org.apache.calcite.interpreter

Interface Compiler

All Known Implementing Classes:

Nodes.CoreCompiler

public interface Compiler

Context while converting a tree of RelNode to a program that can be run by an Interpreter.

Method Summary

Modifier and Type	Method and Description
RelDataType	combinedRowType(List<RelNode> inputs)
Scalar	compile(List<RexNode> nodes, @Nullable RelDataType inputRowType) Compiles an expression to an executable form.
Context	createContext()
void	enumerable(RelNode rel, org.apache.calcite.linq4j.Enumerable<Row> rowEnumerable) Tells the interpreter that a given relational expression wishes to give its output as an enumerable.
DataContext	getDataContext()
Sink	sink(RelNode rel) Creates a Sink for a relational expression to write into.
Source	source(RelNode rel, int ordinal)

Method Detail

compile

Scalar compile(List<RexNode> nodes,
               @Nullable RelDataType inputRowType)

Compiles an expression to an executable form.

combinedRowType

RelDataType combinedRowType(List<RelNode> inputs)

source

Source source(RelNode rel,
              int ordinal)

sink

Sink sink(RelNode rel)

Creates a Sink for a relational expression to write into.

This method is generally called from the constructor of a Node. But a constructor could instead call enumerable(RelNode, Enumerable).

Parameters:

rel - Relational expression

Returns:

Sink

enumerable

void enumerable(RelNode rel,
                org.apache.calcite.linq4j.Enumerable<Row> rowEnumerable)

Tells the interpreter that a given relational expression wishes to give its output as an enumerable.

This is as opposed to the norm, where a relational expression calls sink(RelNode), then its Node.run() method writes into that sink.

Parameters:

rel - Relational expression

rowEnumerable - Contents of relational expression

getDataContext

DataContext getDataContext()

createContext

Context createContext()