PostgreSQL 9.1.2 Documentation
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# E.156. Release 7.3.11

> Release Date: 2005-10-04

This release contains a variety of fixes from 7.3.10.

## E.156.1. Migration to Version 7.3.11

A dump/restore is not required for those running 7.3.X. However, if you are upgrading from a version earlier than 7.3.10, see the release notes for 7.3.10.

## E.156.2. Changes

- Fix error that allowed `VACUUM` to remove `ctid` chains too soon, and add more checking in code that follows `ctid` links

  This fixes a long-standing problem that could cause crashes in very rare circumstances.

- Fix `CHAR()` to properly pad spaces to the specified length when using a multiple-byte character set (Yoshiyuki Asaba)

  In prior releases, the padding of `CHAR()` was incorrect because it only padded to the specified number of bytes without considering how many characters were stored.

- Fix missing rows in queries like `UPDATE a=... WHERE a...` with GiST index on column `a`

- Improve checking for partially-written WAL pages

- Improve robustness of signal handling when SSL is enabled

- Various memory leakage fixes

- Various portability improvements

- Fix PL/pgSQL to handle `var := var` correctly when the variable is of pass-by-reference type

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