mozilla/socorro — pull request #1301 by selenamarie (2013-06-18 15:13:53+00:00)
Title: bug 884348 Make is_gc_count column add fast

Separate the column creation and constraint addition to make this schema migration fast. Also remove the 'not null' constraint so that we don't put zeros into this column going back to 2011.

The production table is 2 GB and kinda slow for adding constrained new columns.