rails/rails — pull request #15156 by sgrif (2014-05-17 20:06:33+00:00)
Title: PostgreSQL timestamps should always be datetimes

The current behavior is that they are treated as `datetime` normally,
but if they are part of an array, they are treated as `timestamp`. The
only place that seems to be impacted by this is schema dumping, which
shouldn't matter since `t.datetime` and `t.timestamp` are equivalent in
the `PostgreSQL` adapter, anyway.