public class UnresolvedFieldReference extends Attribute implements scala.Product, scala.Serializable
Constructor and Description |
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UnresolvedFieldReference(String name) |
Modifier and Type | Method and Description |
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String |
name() |
TypeInformation<?> |
resultType()
Returns the
TypeInformation for evaluating this expression. |
String |
toString() |
ExprValidationResult |
validateInput()
Check input data types, inputs number or other properties specified by this expression.
|
Attribute |
withName(String newName) |
toAttribute
children
checkEquals, childrenValid, toRexNode, valid
fastEquals, makeCopy, postOrderTransform, preOrderVisit
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
public UnresolvedFieldReference(String name)
public String name()
name
in interface NamedExpression
public TypeInformation<?> resultType()
Expression
TypeInformation
for evaluating this expression.
It is sometimes not available until the expression is valid.resultType
in class Expression
public ExprValidationResult 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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