statistics: remove unnecessary copy in the baseCollector (#51244)

close #51246
pingcap · Feb 22, 2024 · 8f2428e · 8f2428e
1 parent f4013a3
commit 8f2428e
Showing 1 changed file with 1 addition and 3 deletions.
diff --git a/pkg/statistics/row_sampler.go b/pkg/statistics/row_sampler.go
@@ -317,9 +317,7 @@ func (s *baseCollector) FromProto(pbCollector *tipb.RowSampleCollector, memTrack
 		rowLen := len(pbSample.Row)
 		data := make([]types.Datum, 0, rowLen)
 		for _, col := range pbSample.Row {
-			b := make([]byte, len(col))
-			copy(b, col)
-			data = append(data, types.NewBytesDatum(b))
+			data = append(data, types.NewBytesDatum(col))
 		}
 		// Directly copy the weight.
 		sampleItem := &ReservoirRowSampleItem{Columns: data, Weight: pbSample.Weight}