If you have a read-heavy workload, you might want to set isolation to uncommitted read (UR) at the connection level so that you don't have to specify it in each statement.
如果有一个包含大量读取操作的工作负载，那么您可能想将隔离级别设置为未提交读取(UR)，从而不需要在每个语句中设置隔离级别。
Supports table and row level locking and 4 isolation levels, RR (repeatable read), rs (read stability), CS (default - cursor stability) and ur (uncommitted read).
支持表级和行级锁以及4个隔离级别：RR(可重复读)、RS(读可靠)、CS(默认——游标可靠)和UR(未提交读)。
Supports table and row level locking and 4 isolation levels, RR (repeatable read), rs (read stability), CS (default - cursor stability) and ur (uncommitted read).
支持表级和行级锁以及4个隔离级别：RR(可重复读)、RS(读可靠)、CS(默认——游标可靠)和UR(未提交读)。
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