Package org.apache.calcite.adapter.druid

Query provider based on a Druid database.

See: Description

Interface Summary

Interface	Description
DruidConnection	Connection to Druid.
DruidConnectionImpl.RunnableQueueSink	A Sink that is also Runnable.
DruidQuery.Json	Object that knows how to write itself to a JsonGenerator.

Class Summary

Class	Description
DruidConnectionImpl	Implementation of DruidConnection.
DruidConnectionImpl.BlockingQueueEnumerator<E>	An Enumerator that gets its rows from a BlockingQueue.
DruidConnectionImpl.JsonAggregator	Element of the "aggregators" collection in the result of a "segmentMetadata" call, populated by Jackson.
DruidConnectionImpl.JsonColumn	Element of the "columns" collection in the result of a "segmentMetadata" call, populated by Jackson.
DruidConnectionImpl.JsonSegmentMetadata	Result of a "segmentMetadata" call, populated by Jackson.
DruidConnectionImpl.Page	Progress through a large fetch.
DruidDateTimeUtils	Utilities for generating intervals from RexNode.
DruidQuery	Relational expression representing a scan of a Druid data set.
DruidQuery.DruidQueryNode	Interpreter node that executes a Druid query and sends the results to a Sink.
DruidQuery.JsonAggregation	Aggregation element of a Druid "groupBy" or "topN" query.
DruidQuery.JsonBound	Bound filter.
DruidQuery.JsonCardinalityAggregation	Aggregation element that calls the "cardinality" function.
DruidQuery.JsonCollation	Collation element of a Druid "groupBy" query.
DruidQuery.JsonCompositeFilter	Filter that combines other filters using a boolean operator.
DruidQuery.JsonFilter	Filter element of a Druid "groupBy" or "topN" query.
DruidQuery.JsonLimit	Collation element of a Druid "groupBy" query.
DruidQuery.JsonSelector	Equality filter.
DruidQuery.QuerySpec	Druid query specification.
DruidQuery.Translator	Translates scalar expressions to Druid field references.
DruidResultEnumerator	Created by jhyde on 3/9/16.
DruidRules	Rules and relational operators for DruidQuery.
DruidRules.DruidAggregateRule	Rule to push an Aggregate into a DruidQuery.
DruidRules.DruidFilterRule	Rule to push a Filter into a DruidQuery.
DruidRules.DruidProjectAggregateRule	Rule to push an Aggregate and Project into a DruidQuery.
DruidRules.DruidProjectRule	Rule to push a Project into a DruidQuery.
DruidRules.DruidProjectSortRule	Rule to push an Sort through a Project.
DruidRules.DruidSortProjectRule	Rule to push back Project through a Sort.
DruidRules.DruidSortRule	Rule to push an Aggregate into a DruidQuery.
DruidSchema	Schema mapped onto a Druid instance.
DruidSchemaFactory	Schema factory that creates Druid schemas.
DruidTable	Table mapped onto a Druid table.
DruidTable.MapRelProtoDataType	Creates a RelDataType from a map of field names and types.
DruidTableFactory	Implementation of TableFactory for Druid.

Enum Summary

Enum	Description
QueryType	Type of Druid query.

Package org.apache.calcite.adapter.druid Description

Query provider based on a Druid database.