Package org.apache.drill.exec.physical.impl.scan.convert

Enum StandardConversions.ConversionType

java.lang.Object

java.lang.Enum<StandardConversions.ConversionType>

org.apache.drill.exec.physical.impl.scan.convert.StandardConversions.ConversionType

All Implemented Interfaces:

Serializable, Comparable<StandardConversions.ConversionType>

Enclosing class:

StandardConversions

public static enum StandardConversions.ConversionType
extends Enum<StandardConversions.ConversionType>

Indicates the type of conversion needed.

Enum Constant Summary

Enum Constants

Enum Constant	Description
EXPLICIT	Conversion is needed because there is no "natural", precision-preserving conversion.
IMPLICIT	Conversion is done by the column writers.
IMPLICIT_UNSAFE	Conversion is done by the column writers.
NONE	No conversion needed.

Method Summary

Modifier and Type	Method	Description
static StandardConversions.ConversionType	valueOf(String name)	Returns the enum constant of this type with the specified name.
static StandardConversions.ConversionType[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

NONE

public static final StandardConversions.ConversionType NONE

No conversion needed. Readers generally don't provide converters in this case unless the meaning of a column must change, keeping the type, such as converting between units.

IMPLICIT

public static final StandardConversions.ConversionType IMPLICIT

Conversion is done by the column writers. Again, no converter is needed except for semantic reasons.

IMPLICIT_UNSAFE

public static final StandardConversions.ConversionType IMPLICIT_UNSAFE

Conversion is done by the column writers. No converter is needed. However, the value is subject to overflow as this is a narrowing operation. Depending on the implementation, the operation may either raise an error, or produce a value limited by the range of the target type.

EXPLICIT

public static final StandardConversions.ConversionType EXPLICIT

Conversion is needed because there is no "natural", precision-preserving conversion. Conversions must be done on an ad-hoc basis.

Method Details

values

public static StandardConversions.ConversionType[] values()

Returns an array containing the constants of this enum type, in the order they are declared.

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static StandardConversions.ConversionType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null