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epriestley 96fe8c0b83 Implement basic ngram search for Owners Package names 
Summary:
Ref T9979. This uses ngrams (specifically, trigrams) to build a reasonably efficient index for substring matching. Specifically, for a package like "Example", with ID 123, we store rows like this:

```
< ex, 123>
<exa, 123>
<xam, 123>
<amp, 123>
<mpl, 123>
<ple, 123>
<le , 123>
```

When the user searches for `exam`, we join this table for packages with tokens `exa` and `xam`. MySQL can do this a lot more efficiently than it can process a `LIKE "%exam%"` query against a huge table.

When the user searches for a one-letter or two-letter string, we only search the beginnings of words. This is probably what they want, the only thing we can do quickly, and a reasonable/expected behavior for typeaheads.

Test Plan:
  - Ran storage upgrades and search indexer.
  - Searched for stuff with "name contains".
  - Used typehaead and got sensible results.
  - Searched for `aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz` and saw only 16 joins.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9979

Differential Revision: https://secure.phabricator.com/D14846
2015-12-22 08:00:33 -08:00
bin Provide bin/garbage for interacting with garbage collection 2015-10-02 09:17:24 -07:00
conf Mark some strings for translation 2015-06-09 23:06:52 +10:00
externals Remove skins from Phame 2015-12-11 08:14:12 -08:00
resources Implement basic ngram search for Owners Package names 2015-12-22 08:00:33 -08:00
scripts Add a lock to storage upgrade and adjustment 2015-12-02 06:18:28 +11:00
src Implement basic ngram search for Owners Package names 2015-12-22 08:00:33 -08:00
support Add a "Startup" to DarkConsole 2015-08-21 14:53:29 -07:00
webroot Add more NUX states 2015-12-21 11:15:54 -08:00
.arcconfig Use the configuration driven unit test engine 2015-08-11 07:57:11 +10:00
.arclint Apply phutil XHPAST linter standard 2015-11-13 07:09:12 +11:00
.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 Add custom Cows and Figlet directories to .gitignore 2015-10-08 20:23:05 -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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