org.apache.spark.sql.execution.datasources
Used to lookup original attribute capitalization
Returns a new instance of this LogicalRelation.
Returns a new instance of this LogicalRelation. According to the semantics of
MultiInstanceRelation, this method returns a copy of this object with
unique expression ids. We respect the expectedOutputAttributes
and create
new instances of attributes in it.
Used to link a BaseRelation in to a logical query plan.