org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.comparison

Class BeamSqlIsNullExpression

java.lang.Object

org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression

org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.comparison.BeamSqlIsNullExpression

All Implemented Interfaces:

java.io.Serializable

public class BeamSqlIsNullExpression
extends BeamSqlExpression

BeamSqlExpression for 'IS NULL' operation.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression

operands, outputType

Constructor Summary

Constructors

Constructor and Description
BeamSqlIsNullExpression(BeamSqlExpression operand)

Method Summary

Modifier and Type	Method and Description
boolean	accept() only one operand is required.
BeamSqlPrimitive<java.lang.Boolean>	evaluate(Row inputRow, BoundedWindow window, BeamSqlExpressionEnvironment env) Apply input record Row with BoundedWindow to this expression, the output value is wrapped with BeamSqlPrimitive.

Methods inherited from class org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression

getOperands, getOutputType, numberOfOperands, op, opType, opValueEvaluated

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BeamSqlIsNullExpression

public BeamSqlIsNullExpression(BeamSqlExpression operand)

Method Detail

accept

public boolean accept()

only one operand is required.

Specified by:

accept in class BeamSqlExpression

evaluate

public BeamSqlPrimitive<java.lang.Boolean> evaluate(Row inputRow,
                                                    BoundedWindow window,
                                                    BeamSqlExpressionEnvironment env)

Description copied from class: BeamSqlExpression

Apply input record Row with BoundedWindow to this expression, the output value is wrapped with BeamSqlPrimitive.

Specified by:

evaluate in class BeamSqlExpression