gudusoft.gsqlparser.resolver2.iterative

Class ResolutionPass

Object

gudusoft.gsqlparser.resolver2.iterative.ResolutionPass

public class ResolutionPass
extends Object

Represents a single pass of iterative resolution.

During iterative resolution, the resolver may need multiple passes to fully resolve all columns. Each pass attempts to resolve more columns based on information discovered in previous passes.

Example scenario requiring multiple passes:

 WITH cte1 AS (SELECT * FROM t1),         -- Pass 1: Can't fully resolve *
      cte2 AS (SELECT c1, c2 FROM cte1)   -- Pass 1: References cte1.c1, c1.c2
 SELECT * FROM cte2                       -- Pass 2: Can now resolve based on cte2
 

Each pass tracks: - Pass number (1, 2, 3, ...) - Columns resolved in this pass - Columns still unresolved - Whether progress was made - Time taken

Constructor Summary

Constructors

Constructor and Description
ResolutionPass(int passNumber, ResolutionStatistics beforeStats)

Method Summary

Modifier and Type	Method and Description
void	complete(ResolutionStatistics afterStats) Complete this pass with final statistics.
ResolutionStatistics	getAfterStats()
ResolutionStatistics	getBeforeStats()
int	getColumnsResolvedInPass()
int	getNewInferences()
int	getPassNumber()
String	getStopReason()
String	getSummary() Get a summary of this pass.
long	getTimeTaken()
boolean	madeProgress()
void	setNewInferences(int count) Set the number of new inferences made in this pass.
void	setStopReason(String reason) Set the reason why iteration stopped after this pass.
String	toString()

Methods inherited from class Object

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

Constructor Detail

ResolutionPass

public ResolutionPass(int passNumber,
                      ResolutionStatistics beforeStats)

Method Detail

complete

public void complete(ResolutionStatistics afterStats)

Complete this pass with final statistics.

Parameters:

afterStats - statistics after this pass

setNewInferences

public void setNewInferences(int count)

Set the number of new inferences made in this pass.

Parameters:

count - inference count

setStopReason

public void setStopReason(String reason)

Set the reason why iteration stopped after this pass.

Parameters:

reason - stop reason

getPassNumber

public int getPassNumber()

getBeforeStats

public ResolutionStatistics getBeforeStats()

getAfterStats

public ResolutionStatistics getAfterStats()

getColumnsResolvedInPass

public int getColumnsResolvedInPass()

getNewInferences

public int getNewInferences()

getTimeTaken

public long getTimeTaken()

madeProgress

public boolean madeProgress()

getStopReason

public String getStopReason()

getSummary

public String getSummary()

Get a summary of this pass.

Returns:

summary string

toString

public String toString()

Overrides:

toString in class Object