public class BeamSqlIsNullExpression extends BeamSqlExpression
BeamSqlExpression
for 'IS NULL' operation.operands, outputType
Constructor and Description |
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BeamSqlIsNullExpression(BeamSqlExpression operand) |
Modifier and Type | Method and Description |
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boolean |
accept()
only one operand is required.
|
BeamSqlPrimitive<java.lang.Boolean> |
evaluate(BeamRecord inputRow,
BoundedWindow window)
Apply input record
BeamRecord with BoundedWindow to this expression,
the output value is wrapped with BeamSqlPrimitive . |
getOperands, getOutputType, numberOfOperands, op, opType, opValueEvaluated
public BeamSqlIsNullExpression(BeamSqlExpression operand)
public boolean accept()
accept
in class BeamSqlExpression
public BeamSqlPrimitive<java.lang.Boolean> evaluate(BeamRecord inputRow, BoundedWindow window)
BeamSqlExpression
BeamRecord
with BoundedWindow
to this expression,
the output value is wrapped with BeamSqlPrimitive
.evaluate
in class BeamSqlExpression