trait BoundFunction extends Function
Represents a function that is bound to an input type.
- Annotations
- @Evolving()
- Source
- BoundFunction.java
- Since
3.2.0
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Abstract Value Members
- abstract def inputTypes(): Array[DataType]
Returns the required
data typesof the input values to this function.Returns the required
data typesof the input values to this function.If the types returned differ from the types passed to
UnboundFunction#bind(StructType), Spark will cast input values to the required data types. This allows implementations to delegate input value casting to Spark.- returns
an array of input value data types
- abstract def name(): String
A name to identify this function.
A name to identify this function. Implementations should provide a meaningful name, like the database and function name from the catalog.
- Definition Classes
- Function
- abstract def resultType(): DataType
Returns the
data typeof values produced by this function.Returns the
data typeof values produced by this function.For example, a "plus" function may return
IntegerTypewhen it is bound to arguments that are alsoIntegerType.- returns
a data type for values produced by this function
Concrete Value Members
- final def !=(arg0: Any): Boolean
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- final def ##: Int
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- final def ==(arg0: Any): Boolean
- Definition Classes
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- final def asInstanceOf[T0]: T0
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- def canonicalName(): String
Returns the canonical name of this function, used to determine if functions are equivalent.
Returns the canonical name of this function, used to determine if functions are equivalent.
The canonical name is used to determine whether two functions are the same when loaded by different catalogs. For example, the same catalog implementation may be used for by two environments, "prod" and "test". Functions produced by the catalogs may be equivalent, but loaded using different names, like "test.func_name" and "prod.func_name".
Names returned by this function should be unique and unlikely to conflict with similar functions in other catalogs. For example, many catalogs may define a "bucket" function with a different implementation. Adding context, like "com.mycompany.bucket(string)", is recommended to avoid unintentional collisions.
- returns
a canonical name for this function
- def clone(): AnyRef
- Attributes
- protected[lang]
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- Annotations
- @throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
- final def eq(arg0: AnyRef): Boolean
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- def equals(arg0: AnyRef): Boolean
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- final def getClass(): Class[_ <: AnyRef]
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- @IntrinsicCandidate() @native()
- def hashCode(): Int
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- Annotations
- @IntrinsicCandidate() @native()
- def isDeterministic(): Boolean
Returns whether this function result is deterministic.
Returns whether this function result is deterministic.
By default, functions are assumed to be deterministic. Functions that are not deterministic should override this method so that Spark can ensure the function runs only once for a given input.
- returns
true if this function is deterministic, false otherwise
- final def isInstanceOf[T0]: Boolean
- Definition Classes
- Any
- def isResultNullable(): Boolean
Returns whether the values produced by this function may be null.
Returns whether the values produced by this function may be null.
For example, a "plus" function may return false when it is bound to arguments that are always non-null, but true when either argument may be null.
- returns
true if values produced by this function may be null, false otherwise
- final def ne(arg0: AnyRef): Boolean
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- final def notify(): Unit
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- @IntrinsicCandidate() @native()
- final def notifyAll(): Unit
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- @IntrinsicCandidate() @native()
- final def synchronized[T0](arg0: => T0): T0
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- def toString(): String
- Definition Classes
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- final def wait(arg0: Long, arg1: Int): Unit
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- Annotations
- @throws(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long): Unit
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- @throws(classOf[java.lang.InterruptedException]) @native()
- final def wait(): Unit
- Definition Classes
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- Annotations
- @throws(classOf[java.lang.InterruptedException])
Deprecated Value Members
- def finalize(): Unit
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- protected[lang]
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- Annotations
- @throws(classOf[java.lang.Throwable]) @Deprecated
- Deprecated
(Since version 9)