statistics: fix the wrong comments (#48183)

Rustin170506 · web-flow · commit 046b52a065df · 2023-11-01T10:09:37.000Z
diff --git a/pkg/statistics/handle/storage/stats_read_writer.go b/pkg/statistics/handle/storage/stats_read_writer.go
@@ -161,7 +161,8 @@ func (s *statsReadWriter) ChangeGlobalStatsID(from, to int64) (err error) {
 	}, util.FlagWrapTxn)
 }
 
-// ResetTableStats2KVForDrop resets the count to 0.
+// ResetTableStats2KVForDrop update the version of mysql.stats_meta.
+// Then GC worker will delete the old version of stats.
 func (s *statsReadWriter) ResetTableStats2KVForDrop(physicalID int64) (err error) {
 	statsVer := uint64(0)
 	defer func() {
diff --git a/pkg/statistics/handle/util/interfaces.go b/pkg/statistics/handle/util/interfaces.go
@@ -252,7 +252,8 @@ type StatsReadWriter interface {
 	// then tidb-server will reload automatic.
 	UpdateStatsVersion() error
 
-	// ResetTableStats2KVForDrop resets the count to 0.
+	// ResetTableStats2KVForDrop update the version of mysql.stats_meta.
+	// Then GC worker will delete the old version of stats.
 	ResetTableStats2KVForDrop(physicalID int64) (err error)
 
 	// ChangeGlobalStatsID changes the global stats ID.

Original file line number	Diff line number	Diff line change
`@@ -161,7 +161,8 @@ func (s *statsReadWriter) ChangeGlobalStatsID(from, to int64) (err error) {`
`161`	`161`	`}, util.FlagWrapTxn)`
`162`	`162`	`}`
`163`	`163`
`164`		`-// ResetTableStats2KVForDrop resets the count to 0.`
	`164`	`+// ResetTableStats2KVForDrop update the version of mysql.stats_meta.`
	`165`	`+// Then GC worker will delete the old version of stats.`
`165`	`166`	`func (s *statsReadWriter) ResetTableStats2KVForDrop(physicalID int64) (err error) {`
`166`	`167`	`statsVer := uint64(0)`
`167`	`168`	`defer func() {`