object UDTRegistration extends Serializable with Logging
This object keeps the mappings between user classes and their User Defined Types (UDTs).
Previously we use the annotation SQLUserDefinedType
to register UDTs for user classes.
However, by doing this, we add SparkSQL dependency on user classes. This object provides
alternative approach to register UDTs for user classes.
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- @DeveloperApi() @Since("3.2.0")
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- UDTRegistration.scala
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- def exists(userClassName: String): Boolean
Queries if a given user class is already registered or not.
Queries if a given user class is already registered or not.
- userClassName
the name of user class
- returns
boolean value indicates if the given user class is registered or not
- final def getClass(): Class[_ <: AnyRef]
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- def getUDTFor(userClass: String): Option[Class[_]]
Returns the Class of UserDefinedType for the name of a given user class.
Returns the Class of UserDefinedType for the name of a given user class.
- userClass
class name of user class
- returns
Option value of the Class object of UserDefinedType
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- def register(userClass: String, udtClass: String): Unit
Registers an UserDefinedType to an user class.
Registers an UserDefinedType to an user class. If the user class is already registered with another UserDefinedType, warning log message will be shown.
- userClass
the name of user class
- udtClass
the name of UserDefinedType class for the given userClass
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- Deprecated
(Since version 9)