Package dev.frostlake.executor.operators

Class QualifyOperator

java.lang.Object

dev.frostlake.executor.operators.QualifyOperator

All Implemented Interfaces:

Operator

public class QualifyOperator
extends Object
implements Operator

QUALIFY clause operator - filters rows based on window function results. QUALIFY is similar to HAVING but works on window functions instead of aggregates. It filters rows after window functions have been computed.

Constructor Summary

Constructors

Constructor	Description
QualifyOperator(String qualifyExpression, QualifyEvaluator qualifyEvaluator)

Method Summary

Modifier and Type	Method	Description
List<Row>	execute(List<Row> input, OperatorContext context)	Execute this operator on the input rows.
String	getDescription()	Get a description of this operator for debugging/logging.

Methods inherited from class java.lang.Object

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

Constructor Details

QualifyOperator

public QualifyOperator(String qualifyExpression,
 QualifyEvaluator qualifyEvaluator)

Method Details

execute

public List<Row> execute(List<Row> input,
 OperatorContext context)

Description copied from interface: Operator

Execute this operator on the input rows.

Specified by:

execute in interface Operator

Parameters:

input - The input rows from the previous operator

context - The execution context containing table metadata and other information

Returns:

The output rows after applying this operator

getDescription

public String getDescription()

Description copied from interface: Operator

Get a description of this operator for debugging/logging.

Specified by:

getDescription in interface Operator

Returns:

A human-readable description of the operator