https://bugzilla.wikimedia.org/show_bug.cgi?id=72842

            Bug ID: 72842
           Summary: Remove null constraints in preparation for removal
           Product: Wikimedia
           Version: wmf-deployment
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: Unprioritized
         Component: General/Unknown
          Assignee: [email protected]
          Reporter: [email protected]
       Web browser: ---
   Mobile Platform: ---

Short description:

The workflow_user_* fields of the flow_workflow table are being dropped in the
gerrit patch linked below.  In preparation for the patch that stops inserting
data into these rows the null constraints need to be removed. A followup
request will be filed to drop the fields.

Which wikis are affected:

currently flow data is shared between wikis in flowdb on the extension1db
cluster

Which tables:

flow_workflow

What is the change to those tables:

ALTER TABLE /*_*/flow_workflow
      CHANGE workflow_user_id workflow_user_id bigint(20) unsigned default
null,
      CHANGE workflow_user_wiki workflow_user_wiki varbinary(32) default null; 

Links to gerrit changes and/or other related bug reports.

https://gerrit.wikimedia.org/r/#/c/170503
https://gerrit.wikimedia.org/r/#/c/168553/

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