Concurrency control Supports table and row level locking.

并发控制支持表级和行级锁。

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Supports table and row level locking.

支持表级和行级锁。

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Lock the entire table before saving (pessimistic locking).

保存(悲观锁)之前锁定整个表。

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Lock the entire table before saving (pessimistic locking).

保存(悲观锁)之前锁定整个表。

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