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SERVER-103029: explodeForSort: Consider partial explosions #1612

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SERVER-103029: explodeForSort: Consider partial explosions #1612

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5 changes: 5 additions & 0 deletions src/mongo/db/query/planner_analysis.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1036,6 +1036,11 @@ bool QueryPlannerAnalysis::explodeForSort(const CanonicalQuery& query,
if (!isOilExplodable(oil, iet)) {
break;
}
// We need not explode the fields in the desired sort order
auto elem = *kpIt;
if (elem.fieldNameStringData() == desiredSort.begin()->fieldNameStringData()) {
break;
}
numScans *= oil.intervals.size();
kpIt.next();
++boundsIdx;
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