org.apache.calcite.adapter.druid (Apache Calcite API)

Query provider based on a Druid database.

Interface Summary
Interface	Description
DimensionSpec	Interface for Druid DimensionSpec.
DruidConnection	Connection to Druid.
DruidConnectionImpl.RunnableQueueSink	A `Sink` that is also `Runnable`.
DruidJson	Object that knows how to write itself to a `JsonGenerator`.
DruidSqlOperatorConverter	Defines how to convert RexNode with a given calcite SQL operator to Druid expressions
ExtractionFunction	Interface for Druid extraction functions.
Granularity	A strategy by which Druid rolls up rows into sub-totals based on their timestamp values.

Class Summary
Class	Description
BinaryOperatorConversion	Binary operator conversion utility class used to convert expression like exp1 Operator exp2
CeilOperatorConversion	DruidSqlOperatorConverter implementation that handles Ceil operations conversions
ComplexMetric	Used to store information about available complex metrics in the Druid Adapter
DefaultDimensionSpec	Default implementation of DimensionSpec.
DirectOperatorConversion	Direct operator conversion for expression like Function(exp_1,...exp_n)
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.
DruidExpressions	Expression utility class to transform Calcite expressions to Druid expressions when possible.
DruidJsonFilter	Filter element of a Druid "groupBy" or "topN" query.
DruidJsonFilter.JsonBound	Bound filter.
DruidJsonFilter.JsonCompositeFilter	Filter that combines other filters using a boolean operator.
DruidJsonFilter.JsonDimHavingFilter	Druid Having Filter spec
DruidJsonFilter.JsonExpressionFilter	Druid Expression filter.
DruidJsonFilter.JsonInFilter	IN filter.
DruidJsonFilter.JsonSelector	Equality filter.
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.JsonCardinalityAggregation	Aggregation element that calls the "cardinality" function.
DruidQuery.JsonCollation	Collation element of a Druid "groupBy" query.
DruidQuery.JsonExpressionPostAgg	Druid Json Expression post aggregate.
DruidQuery.JsonFilteredAggregation	Aggregation element that contains a filter
DruidQuery.JsonLimit	Collation element of a Druid "groupBy" query.
DruidQuery.JsonPostAggregation	Post-Aggregator Post aggregator abstract writer
DruidQuery.QuerySpec	Druid query specification.
DruidQuery.ScanQuery	Druid Scan Query Body
DruidRules	Rules and relational operators for `DruidQuery`.
DruidRules.DruidAggregateExtractProjectRule	Rule to extract a `Project` from `Aggregate` on top of `DruidQuery` based on the fields used in the aggregate.
DruidRules.DruidAggregateFilterTransposeRule	Rule to push an `Aggregate` past a `Filter` when `Filter` is on top of a `DruidQuery`.
DruidRules.DruidAggregateProjectRule	Rule to push an `Aggregate` and `Project` into a `DruidQuery`.
DruidRules.DruidAggregateRule	Rule to push an `Aggregate` into a `DruidQuery`.
DruidRules.DruidFilterAggregateTransposeRule	Rule to push an `Filter` past an `Aggregate` when `Aggregate` is on top of a `DruidQuery`.
DruidRules.DruidFilterProjectTransposeRule	Rule to push a `Filter` past a `Project` when `Project` is on top of a `DruidQuery`.
DruidRules.DruidFilterRule	Rule to push a `Filter` into a `DruidQuery`.
DruidRules.DruidHavingFilterRule	Rule to Push a Having `Filter` into a `DruidQuery`
DruidRules.DruidPostAggregationProjectRule	Rule to push a `Project` into a `DruidQuery` as a Post aggregator.
DruidRules.DruidProjectFilterTransposeRule	Rule to push a `Project` past a `Filter` when `Filter` is on top of a `DruidQuery`.
DruidRules.DruidProjectRule	Rule to push a `Project` into a `DruidQuery`.
DruidRules.DruidProjectSortTransposeRule	Rule to push back `Project` through a `Sort`.
DruidRules.DruidSortProjectTransposeRule	Rule to push an `Sort` through a `Project`.
DruidRules.DruidSortRule	Rule to push a `Sort` into a `DruidQuery`.
DruidSchema	Schema mapped onto a Druid instance.
DruidSchemaFactory	Schema factory that creates Druid schemas.
DruidSqlCastConverter	Druid cast converter operator used to translates calcite casts to Druid expression cast
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.
ExtractionDimensionSpec	Implementation of extraction function DimensionSpec.
ExtractOperatorConversion	Time extract operator conversion for expressions like EXTRACT(timeUnit FROM arg) Unit can be SECOND, MINUTE, HOUR, DAY (day of month), DOW (day of week), DOY (day of year), WEEK (week of week year), MONTH (1 through 12), QUARTER (1 through 4), or YEAR
FloorOperatorConversion	DruidSqlOperatorConverter implementation that handles Floor operations conversions
Granularities	Factory methods and helpers for `Granularity`.
Granularities.PeriodGranularity	Implementation of `Granularity` based on a time unit.
NaryOperatorConverter	Converts Calcite n-ary operators to druid expression eg (arg1 Op arg2 Op arg3)
SubstringOperatorConversion	Converts Calcite SUBSTRING call to Druid Expression when possible
TimeExtractionFunction	Implementation of Druid time format extraction function.
UnaryPrefixOperatorConversion	Unary prefix Operator conversion class used to convert expression like Unary NOT and Minus
UnarySuffixOperatorConversion	Unary suffix operator conversion, used to convert function like: expression Unary_Operator
VirtualColumn	Druid Json Expression based Virtual Column.
VirtualColumn.Builder	Virtual Column Builder

Enum Summary
Enum	Description
DruidJsonFilter.Type	Supported filter types
DruidType	Druid type.
Granularities.AllGranularity	Implementation of `Granularity` for `Granularity.Type.ALL`.
Granularity.Type	Type of supported periods for granularity.
QueryType	Type of Druid query.

Package org.apache.calcite.adapter.druid