[openstack-dev] [all][keystone] Increase of USER_ID length maximum from 64 to 255

Clint Byrum clint at fewbar.com
Sun Mar 2 01:00:07 UTC 2014

Excerpts from Robert Collins's message of 2014-03-01 14:26:57 -0800:
> On 1 March 2014 13:28, Clint Byrum <clint at fewbar.com> wrote:
> > +1. A Keystone record belongs to Keystone, and it should have a Keystone
> > ID. External records that are linked should be linked separately.
> >
> > It may not be obvious to everyone, but MySQL uses B-trees for indexes.
> > B-trees cannot have variable-length keys.
> Hmm, B-Trees and B+-Trees both can have variable length keys. I'll
> accept an assertion that MySQL index B-trees cannot - but we should be
> precise here, because its not a global limitation.

Sorry, I misspoke, _InnoDB's_ b-tree's cannot have variable length keys.

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