Comment 1 for bug 1317392

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Steve Lewis (steve-lewis) wrote :

Notes gathered in research
- http://www.postgresql.org/docs/current/static/citext.html
- http://dev.mysql.com/doc/refman/5.6/en/identifier-case-sensitivity.html

PostgreSQL uses system collation, which in this case will provide POSIX behavior which is explains the behavior noted.