HepProgram (Apache Calcite API)

java.lang.Object
- org.apache.calcite.plan.hep.HepProgram

```
public class HepProgram
extends java.lang.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	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 Description

HepProgram(java.util.List<HepInstruction> instructions)
Creates a new empty HepProgram.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	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(java.util.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)
```