This update for postgresql94 to version 9.4.9 fixes the several issues.
These security issues were fixed: - CVE-2016-5423: CASE/WHEN with inlining can cause untrusted pointer dereference (bsc#993454). - CVE-2016-5424: Fix client programs' handling of special characters in database and role names (bsc#993453).
For the non-security issues please refer to - http://www.postgresql.org/docs/9.4/static/release-9-4-9.html - http://www.postgresql.org/docs/9.4/static/release-9-4-8.html - http://www.postgresql.org/docs/9.4/static/release-9-4-7.html