case classExprId(id: Long, jvmId: UUID) extends Product with Serializable
A globally unique id for a given named expression.
Used to identify which attribute output by a relation is being
referenced in a subsequent computation.
The id field is unique within a given JVM, while the uuid is used to uniquely identify JVMs.
Linear Supertypes
Serializable, Serializable, Product, Equals, AnyRef, Any
A globally unique id for a given named expression. Used to identify which attribute output by a relation is being referenced in a subsequent computation.
The
id
field is unique within a given JVM, while theuuid
is used to uniquely identify JVMs.