org.apache.calcite.adapter.enumerable

Class EnumerableRelImplementor

java.lang.Object

org.apache.calcite.adapter.enumerable.JavaRelImplementor

org.apache.calcite.adapter.enumerable.EnumerableRelImplementor

All Implemented Interfaces:

RelImplementor

public class EnumerableRelImplementor
extends JavaRelImplementor

Subclass of RelImplementor for relational operators of EnumerableConvention calling convention.

Field Summary

Fields

Modifier and Type	Field and Description
protected Function1<String,RexToLixTranslator.InputGetter>	allCorrelateVariables
Map<String,Object>	map

Constructor Summary

Constructors

Constructor and Description
EnumerableRelImplementor(RexBuilder rexBuilder, Map<String,Object> internalParameters)

Method Summary

Modifier and Type	Method and Description
void	clearCorrelVariable(String name)
RexToLixTranslator.InputGetter	getCorrelVariableGetter(String name)
ClassDeclaration	implementRoot(EnumerableRel rootRel, EnumerableRel.Prefer prefer)
void	registerCorrelVariable(String name, ParameterExpression pe, BlockBuilder corrBlock, PhysType physType)
EnumerableRel.Result	result(PhysType physType, BlockStatement block)
<T> Expression	stash(T input, Class<? super T> clazz) Stashes a value for the executor.
EnumerableRel.Result	visitChild(EnumerableRel parent, int ordinal, EnumerableRel child, EnumerableRel.Prefer prefer)

Methods inherited from class org.apache.calcite.adapter.enumerable.JavaRelImplementor

getRexBuilder, getRootExpression, getTypeFactory

Methods inherited from class java.lang.Object

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

Field Detail

map

public final Map<String,Object> map

allCorrelateVariables

protected final Function1<String,RexToLixTranslator.InputGetter> allCorrelateVariables

Constructor Detail

EnumerableRelImplementor

public EnumerableRelImplementor(RexBuilder rexBuilder,
                                Map<String,Object> internalParameters)

Method Detail

visitChild

public EnumerableRel.Result visitChild(EnumerableRel parent,
                                       int ordinal,
                                       EnumerableRel child,
                                       EnumerableRel.Prefer prefer)

implementRoot

public ClassDeclaration implementRoot(EnumerableRel rootRel,
                                      EnumerableRel.Prefer prefer)

stash

public <T> Expression stash(T input,
                            Class<? super T> clazz)

Stashes a value for the executor. Given values are de-duplicated if identical (see IdentityHashMap).

For instance, to pass ArrayList to your method, you can use Expressions.call(method, implementor.stash(arrayList)).

For simple literals (strings, numbers) the result is equivalent to Expressions.constant(Object, java.lang.reflect.Type).

Note: the input value is held in memory as long as the statement is alive. If you are using just a subset of its content, consider creating a slimmer holder.

Type Parameters:

T - Java class type of the value when it is used

Parameters:

input - Value to be stashed

clazz - Java class type of the value when it is used

Returns:

Expression that will represent input in runtime

registerCorrelVariable

public void registerCorrelVariable(String name,
                                   ParameterExpression pe,
                                   BlockBuilder corrBlock,
                                   PhysType physType)

clearCorrelVariable

public void clearCorrelVariable(String name)

getCorrelVariableGetter

public RexToLixTranslator.InputGetter getCorrelVariableGetter(String name)

result

public EnumerableRel.Result result(PhysType physType,
                                   BlockStatement block)