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org.apache.spark.sql.delta

SnapshotIsolation

object SnapshotIsolation extends IsolationLevel with Product with Serializable

This isolation level will ensure that all reads will see a consistent snapshot of the table and any transactional write will successfully commit only if the values updated by the transaction have not been changed externally since the snapshot was read by the transaction.

This provides a lower consistency guarantee than WriteSerializable but a higher availability than that. For example, unlike WriteSerializable, this level allows two concurrent UPDATE operations reading the same data to be committed successfully as long as they don't modify the same data.

Note that for operations that do not modify data in the table, Snapshot isolation is same as Serializablity. Hence such operations can be safely committed with Snapshot isolation level.

Linear Supertypes
Serializable, Serializable, Product, Equals, IsolationLevel, AnyRef, Any
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  1. SnapshotIsolation
  2. Serializable
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  4. Product
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  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  10. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  11. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  12. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  13. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  14. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  15. def toString(): String
    Definition Classes
    IsolationLevel → AnyRef → Any
  16. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  17. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  18. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from IsolationLevel

Inherited from AnyRef

Inherited from Any

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