org.apache.calcite.plan.hep

Class HepProgram

java.lang.Object

org.apache.calcite.plan.hep.HepProgram

public class HepProgram
extends Object

HepProgram specifies the order in which rules should be attempted by HepPlanner. Use HepProgramBuilder to create a new instance of HepProgram.

Note that the structure of a program is immutable, but the planner uses it as read/write during planning, so a program can only be in use by a single planner at a time.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) HepInstruction.EndGroup	group
(package private) com.google.common.collect.ImmutableList<HepInstruction>	instructions
static int	MATCH_UNTIL_FIXPOINT Symbolic constant for matching until no more matches occur.
(package private) int	matchLimit
(package private) HepMatchOrder	matchOrder

Constructor Summary

Constructors

Constructor and Description
HepProgram(List<HepInstruction> instructions) Creates a new empty HepProgram.

Method Summary

Modifier and Type	Method and Description
static HepProgramBuilder	builder()
(package private) void	initialize(boolean clearCache)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MATCH_UNTIL_FIXPOINT

public static final int MATCH_UNTIL_FIXPOINT

Symbolic constant for matching until no more matches occur.

See Also:

Constant Field Values

instructions

final com.google.common.collect.ImmutableList<HepInstruction> instructions

matchLimit

int matchLimit

matchOrder

HepMatchOrder matchOrder

group

HepInstruction.EndGroup group

Constructor Detail

HepProgram

HepProgram(List<HepInstruction> instructions)

Creates a new empty HepProgram. The program has an initial match order of HepMatchOrder.ARBITRARY, and an initial match limit of MATCH_UNTIL_FIXPOINT.

Method Detail

builder

public static HepProgramBuilder builder()

initialize

void initialize(boolean clearCache)