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Unlock Cluster.En

docs/document/content/user-manual/shardingsphere-proxy/distsql/syntax/ral/unlock-cluster.en.md

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+++ title = "UNLOCK CLUSTER" weight = 17 +++

Description

The UNLOCK CLUSTER syntax is used to release the lock applied to the CLUSTER by the LOCK CLUSTER WITH statement.

Syntax

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sql
UnlockCluster ::=
  'UNLOCK' 'CLUSTER' ('TIMEOUT' timeoutMillis)?

timeoutmillis ::=
  long

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Supplement

  • When the CLUSTER is not in a locked state, it is impossible to release the lock; otherwise, an exception will be thrown.
  • timeoutMillis is used to indicate the timeout duration for attempting to unlock, with the unit being milliseconds. When not specified, the default value is 3,000 milliseconds.

Example

  • Unlock the CLUSTER without setting a timeout.
sql
UNLOCK CLUSTER;
  • Unlock the CLUSTER and set the timeout to 2000 milliseconds.
sql
UNLOCK CLUSTER TIMEOUT 2000;

Reserved words

UNLOCK,CLUSTER