https://bugzilla.wikimedia.org/show_bug.cgi?id=27774
Summary: Username to user_id match is inconsistent in revisions
of dump.
Product: XML Snapshots
Version: unspecified
Platform: All
OS/Version: All
Status: NEW
Keywords: analytics
Severity: enhancement
Priority: Normal
Component: General
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Username to user_id match is inconsistent in revisions of dump.
This could be a characteristic of how and when the username field gets updated
in the revision table. If so, it would be nice to have a clear explanation of
what things to expect (e.g. deleted users, username changes, etc).
We see a range of inconsistencies along the lines of many usernames matched
with the same ID, many IDs matched with the same username, non-ip usernames
with no ID and completely missing user information.
Our approach is to associate a user_id with its most recent username and
propagate this username to all instances of user_id.
Proposed solution:
1) Run SQL query to synchronize usernames with userids.
2) Run SQL query to replace cases hostname is the username.
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