Mingyu Chen c7aa3f9717 [fix](backup) backup throw NPE when no partition in table (#17546) ...

If table has no partition, backup will report error:

2023-03-06 17:35:32,971 ERROR (backupHandler|24) [Daemon.run():118] daemon thread got exception. name: backupHandler
java.util.NoSuchElementException: No value present
        at java.util.Optional.get(Optional.java:135) ~[?:1.8.0_152]
        at org.apache.doris.catalog.OlapTable.selectiveCopy(OlapTable.java:1259) ~[doris-fe.jar:1.0-SNAPSHOT]
        at org.apache.doris.backup.BackupJob.prepareBackupMeta(BackupJob.java:505) ~[doris-fe.jar:1.0-SNAPSHOT]
        at org.apache.doris.backup.BackupJob.prepareAndSendSnapshotTask(BackupJob.java:398) ~[doris-fe.jar:1.0-SNAPSHOT]
        at org.apache.doris.backup.BackupJob.run(BackupJob.java:301) ~[doris-fe.jar:1.0-SNAPSHOT]
        at org.apache.doris.backup.BackupHandler.runAfterCatalogReady(BackupHandler.java:188) ~[doris-fe.jar:1.0-SNAPSHOT]
        at org.apache.doris.common.util.MasterDaemon.runOneCycle(MasterDaemon.java:58) ~[doris-fe.jar:1.0-SNAPSHOT]
        at org.apache.doris.common.util.Daemon.run(Daemon.java:116) ~[doris-fe.jar:1.0-SNAPSHOT]

2023-03-10 10:19:37 +08:00

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[fix](backup) backup throw NPE when no partition in table (#17546)

2023-03-10 10:19:37 +08:00

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[typo](docs)Remove doris manager doc (#16278)

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[fix](backup) backup throw NPE when no partition in table (#17546)

2023-03-10 10:19:37 +08:00

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