Transaction

Propagation:

  1. Mandatory
  2. Required
  3. Requires_New
  4. Never
  5. Not_Supported
  6. Nested
  7. Supports

 

Isolation:

  • READ UNCOMMITTED
  • READ COMMITTED
  • SERIALIZABLE
  1. 更新丢失(ost update)
  2. 脏读(dirty read)
  3. 非 重复读(nonrepeatabe read)
  4. 幻 像(phantom read)

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