public class CharLength extends UnaryExpression implements scala.Product, scala.Serializable
str
.Constructor and Description |
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CharLength(Expression child) |
Modifier and Type | Method and Description |
---|---|
Expression |
child() |
TypeInformation<?> |
resultType()
Returns the
TypeInformation for evaluating this expression. |
org.apache.calcite.rex.RexNode |
toRexNode(org.apache.calcite.tools.RelBuilder relBuilder)
Convert Expression to its counterpart in Calcite, i.e.
|
String |
toString() |
ExprValidationResult |
validateInput()
Check input data types, inputs number or other properties specified by this expression.
|
children
checkEquals, childrenValid, valid
fastEquals, makeCopy, postOrderTransform, preOrderVisit
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
public CharLength(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 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
public org.apache.calcite.rex.RexNode toRexNode(org.apache.calcite.tools.RelBuilder relBuilder)
Expression
toRexNode
in class Expression
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