Package org.apache.drill.exec.expr.fn.output

Class StringCastReturnTypeInference

java.lang.Object

org.apache.drill.exec.expr.fn.output.StringCastReturnTypeInference

All Implemented Interfaces:

ReturnTypeInference

public class StringCastReturnTypeInference
extends Object
implements ReturnTypeInference

Return type calculation implementation for functions with return type set as FunctionTemplate.ReturnType.STRING_CAST.

Field Summary

Fields

Modifier and Type	Field	Description
static final StringCastReturnTypeInference	INSTANCE

Constructor Summary

Constructors

Constructor	Description
StringCastReturnTypeInference()

Method Summary

Modifier and Type	Method	Description
TypeProtos.MajorType	getType(List<LogicalExpression> logicalExpressions, FunctionAttributes attributes)	Defines function return type and sets cast length as type precision if cast length is simple long expression.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final StringCastReturnTypeInference INSTANCE

Constructor Details

StringCastReturnTypeInference

public StringCastReturnTypeInference()

Method Details

getType

public TypeProtos.MajorType getType(List<LogicalExpression> logicalExpressions,
 FunctionAttributes attributes)

Defines function return type and sets cast length as type precision if cast length is simple long expression.

Specified by:

getType in interface ReturnTypeInference

Parameters:

logicalExpressions - logical expressions

attributes - function attributes

Returns:

return type