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epriestley 486f7c1e8e Add aggregated facts to the Facts application 
Summary:
Some facts are aggregations of other facts. For example, we may compute how many times each macro is used in each object as a "raw fact":

  Dnnn uses macro "psyduck" 6 times.

But we want to present this data in aggregate form, e.g. "order macros by popularity". We can do this at runtime and it probably won't be too awful a query, but we can also aggregate it cheaply:

  Macro "psyduck" is used 3920 times across all objects.

...and then do a query like "select macros ordered by usage".

"Aggregate" facts support facts like this. The aggregate facts I've implemented are:

  - Count of all objects.
  - Count of objects of type X.
  - Last time facts were updated.

These clearly fit the "aggregate" facts template well. I'm not 100% sure macros do. We can use this table to answer a question like "What are the most popular macros, ordered by use?" We can also use it to answer a question like "What are the most popular macros in the last 6 months?", if we build a specific fact for that. But we can't use it to answer a question like "What are the most popular macros between times X and Y?". Maybe that's important; maybe not.

This seems like a good fit for at least some types of facts.

I'll de-magic the keys a bit in the next diff.

Test Plan: Ran the engines and got some aggregated facts about other facts.

Reviewers: vrana, btrahan

Reviewed By: vrana

CC: aran

Maniphest Tasks: T1562

Differential Revision: https://secure.phabricator.com/D3089
2012-07-27 13:46:01 -07:00
bin Add a basic "fact" application 2012-07-27 13:34:21 -07:00
conf Merge pull request #168 from ossareh/support_ldap_search_for_users 2012-07-26 14:54:10 -07:00
externals Update Javelin 2012-06-08 16:16:41 -07:00
resources Move Task <=> Revision storage to Edges 2012-07-20 08:59:39 -07:00
scripts Add a basic "fact" application 2012-07-27 13:34:21 -07:00
src Add aggregated facts to the Facts application 2012-07-27 13:46:01 -07:00
support/aphlict Add an Aphlict CLI client 2012-07-05 16:04:04 -07:00
webroot Add "device" JS/CSS for reactive stuff 2012-07-25 11:51:27 -07:00
.arcconfig Remove "remote_hooks_installed" from phabricator/.arcconfig 2012-07-24 07:19:15 -07:00
.divinerconfig Centralize rendering of application mail bodies 2012-07-16 19:01:43 -07:00
.gitignore Allow specifying custom celerity resource map 2012-06-04 18:45:03 -07:00
.gitmodules Just change the location. 2011-05-28 15:14:54 -07:00
README Add a roadmap document and update the README. 2011-06-29 09:38:03 -07:00

README 

Phabricator is a open source collection of web applications which make it easier
to write, review, and share source code. Phabricator was developed at Facebook.

This is an early release. It's pretty high-quality and usable, but under
active development so things may change quickly.

You can learn more about the project and find links to documentation and
resources at: http://phabricator.org/

LICENSE

Phabricator is released under the Apache 2.0 license except as otherwise noted.
http://www.apache.org/licenses/LICENSE-2.0