| commit | 776f4c43d99cb28cb62fbd2f75706625a9298ff9 | [log] [tgz] |
|---|---|---|
| author | Dave Borowitz <dborowitz@google.com> | Fri Jan 05 16:22:36 2018 -0500 |
| committer | Dave Borowitz <dborowitz@google.com> | Mon Jan 08 09:23:53 2018 -0500 |
| tree | 8255913adabcc2441a654dad9ec2b9df0e6b1072 | |
| parent | a66a680804a7c80d8034fa50fb4a6669403d963c [diff] |
Fix related changes for excessive numbers of patch sets The first step in GetRelated is to look for all changes with a group matching any of the groups mentioned in any of the patch sets of the input change. The total number of groups is unbounded, and in the common case of a 1-change series, each patch set will get its own group. This means that the number of terms in the query grows, unbounded, with the number of patch sets, potentially exceeding the backend-supported term limit. Work around this in the simplest way possible, by issuing multiple queries and merging the results. This is a little ugly for now because of the way that InternalQuery uses a single QueryProcessor instance, but there are only two callers, so it's not that bad. It is now possible for a single GetRelated call to fan out to multiple search queries, but as this only affects changes with hundreds or thousands of patch sets, and the fanout is only by a small factor, it should have negligible performance impact. Change-Id: I71b1172c0b91078d320ce56e15e1eaf218687a65
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