types: fix time_format is not compatible with MySQL (#9841) (#10474)

Author: qw4990

expression/integration_test.go

@@ -1476,6 +1476,12 @@ func (s *testIntegrationSuite) TestTimeBuiltin(c *C) {
 	result.Check(testkit.Rows("<nil>"))
 	result = tk.MustQuery("SELECT TIME_FORMAT(123, '%H:%i:%s %p');")
 	result.Check(testkit.Rows("00:01:23 AM"))
+	result = tk.MustQuery("SELECT TIME_FORMAT('24:00:00', '%r');")
+	result.Check(testkit.Rows("12:00:00 AM"))
+	result = tk.MustQuery("SELECT TIME_FORMAT('25:00:00', '%r');")
+	result.Check(testkit.Rows("01:00:00 AM"))
+	result = tk.MustQuery("SELECT TIME_FORMAT('24:00:00', '%l %p');")
+	result.Check(testkit.Rows("12 AM"))
 
 	// for date_format
 	result = tk.MustQuery(`SELECT DATE_FORMAT('2017-06-15', '%W %M %e %Y %r %y');`)

types/time.go

@@ -1866,14 +1866,14 @@ func (t Time) convertDateFormat(b rune, buf *bytes.Buffer) error {
 		fmt.Fprintf(buf, "%d", t.Time.Hour())
 	case 'h', 'I':
 		t := t.Time.Hour()
-		if t == 0 || t == 12 {
+		if t%12 == 0 {
 			fmt.Fprintf(buf, "%02d", 12)
 		} else {
 			fmt.Fprintf(buf, "%02d", t%12)
 		}
 	case 'l':
 		t := t.Time.Hour()
-		if t == 0 || t == 12 {
+		if t%12 == 0 {
 			fmt.Fprintf(buf, "%d", 12)
 		} else {
 			fmt.Fprintf(buf, "%d", t%12)
@@ -1889,6 +1889,7 @@ func (t Time) convertDateFormat(b rune, buf *bytes.Buffer) error {
 		}
 	case 'r':
 		h := t.Time.Hour()
+		h %= 24
 		switch {
 		case h == 0:
 			fmt.Fprintf(buf, "%02d:%02d:%02d AM", 12, t.Time.Minute(), t.Time.Second())