E.270. Release 8.0.4
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## E.270. Release 8.0.4

Release date: 2005-10-04

This release contains a variety of fixes from 8.0.3. For information about new features in the 8.0 major release, see Section E.274.

### E.270.1. Migration to Version 8.0.4

A dump/restore is not required for those running 8.0.X. However, if you are upgrading from a version earlier than 8.0.3, see Section E.271.

### E.270.2. 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.

- Force a checkpoint before committing `CREATE DATABASE`

  This should fix recent reports of “index is not a btree” failures when a crash occurs shortly after `CREATE DATABASE`.

- Fix the sense of the test for read-only transaction in `COPY`

  The code formerly prohibited `COPY TO`, where it should prohibit `COPY FROM`.

- Handle consecutive embedded newlines in `COPY` CSV-mode input

- Fix `date_trunc(week)` for dates near year end

- Fix planning problem with outer-join ON clauses that reference only the inner-side relation

- Further fixes for `x FULL JOIN y ON true` corner cases

- Fix overenthusiastic optimization of `x IN (SELECT DISTINCT ...)` and related cases

- Fix mis-planning of queries with small `LIMIT` values due to poorly thought out “fuzzy” cost comparison

- Make `array_in` and `array_recv` more paranoid about validating their OID parameter

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

- Improve robustness of datetime parsing

- Improve checking for partially-written WAL pages

- Improve robustness of signal handling when SSL is enabled

- Improve MIPS and M68K spinlock code

- Don't try to open more than `max_files_per_process` files during postmaster startup

- Various memory leakage fixes

- Various portability improvements

- Update timezone data files

- Improve handling of DLL load failures on Windows

- Improve random-number generation on Windows

- Make `psql -f filename` return a nonzero exit code when opening the file fails

- Change pg_dump to handle inherited check constraints more reliably

- Fix password prompting in pg_restore on Windows

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

- Fix PL/Perl `%_SHARED` so it's actually shared

- Fix `contrib/pg_autovacuum` to allow sleep intervals over 2000 sec

- Update `contrib/tsearch2` to use current Snowball code

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