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epriestley 6d36eb9113 Denormalize Diff PHIDs onto Revisions
Summary:
Ref T12539. See PHI190. Currently, each Diff has a `revisionID`, but Revisions do not point at the current active diff. To find the active diff for a given revision, we need to issue a separate query.

Furthermore, this query is inefficient for bulk loads: if we have a lot of revisions, we end up querying for all diff IDs for all those revisions first, then selecting the largest ones and querying again to get the actual diff objects. This strategy could likely be optimized but the query is a mess in any case.

In several cases, it's useful to have the active diff PHID without needing to do a second query -- sometimes for convenience, and sometimes for performance.

T12539 is an example of such a case: it would be nice to refine the bucketing logic (which only depends on active diff PHIDs), but it feels bad to make the page heavier to do it.

For now, this is unused. I'll start using it to fix the bucketing issue, and then we can expand it gradually to address other performance/convenience issues.

Test Plan:
  - Ran migrations, inspected database, saw sensible values.
  - Created a new revision, saw a sensible database value.
  - Updated an existing revision, saw database update properly.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T12539

Differential Revision: https://secure.phabricator.com/D18756
2017-11-01 17:19:38 -07:00
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conf Support "ssl.chain" in Aphlict configuration 2016-04-14 10:41:21 -07:00
externals Add profile images to Repositories 2017-06-12 07:51:39 -07:00
resources Denormalize Diff PHIDs onto Revisions 2017-11-01 17:19:38 -07:00
scripts Fix spelling 2017-10-09 10:48:04 -07:00
src Denormalize Diff PHIDs onto Revisions 2017-11-01 17:19:38 -07:00
support Tweak rate limiting point counts for omnipotent users 2017-10-16 06:43:54 -07:00
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.editorconfig Fix text lint issues 2015-02-12 07:00:13 +11:00
.gitignore Make i18n string extraction faster and more flexible 2016-07-04 10:23:30 -07:00
LICENSE Fix text lint issues 2015-02-12 07:00:13 +11:00
NOTICE Update Phabricator NOTICE file to reflect modern legal circumstances 2014-06-25 13:42:13 -07:00
README.md Remove push to IRC from "readme.md" too 2015-10-24 18:39:16 -07:00

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