Package org.apache.druid.segment.join

Interface Summary

Interface	Description
Joinable	Represents something that can be the right-hand side of a join.
JoinableFactory	Utility for creating Joinable objects.
JoinMatcher	An interface returned by Joinable.makeJoinMatcher(org.apache.druid.segment.ColumnSelectorFactory, org.apache.druid.segment.join.JoinConditionAnalysis, boolean) and used by HashJoinEngine to implement a join.

Class Summary

Class	Description
Equality	Represents a join condition between a left-hand-side expression (leftExpr) and a right-hand-side direct column access (rightColumn).
HashJoinEngine
HashJoinSegment	Represents a deep, left-heavy join of a left-hand side baseSegment onto a series of right-hand side clauses.
HashJoinSegmentStorageAdapter
JoinableClause	Represents everything about a join clause except for the left-hand datasource.
Joinables	Utility methods for working with Joinable related classes.
JoinConditionAnalysis	Represents analysis of a join condition.
MapJoinableFactory	A JoinableFactory that delegates to the appropriate factory based on the type of the datasource.
PossiblyNullColumnValueSelector<T>	A ColumnValueSelector that wraps a base selector but might also generate null values on demand.
PossiblyNullDimensionSelector
PostJoinCursor	A Cursor decorator used by HashJoinSegmentStorageAdapter.makeCursors(org.apache.druid.query.filter.Filter, org.joda.time.Interval, org.apache.druid.segment.VirtualColumns, org.apache.druid.java.util.common.granularity.Granularity, boolean, org.apache.druid.query.QueryMetrics<?>) to add post-join virtual columns and filters.

Enum Summary

Enum	Description
JoinType