org.apache.drill.exec.expr.fn

Class FunctionUtils

java.lang.Object

org.apache.drill.exec.expr.fn.FunctionUtils

public class FunctionUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
FunctionUtils()

Method Summary

Modifier and Type	Method and Description
static TypeProtos.DataMode	getReturnTypeDataMode(List<LogicalExpression> logicalExpressions, FunctionAttributes attributes) Calculates return type data mode based on give logical expressions.

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionUtils

public FunctionUtils()

Method Detail

getReturnTypeDataMode

public static TypeProtos.DataMode getReturnTypeDataMode(List<LogicalExpression> logicalExpressions,
                                                        FunctionAttributes attributes)

Calculates return type data mode based on give logical expressions. If null handling strategy is internal, returns return value data mode. If null handling strategy is null if null and at least one of the input types are nullable, return nullable data mode.

Parameters:

logicalExpressions - logical expressions

attributes - function attributes

Returns:

data mode