org.apache.calcite.interpreter (Apache Calcite API)

Provides an implementation of relational expressions using an interpreter.

The implementation is not efficient compared to generated code, but preparation time is less, and so the total prepare + execute time is competitive for queries over small data sets.

Interface Summary
Interface	Description
AggregateNode.Accumulator	Defines function implementation for things like `count()` and `sum()`.
AggregateNode.AccumulatorFactory	Creates an `AggregateNode.Accumulator`.
BindableRel	Relational expression that can implement itself in Bindable convention.
Compiler	Context while converting a tree of `RelNode` to a program that can be run by an `Interpreter`.
InterpretableRel	Relational expression that can implement itself using an interpreter.
Interpreter.ScalarCompiler	Converts a list of expressions to a scalar that can compute their values.
Node	Relational expression that can be executed using an interpreter.
Scalar	Compiled scalar expression.
Sink	Sink to which to send rows.
Source	Source of rows.

Class Summary
Class	Description
AbstractSingleNode<T extends SingleRel>	An interpreter that takes expects one incoming source relational expression.
AggregateNode	Interpreter node that implements an `Aggregate`.
AggregateNode.AccumulatorList	A list of accumulators used during grouping.
AggregateNode.CountAccumulator	Accumulator for calls to the COUNT function.
AggregateNode.DoubleSum	Implementation of `SUM` over DOUBLE values as a user-defined aggregate.
AggregateNode.FilterAccumulator	Accumulator that applies a filter to another accumulator.
AggregateNode.IntSum	Implementation of `SUM` over INTEGER values as a user-defined aggregate.
AggregateNode.LongSum	Implementation of `SUM` over BIGINT values as a user-defined aggregate.
AggregateNode.MaxDouble	Implementation of `MAX` function to calculate the minimum of `double` and `real` values as a user-defined aggregate.
AggregateNode.MaxFloat	Implementation of `MAX` function to calculate the minimum of `float` values as a user-defined aggregate.
AggregateNode.MaxInt	Implementation of `MAX` function to calculate the minimum of `integer` values as a user-defined aggregate.
AggregateNode.MaxLong	Implementation of `MAX` function to calculate the minimum of `long` values as a user-defined aggregate.
AggregateNode.MinDouble	Implementation of `MIN` function to calculate the minimum of `double` and `real` values as a user-defined aggregate.
AggregateNode.MinFloat	Implementation of `MIN` function to calculate the minimum of `float` values as a user-defined aggregate.
AggregateNode.MinInt	Implementation of `MIN` function to calculate the minimum of `integer` values as a user-defined aggregate.
AggregateNode.MinLong	Implementation of `MIN` function to calculate the minimum of `long` values as a user-defined aggregate.
AggregateNode.NumericComparison<T>	Common implementation of comparison aggregate methods over numeric values as a user-defined aggregate.
AggregateNode.ScalarAccumulator	Accumulator powered by `Scalar` code fragments.
AggregateNode.ScalarAccumulatorDef	Accumulator powered by `Scalar` code fragments.
AggregateNode.UdaAccumulator	Accumulator based upon a user-defined aggregate.
AggregateNode.UdaAccumulatorFactory	Accumulator factory based on a user-defined aggregate function.
Bindables	Utilities pertaining to `BindableRel` and `BindableConvention`.
Bindables.BindableAggregate	Implementation of `Aggregate` in bindable calling convention.
Bindables.BindableAggregateRule	Rule that converts an `Aggregate` to bindable convention.
Bindables.BindableFilter	Implementation of `Filter` in bindable convention.
Bindables.BindableFilterRule	Rule that converts a `Filter` to bindable convention.
Bindables.BindableJoin	Implementation of `Join` in bindable calling convention.
Bindables.BindableJoinRule	Rule to convert a `LogicalJoin` to a `Bindables.BindableJoin`.
Bindables.BindableProject	Implementation of `Project` in bindable calling convention.
Bindables.BindableProjectRule	Rule to convert a `LogicalProject` to a `Bindables.BindableProject`.
Bindables.BindableSort	Implementation of `Sort` bindable calling convention.
Bindables.BindableSortRule	Rule to convert an `Sort` to a `Bindables.BindableSort`.
Bindables.BindableTableScan	Scan of a table that implements `ScannableTable` and therefore can be converted into an `Enumerable`.
Bindables.BindableTableScanRule	Rule that converts a `TableScan` to bindable convention.
Bindables.BindableUnion	Implementation of `Union` in bindable calling convention.
Bindables.BindableUnionRule	Rule to convert an `LogicalUnion` to a `Bindables.BindableUnion`.
Bindables.BindableValues	Implementation of `Values` in bindable calling convention.
Bindables.BindableValuesRule	Rule that converts a `Values` to bindable convention.
Bindables.BindableWindow	Implementation of `Window` in bindable convention.
Bindables.BindableWindowRule	Rule to convert a `LogicalWindow` to a `Bindables.BindableWindow`.
Context	Context for executing a scalar expression in an interpreter.
FilterNode	Interpreter node that implements a `Filter`.
InterpretableConverter	Relational expression that converts any relational expression input to `InterpretableConvention`, by wrapping it in an interpreter.
InterpretableRel.InterpreterImplementor	Context when a `RelNode` is being converted to an interpreter `Node`.
Interpreter	Interpreter.
Interpreter.CompilerImpl	Walks over a tree of `RelNode` and, for each, creates a `Node` that can be executed in the interpreter.
Interpreter.DuplicatingSink	Implementation of `Sink` using a `ArrayDeque`.
Interpreter.Edge	Edge between a `RelNode` and one of its inputs.
Interpreter.EnumeratorSource	A `Source` that is just backed by an `Enumerator`.
Interpreter.ListSink	Implementation of `Sink` using a `ArrayDeque`.
Interpreter.ListSource	Implementation of `Source` using a `ArrayDeque`.
Interpreter.NodeInfo	Information about a node registered in the data flow graph.
Interpreters	Utilities relating to `Interpreter` and `InterpretableConvention`.
JaninoRexCompiler	Compiles a scalar expression (`RexNode`) to an expression that can be evaluated (`Scalar`) by generating a Java AST and compiling it to a class using Janino.
JoinNode	Interpreter node that implements a `Join`.
Nodes	Helper methods for `Node` and implementations for core relational expressions.
Nodes.CoreCompiler	Extension to `Interpreter.CompilerImpl` that knows how to handle the core logical `RelNode`s.
NoneToBindableConverterRule	Rule to convert a relational expression from `Convention.NONE` to `BindableConvention`.
ProjectNode	Interpreter node that implements a `Project`.
Row	Row.
Row.RowBuilder	Utility class to build row objects.
SortNode	Interpreter node that implements a `Sort`.
TableScanNode	Interpreter node that implements a `TableScan`.
UnionNode	Interpreter node that implements a `Union`.
ValuesNode	Interpreter node that implements a `Values`.
WindowNode	Interpreter node that implements a `Window`.

Enum Summary
Enum	Description
BindableConvention	Calling convention that returns results as an `Enumerable` of object arrays.
InterpretableConvention	Calling convention that returns results as an `Enumerable` of object arrays.

Package org.apache.calcite.interpreter