Package dev.frostlake.executor.operators

Class HavingOperator

java.lang.Object

dev.frostlake.executor.operators.HavingOperator

All Implemented Interfaces:

Operator

public class HavingOperator
extends Object
implements Operator

HAVING clause operator - filters rows after GROUP BY based on aggregate conditions. HAVING is applied after GROUP BY and filters rows based on aggregate values. Unlike WHERE (which filters before grouping), HAVING filters after aggregation.

Constructor Summary

Constructors

Constructor	Description
HavingOperator(String havingExpression, HavingEvaluator havingEvaluator)

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

HavingOperator

public HavingOperator(String havingExpression,
 HavingEvaluator havingEvaluator)

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