HashedRelationBroadcastMode¶

HashedRelationBroadcastMode is a BroadcastMode.

Creating Instance¶

HashedRelationBroadcastMode takes the following to be created:

• Key Expressions
• isNullAware flag (default: false)

HashedRelationBroadcastMode is created when:

• PlanAdaptiveDynamicPruningFilters physical optimization is executed (to optimize query plans with DynamicPruningExpression)
• PlanDynamicPruningFilters physical optimization is requested to broadcastMode
• BroadcastHashJoinExec physical operator is requested for requiredChildDistribution

Transforming InternalRows into HashedRelation¶

transform(
  rows: Iterator[InternalRow],
  sizeHint: Option[Long]): HashedRelation

transform creates a HashedRelation with or without sizeEstimate based on the given sizeHint.

transform is part of the BroadcastMode abstraction.