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Code Issues Releases Wiki Activity

When building audit queries, prefilter possible "authorPHID" values

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Summary:
Ref T13244. See PHI1057. Currently, if you're a member of a lot of projects/packages, you can end up with a very large `commit.authorPHID IN (...)` clause in part of the "Active Audits" query, since your `alice` token in "Responsible Users: alice" expands into every package and project you can audit on behalf of.

It's impossible for a commit to be authored by anything but a user, and evidence in PHI1057 suggests this giant `IN (...)` list can prevent MySQL from making effective utilization of the `<authorPHID, auditStatus, ...>` key on the table.

Prefilter the list of PHIDs to only PHIDs which can possibly author a commit.

(We'll also eventually need to convert the `authorPHIDs` into `identityPHIDs` anyway, for T12164, and this moves us slightly toward that.)

Test Plan: Loaded "Active Audits" before and after change, saw a more streamlined and sensible `authorPHID IN (...)` clause afterwards.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13244

Differential Revision: https://secure.phabricator.com/D20129
This commit is contained in:
epriestley 2019-02-07 11:44:48 -08:00
parent a4bab60ad0
commit 509fbb6c20
1 changed files with 44 additions and 7 deletions
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51
src/applications/diffusion/query/DiffusionCommitQuery.php
View file

@ -202,6 +202,7 @@ final class DiffusionCommitQuery
$table = $this->newResultObject();
$conn = $table->establishConnection('r');
$empty_exception = null;
$subqueries = array();
if ($this->responsiblePHIDs) {
$base_authors = $this->authorPHIDs;
@ -222,21 +223,33 @@ final class DiffusionCommitQuery
$this->authorPHIDs = $all_authors;
$this->auditorPHIDs = $base_auditors;
$subqueries[] = $this->buildStandardPageQuery(
$conn,
$table->getTableName());
try {
$subqueries[] = $this->buildStandardPageQuery(
$conn,
$table->getTableName());
} catch (PhabricatorEmptyQueryException $ex) {
$empty_exception = $ex;
}
$this->authorPHIDs = $base_authors;
$this->auditorPHIDs = $all_auditors;
$subqueries[] = $this->buildStandardPageQuery(
$conn,
$table->getTableName());
try {
$subqueries[] = $this->buildStandardPageQuery(
$conn,
$table->getTableName());
} catch (PhabricatorEmptyQueryException $ex) {
$empty_exception = $ex;
}
} else {
$subqueries[] = $this->buildStandardPageQuery(
$conn,
$table->getTableName());
}
if (!$subqueries) {
throw $empty_exception;
}
if (count($subqueries) > 1) {
$unions = null;
foreach ($subqueries as $subquery) {
@ -642,10 +655,19 @@ final class DiffusionCommitQuery
}
if ($this->authorPHIDs !== null) {
$author_phids = $this->authorPHIDs;
if ($author_phids) {
$author_phids = $this->selectPossibleAuthors($author_phids);
if (!$author_phids) {
throw new PhabricatorEmptyQueryException(
pht('Author PHIDs contain no possible authors.'));
}
}
$where[] = qsprintf(
$conn,
'commit.authorPHID IN (%Ls)',
$this->authorPHIDs);
$author_phids);
}
if ($this->epochMin !== null) {
@ -934,5 +956,20 @@ final class DiffusionCommitQuery
) + $parent;
}
private function selectPossibleAuthors(array $phids) {
// See PHI1057. Select PHIDs which might possibly be commit authors from
// a larger list of PHIDs. This primarily filters out packages and projects
// from "Responsible Users: ..." queries. Our goal in performing this
// filtering is to improve the performance of the final query.
foreach ($phids as $key => $phid) {
if (phid_get_type($phid) !== PhabricatorPeopleUserPHIDType::TYPECONST) {
unset($phids[$key]);
}
}
return $phids;
}
}