This release contains fixes from 7.4.17. For information about new features in the 7.4 major release, see Section E.153, « Release 7.4 ».
A dump/restore is not required for those running 7.4.X. However, if you are upgrading from a version earlier than 7.4.11, see Section E.142, « Release 7.4.11 ».
Prevent index corruption when a transaction inserts rows and then aborts close to the end of a concurrent VACUUM on the same table (Tom)
Make CREATE DOMAIN ... DEFAULT NULL work properly (Tom)
Fix excessive logging of SSL error messages (Tom)
Fix crash when log_min_error_statement logging runs out of memory (Tom)
Prevent CLUSTER from failing due to attempting to process temporary tables of other sessions (Alvaro)
Require non-superusers who use /contrib/dblink to use only password authentication, as a security measure (Joe)