Protobuf repeated defines an array element. The element may be an object or what about null?

protobuf repeated defines an array element. What if the element may be an object or null?

Dec.15,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e4638b-44b8c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e4638b-44b8c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?