public class Flattening extends UnaryExpression implements scala.Product, scala.Serializable
GetCompositeField
expressions.Constructor and Description |
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Flattening(Expression child) |
Modifier and Type | Method and Description |
---|---|
Expression |
child() |
TypeInformation<?> |
resultType()
Returns the
TypeInformation for evaluating this expression. |
String |
toString() |
ValidationResult |
validateInput()
Check input data types, inputs number or other properties specified by this expression.
|
children
checkEquals, childrenValid, toRexNode, valid
fastEquals, makeCopy, postOrderTransform, preOrderVisit
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
public Flattening(Expression child)
public Expression child()
child
in class UnaryExpression
public TypeInformation<?> resultType()
Expression
TypeInformation
for evaluating this expression.
It is sometimes not available until the expression is valid.resultType
in class Expression
public ValidationResult validateInput()
Expression
ValidationSuccess
if it pass the check,
or ValidationFailure
with supplement message explaining the error.
Note: we should only call this method until childrenValid == true
validateInput
in class Expression
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