com.facebook.presto.operator.scalar

Class ArrayReduceFunction

java.lang.Object

com.facebook.presto.metadata.BuiltInFunction

com.facebook.presto.metadata.SqlScalarFunction

com.facebook.presto.operator.scalar.ArrayReduceFunction

All Implemented Interfaces:

SqlFunction

public final class ArrayReduceFunction
extends SqlScalarFunction

Field Summary

Fields

Modifier and Type	Field and Description
static ArrayReduceFunction	ARRAY_REDUCE_FUNCTION

Method Summary

Modifier and Type	Method and Description
String	getDescription()
SqlFunctionVisibility	getVisibility()
boolean	isCalledOnNullInput()
boolean	isDeterministic()
static Object	reduce(Type inputType, Block block, Object initialIntermediateValue, BinaryFunctionInterface inputFunction, UnaryFunctionInterface outputFunction)
BuiltInScalarFunctionImplementation	specialize(BoundVariables boundVariables, int arity, FunctionAndTypeManager functionAndTypeManager)

Methods inherited from class com.facebook.presto.metadata.SqlScalarFunction

builder, builder, getSignature

Methods inherited from class java.lang.Object

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

Field Detail

ARRAY_REDUCE_FUNCTION

public static final ArrayReduceFunction ARRAY_REDUCE_FUNCTION

Method Detail

getVisibility

public SqlFunctionVisibility getVisibility()

isDeterministic

public boolean isDeterministic()

isCalledOnNullInput

public boolean isCalledOnNullInput()

Specified by:

isCalledOnNullInput in interface SqlFunction

Overrides:

isCalledOnNullInput in class BuiltInFunction

getDescription

public String getDescription()

specialize

public BuiltInScalarFunctionImplementation specialize(BoundVariables boundVariables,
                                                      int arity,
                                                      FunctionAndTypeManager functionAndTypeManager)

Specified by:

specialize in class SqlScalarFunction

reduce

public static Object reduce(Type inputType,
                            Block block,
                            Object initialIntermediateValue,
                            BinaryFunctionInterface inputFunction,
                            UnaryFunctionInterface outputFunction)