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statistics: kill in time when to mergeGlobalTopN with partition (#45707) #45709

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Aug 1, 2023
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statistics: kill in time when to mergeGlobalTopN with partition (#45707) #45709

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3 changes: 3 additions & 0 deletions statistics/cmsketch.go
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Original file line number Diff line number Diff line change
Expand Up @@ -834,6 +834,9 @@ func MergePartTopN2GlobalTopN(loc *time.Location, version int, topNs []*TopN, n
// 1. Check the topN first.
// 2. If the topN doesn't contain the value corresponding to encodedVal. We should check the histogram.
for j := 0; j < partNum; j++ {
if atomic.LoadUint32(kiiled) == 1 {
return nil, nil, nil, errors.Trace(ErrQueryInterrupted)
}
if (j == i && version >= 2) || topNs[j].findTopN(val.Encoded) != -1 {
continue
}
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