gudusoft.gsqlparser.resolver2.iterative

Class StandardResolutionStrategy

Object

gudusoft.gsqlparser.resolver2.iterative.StandardResolutionStrategy

All Implemented Interfaces:

ResolutionStrategy

public class StandardResolutionStrategy
extends Object
implements ResolutionStrategy

Standard resolution strategy.

This is the default strategy that works well for most queries.

Strategy behavior: - Pass 1: Basic resolution without inference - Pass 2+: Enable inference and star expansion - Push-down: Enabled from pass 2 onward - Adaptive: Adjusts based on progress

This strategy balances: - Quick results (first pass is fast) - Completeness (later passes handle complex cases) - Efficiency (doesn't over-iterate)

Constructor Summary

Constructors

Constructor and Description
StandardResolutionStrategy()
StandardResolutionStrategy(boolean aggressiveInference, int inferenceThreshold)

Method Summary

Modifier and Type	Method and Description
String	getDescription() Get a description of this strategy.
String	getName() Get the name of this strategy.
void	preparePass(int passNumber, ResolutionStatistics previousStats) Prepare for a new pass.
boolean	shouldExpandStars(int passNumber, ResolutionStatistics previousStats) Determine if this strategy should expand star columns in the current pass.
boolean	shouldPerformInference(int passNumber, ResolutionStatistics previousStats) Determine if this strategy should perform inference in the current pass.
boolean	shouldPushDownColumns(int passNumber, ResolutionStatistics previousStats) Determine if this strategy should push down column requirements in the current pass.
String	toString()

Methods inherited from class Object

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

Constructor Detail

StandardResolutionStrategy

public StandardResolutionStrategy()

StandardResolutionStrategy

public StandardResolutionStrategy(boolean aggressiveInference,
                                  int inferenceThreshold)

Method Detail

getName

public String getName()

Description copied from interface: ResolutionStrategy

Get the name of this strategy.

Specified by:

getName in interface ResolutionStrategy

Returns:

strategy name

shouldPerformInference

public boolean shouldPerformInference(int passNumber,
                                      ResolutionStatistics previousStats)

Description copied from interface: ResolutionStrategy

Determine if this strategy should perform inference in the current pass.

Specified by:

shouldPerformInference in interface ResolutionStrategy

Parameters:

passNumber - the current pass number

previousStats - statistics from previous pass (null for first pass)

Returns:

true if inference should be performed

shouldExpandStars

public boolean shouldExpandStars(int passNumber,
                                 ResolutionStatistics previousStats)

Description copied from interface: ResolutionStrategy

Determine if this strategy should expand star columns in the current pass.

Specified by:

shouldExpandStars in interface ResolutionStrategy

Parameters:

passNumber - the current pass number

previousStats - statistics from previous pass (null for first pass)

Returns:

true if star expansion should be performed

shouldPushDownColumns

public boolean shouldPushDownColumns(int passNumber,
                                     ResolutionStatistics previousStats)

Description copied from interface: ResolutionStrategy

Determine if this strategy should push down column requirements in the current pass.

Specified by:

shouldPushDownColumns in interface ResolutionStrategy

Parameters:

passNumber - the current pass number

previousStats - statistics from previous pass (null for first pass)

Returns:

true if push-down should be performed

preparePass

public void preparePass(int passNumber,
                        ResolutionStatistics previousStats)

Description copied from interface: ResolutionStrategy

Prepare for a new pass. Strategy can adjust its behavior based on previous results.

Specified by:

preparePass in interface ResolutionStrategy

Parameters:

passNumber - the upcoming pass number

previousStats - statistics from previous pass (null for first pass)

getDescription

public String getDescription()

Description copied from interface: ResolutionStrategy

Get a description of this strategy.

Specified by:

getDescription in interface ResolutionStrategy

Returns:

strategy description

toString

public String toString()

Overrides:

toString in class Object