io.prestosql.operator.scalar

Class ScalarFunctionImplementation

java.lang.Object

io.prestosql.operator.scalar.ScalarFunctionImplementation

public final class ScalarFunctionImplementation
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ScalarFunctionImplementation.ArgumentProperty
static class	ScalarFunctionImplementation.ArgumentType
static class	ScalarFunctionImplementation.NullConvention
static class	ScalarFunctionImplementation.ScalarImplementationChoice

Constructor Summary

Constructors

Constructor and Description
ScalarFunctionImplementation(boolean nullable, List<ScalarFunctionImplementation.ArgumentProperty> argumentProperties, MethodHandle methodHandle, boolean deterministic)
ScalarFunctionImplementation(boolean nullable, List<ScalarFunctionImplementation.ArgumentProperty> argumentProperties, MethodHandle methodHandle, Optional<MethodHandle> instanceFactory, boolean deterministic)
ScalarFunctionImplementation(List<ScalarFunctionImplementation.ScalarImplementationChoice> choices, boolean deterministic) Creates a ScalarFunctionImplementation consisting of one or more choices.

Method Summary

Modifier and Type	Method and Description
List<ScalarFunctionImplementation.ScalarImplementationChoice>	getAllChoices()
ScalarFunctionImplementation.ArgumentProperty	getArgumentProperty(int argumentIndex)
Optional<MethodHandle>	getInstanceFactory()
MethodHandle	getMethodHandle()
boolean	isDeterministic()
boolean	isNullable()

Methods inherited from class java.lang.Object

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

Constructor Detail

ScalarFunctionImplementation

public ScalarFunctionImplementation(boolean nullable,
                                    List<ScalarFunctionImplementation.ArgumentProperty> argumentProperties,
                                    MethodHandle methodHandle,
                                    boolean deterministic)

ScalarFunctionImplementation

public ScalarFunctionImplementation(boolean nullable,
                                    List<ScalarFunctionImplementation.ArgumentProperty> argumentProperties,
                                    MethodHandle methodHandle,
                                    Optional<MethodHandle> instanceFactory,
                                    boolean deterministic)

ScalarFunctionImplementation

public ScalarFunctionImplementation(List<ScalarFunctionImplementation.ScalarImplementationChoice> choices,
                                    boolean deterministic)

Creates a ScalarFunctionImplementation consisting of one or more choices.

All choices must have the same SQL signature, and are equivalent in what they do. The first choice is the default choice, which is the one used for legacy access methods. The default choice must be usable under any context. (e.g. it must not use BLOCK_POSITION convention.)

Parameters:

choices - the list of choices, ordered from generic to specific

Method Detail

isNullable

public boolean isNullable()

getArgumentProperty

public ScalarFunctionImplementation.ArgumentProperty getArgumentProperty(int argumentIndex)

getMethodHandle

public MethodHandle getMethodHandle()

getInstanceFactory

public Optional<MethodHandle> getInstanceFactory()

getAllChoices

public List<ScalarFunctionImplementation.ScalarImplementationChoice> getAllChoices()

isDeterministic

public boolean isDeterministic()