan)

- Update time zone data files to tzdata release 2012f for DST law changes in Fiji

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