https://bugzilla.wikimedia.org/show_bug.cgi?id=64812

            Bug ID: 64812
           Summary: rc_ip needs to be a 255 character varbinary
           Product: MediaWiki
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: minor
          Priority: Unprioritized
         Component: Recent changes
          Assignee: [email protected]
          Reporter: [email protected]
       Web browser: ---
   Mobile Platform: ---

Or, at least, more than a 15-character varbinary. At the moment, there is a
hard 15-character limit on the contents of the rc_ip field in the recentchanges
table. This was fine when we were on IPv4, but IPv6 has a maximum length of 39
characters.

The result is IPv6 entries in the rc_ip field is currently being truncated,
making them of little use to anyone. While the field isn't used for anything on
production, it's a pretty common researcher/analyst resource.

Thankfully cu_changes.cuc_ip is a 255-char varbinary, and so the same problem
is not present there.

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