Whilst changing the character set to utf8mb4 we should set ROW_FORMAT=dynamic too (#12804)

Fix #12801

Signed-off-by: Andrew Thornton <art27@cantab.net>

models/convert.go

@@ -10,7 +10,7 @@ import (
 	"code.gitea.io/gitea/modules/setting"
 )
 
-// ConvertUtf8ToUtf8mb4 converts database and tables from utf8 to utf8mb4 if it's mysql
+// ConvertUtf8ToUtf8mb4 converts database and tables from utf8 to utf8mb4 if it's mysql and set ROW_FORMAT=dynamic
 func ConvertUtf8ToUtf8mb4() error {
 	_, err := x.Exec(fmt.Sprintf("ALTER DATABASE `%s` CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci", setting.Database.Name))
 	if err != nil {
@@ -22,6 +22,10 @@ func ConvertUtf8ToUtf8mb4() error {
 		return err
 	}
 	for _, table := range tables {
+		if _, err := x.Exec(fmt.Sprintf("ALTER TABLE `%s` ROW_FORMAT=dynamic;", table.Name)); err != nil {
+			return err
+		}
+
 		if _, err := x.Exec(fmt.Sprintf("ALTER TABLE `%s` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;", table.Name)); err != nil {
 			return err
 		}