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epriestley 0a3093ef9c Fix an issue where paginating notifications could fail a GROUP BY test
Summary:
Ref T13623. When paginating notifications, we may currently construct a query which:

  - loads from non-unique rows; and
  - returns multiple results.

In particular, `chronologicalKey` isn't unique across the whole table (only for a given viewer). We can get away with this because no user-facing view of notifications is truly "every notification for every viewer" today.

One fix would be to implicitly force the paging query to include `withUserPHIDs(viewerPHID)`, but puruse a slightly more general fix:

  - Load only unique stories.
  - Explictly limit the pagination subquery to one result.

Test Plan:
  - Set page size to 1, inserted duplicate notifications of all stories for another user, clicked "Next", got the GROUP BY error.
  - Applied the "only load unique stories" part of the change, got a "expected one row" error instead.
  - Applied the "limit 1" part of the change, got a second page of notifications.

Maniphest Tasks: T13623

Differential Revision: https://secure.phabricator.com/D21577
2021-02-26 15:11:25 -08:00
bin Remove the "ssh-auth-key" script 2019-10-28 17:52:37 -07:00
conf Remove an old digest in Celerity code and some obsolete configuration options 2019-01-04 13:43:38 -08:00
externals Update SES API to use AWSv4 signatures 2020-09-15 13:03:49 -07:00
resources Provide a more structured result log for Herald conditions 2021-02-19 11:16:21 -08:00
scripts Support an SSH error log 2021-02-26 14:54:54 -08:00
src Fix an issue where paginating notifications could fail a GROUP BY test 2021-02-26 15:11:25 -08:00
support Apply "pcre.*_limit" ini options in web environments 2021-02-19 11:16:22 -08:00
webroot Provide a more structured result log for Herald conditions 2021-02-19 11:16:21 -08:00
.arcconfig Set "history.immutable" to "false" explicitly in .arcconfig 2016-08-03 08:12:49 -07:00
.arclint Continue moving classes with no callers in libphutil or Arcanist to Phabricator 2020-02-12 13:14:04 -08:00
.arcunit Use the configuration driven unit test engine 2015-08-11 07:57:11 +10:00
.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
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