Package dev.frostlake.executor.operators

Class WhereOperator

java.lang.Object

dev.frostlake.executor.operators.WhereOperator

All Implemented Interfaces:

Operator

public class WhereOperator
extends Object
implements Operator

WHERE clause operator - filters rows based on a predicate expression. This operator supports three evaluation modes: - SIMPLE: For single-table queries - WITH_ALIASES: For multi-table JOINs with table aliases - WITH_LATERAL_CONTEXT: For LATERAL joins with outer row context

Constructor Summary

Constructors

Constructor	Description
WhereOperator(String whereExpression)
WhereOperator(String whereExpression, WhereEvaluationMode mode)

Method Summary

Modifier and Type	Method	Description
static WhereOperator	create(String whereExpression, OperatorContext context)	Create a WHERE operator with automatic mode detection.
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

WhereOperator

public WhereOperator(String whereExpression,
 WhereEvaluationMode mode)

WhereOperator

public WhereOperator(String whereExpression)

Method Details

create

public static WhereOperator create(String whereExpression,
 OperatorContext context)

Create a WHERE operator with automatic mode detection.

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