E.196.1. Migration to Version 7.4.3

A dump/restore is not required for those running 7.4.X.

E.196.2. Changes

• Fix temporary memory leak when using non-hashed aggregates (Tom)

• ECPG fixes, including some for Informix compatibility (Michael)

• Fixes for compiling with thread-safety, particularly Solaris (Bruce)

• Fix error in COPY IN termination when using the old network protocol (ljb)

• Several important fixes in pg_autovacuum, including fixes for large tables, unsigned oids, stability, temp tables, and debug mode (Matthew T. O'Connor)

• Fix problem with reading tar-format dumps on NetBSD and BSD/OS (Bruce)

• Several JDBC fixes

• Fix ALTER SEQUENCE RESTART where last_value equals the restart value (Tom)

• Repair failure to recalculate nested sub-selects (Tom)

• Fix problems with non-constant expressions in LIMIT/OFFSET

• Support FULL JOIN with no join clause, such as X FULL JOIN Y ON TRUE (Tom)

• Fix another zero-column table bug (Tom)

• Improve handling of non-qualified identifiers in GROUP BY clauses in sub-selects (Tom)

  Select-list aliases within the sub-select will now take precedence over names from outer query levels.

• Do not generate "NATURAL CROSS JOIN" when decompiling rules (Tom)

• Add checks for invalid field length in binary COPY (Tom)

  This fixes a difficult-to-exploit security hole.

• Avoid locking conflict between ANALYZE and LISTEN/NOTIFY

• Numerous translation updates (various contributors)