Summary:
Ref T1279. This came to me in a dream.
The existing `differential_relationship` table has an `(objectPHID, type)` column, which theoretically is useful for queries like "revisions with X as a reviewer". In practice, I'm not sure it gets used much, but I can get it to show up in at least some query plans.
Add a similar index to the `edge` table. This sequences //before// D7227, which actually migrates the data.
Test Plan:
- Ran `bin/storage upgrade`.
- EXPLAIN'd a bunch of queries against different versions of the schema, this seemed helpful overall.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T1279
Differential Revision: https://secure.phabricator.com/D7232
Conflicts:
src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php
