Package dev.frostlake.executor.expressions

Enum Class CastFieldsModifier

java.lang.Object

java.lang.Enum<CastFieldsModifier>

dev.frostlake.executor.expressions.CastFieldsModifier

All Implemented Interfaces:

Serializable, Comparable<CastFieldsModifier>, Constable

public enum CastFieldsModifier
extends Enum<CastFieldsModifier>

The optional field modifier of CAST(expr AS <structured type> [RENAME FIELDS | ADD FIELDS]).

Live-verified: RENAME FIELDS maps the source's fields POSITIONALLY onto the target's field names (counts must match), ADD FIELDS matches BY NAME and fills the fields only the target declares with NULL (the target must list every source field). Both require a STRUCTURED source and a STRUCTURED target.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
ADD	ADD FIELDS — by-name carry-over, new fields default to NULL.
NONE	No modifier — a plain CAST(expr AS type).
RENAME	RENAME FIELDS — positional re-labelling of the source's fields.

Method Summary

Modifier and Type	Method	Description
String	getSql()	The modifier as written in SQL, e.g.
static CastFieldsModifier	valueOf(String name)	Returns the enum constant of this class with the specified name.
static CastFieldsModifier[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, 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 CastFieldsModifier NONE

No modifier — a plain CAST(expr AS type).

RENAME

public static final CastFieldsModifier RENAME

RENAME FIELDS — positional re-labelling of the source's fields.

ADD

public static final CastFieldsModifier ADD

ADD FIELDS — by-name carry-over, new fields default to NULL.

Method Details

values

public static CastFieldsModifier[] values()

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

Returns:

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

valueOf

public static CastFieldsModifier valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name

NullPointerException - if the argument is null

getSql

public String getSql()

The modifier as written in SQL, e.g. RENAME FIELDS.