executor: fix time zone issue when querying slow log (#58455) (#58577)

close #58452

Author: ti-chi-bot

pkg/executor/slow_query.go

@@ -752,7 +752,7 @@ func (e *slowQueryRetriever) setColumnValue(sctx sessionctx.Context, row []types
 				sctx.GetSessionVars().StmtCtx.AppendWarning(err)
 				return false
 			}
-			timeValue := types.NewTime(types.FromGoTime(t), mysql.TypeTimestamp, types.MaxFsp)
+			timeValue := types.NewTime(types.FromGoTime(t.In(tz)), mysql.TypeTimestamp, types.MaxFsp)
 			return checker.isTimeValid(timeValue)
 		}
 		return true
@@ -926,9 +926,9 @@ func ParseTime(s string) (time.Time, error) {
 }
 
 type logFile struct {
-	file       *os.File  // The opened file handle
-	start      time.Time // The start time of the log file
-	compressed bool      // The file is compressed or not
+	file       *os.File   // The opened file handle
+	start      types.Time // The start time of the log file
+	compressed bool       // The file is compressed or not
 }
 
 // getAllFiles is used to get all slow-log needed to parse, it is exported for test.
@@ -984,7 +984,8 @@ func (e *slowQueryRetriever) getAllFiles(ctx context.Context, sctx sessionctx.Co
 		if err != nil {
 			return handleErr(err)
 		}
-		start := types.NewTime(types.FromGoTime(fileStartTime), mysql.TypeDatetime, types.MaxFsp)
+		tz := sctx.GetSessionVars().Location()
+		start := types.NewTime(types.FromGoTime(fileStartTime.In(tz)), mysql.TypeDatetime, types.MaxFsp)
 		if e.checker.enableTimeCheck {
 			notInAllTimeRanges := true
 			for _, tr := range e.checker.timeRanges {
@@ -1007,7 +1008,7 @@ func (e *slowQueryRetriever) getAllFiles(ctx context.Context, sctx sessionctx.Co
 				return handleErr(err)
 			}
 			if e.checker.enableTimeCheck {
-				end := types.NewTime(types.FromGoTime(fileEndTime), mysql.TypeDatetime, types.MaxFsp)
+				end := types.NewTime(types.FromGoTime(fileEndTime.In(tz)), mysql.TypeDatetime, types.MaxFsp)
 				inTimeRanges := false
 				for _, tr := range e.checker.timeRanges {
 					if !(start.Compare(tr.endTime) > 0 || end.Compare(tr.startTime) < 0) {
@@ -1026,7 +1027,7 @@ func (e *slowQueryRetriever) getAllFiles(ctx context.Context, sctx sessionctx.Co
 		}
 		logFiles = append(logFiles, logFile{
 			file:       file,
-			start:      fileStartTime,
+			start:      start,
 			compressed: compressed,
 		})
 		skip = true
@@ -1049,9 +1050,9 @@ func (e *slowQueryRetriever) getAllFiles(ctx context.Context, sctx sessionctx.Co
 			ret = append(ret, file)
 			continue
 		}
-		start := types.NewTime(types.FromGoTime(logFiles[i].start), mysql.TypeDatetime, types.MaxFsp)
+		start := logFiles[i].start
 		// use next file.start as endTime
-		end := types.NewTime(types.FromGoTime(logFiles[i+1].start), mysql.TypeDatetime, types.MaxFsp)
+		end := logFiles[i+1].start
 		inTimeRanges := false
 		for _, tr := range e.checker.timeRanges {
 			if !(start.Compare(tr.endTime) > 0 || end.Compare(tr.startTime) < 0) {

pkg/executor/slow_query_sql_test.go

@@ -304,6 +304,13 @@ SELECT original_sql, bind_sql, default_db, status, create_time, update_time, cha
 	tk.MustQuery("select count(plan_digest) from `information_schema`.`slow_query` where time > '2019-10-13 20:08:13' and time < now();").Check(testkit.Rows("3"))
 	tk.MustQuery("select count(plan_digest) from `information_schema`.`slow_query` where time > '2022-04-29 17:50:00'").Check(testkit.Rows("0"))
 	tk.MustQuery("select count(*) from `information_schema`.`slow_query` where time < '2010-01-02 15:04:05'").Check(testkit.Rows("0"))
+
+	// test the time zone change cases, see issue: https://github.com/pingcap/tidb/issues/58452
+	tk.MustExec("set @@time_zone='UTC'")
+	tk.MustQuery("select count(*) from `information_schema`.`slow_query` where time > '2020-10-13 12:08:13' and time < '2020-10-13 13:08:13'").Check(testkit.Rows("1"))
+	tk.MustQuery("select count(plan_digest) from `information_schema`.`slow_query` where time > '2020-10-13 12:08:13' and time < '2020-10-13 13:08:13'").Check(testkit.Rows("1"))
+	tk.MustExec("set @@time_zone='+10:00'")
+	tk.MustQuery("select count(*) from `information_schema`.`slow_query` where time > '2022-04-21 16:44:54' and time < '2022-04-21 16:44:55'").Check(testkit.Rows("1"))
 }
 
 func TestIssue37066(t *testing.T) {