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CLEAR ORPHAN DATABASES
Removes orphaned partitions. Orphaned partitions are partition databases on leaf nodes that are no longer considered part of the cluster.
Syntax
CLEAR ORPHAN DATABASES;
Remarks
Alert
This command cannot be undone.
The master aggregator avoids dropping orphan partition databases as a safeguard, in case this data is needed.
To detect orphan partitions, run SHOW CLUSTER STATUS and check for partitions with the role of Orphan.
Before running CLEAR ORPHAN DATABASES, run: EXPLAIN CLEAR ORPHAN DATABASES; to see which partitions will be dropped.
