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