gudusoft.gsqlparser.ir.semantic.joinanalysis

Class ColumnResolution

Object

gudusoft.gsqlparser.ir.semantic.joinanalysis.ColumnResolution

public final class ColumnResolution
extends Object

Resolution of a ColumnRef to its base relation / final table (GAP 5). Pairs the resolved qualified name with an explicit ColumnResolutionStatus so an unresolved column is surfaced honestly rather than as a silent empty.

Invariants:

• ColumnResolutionStatus.RESOLVED ⇒ resolvedTableQualifiedName != null.
• ColumnResolutionStatus.UNRESOLVED / ColumnResolutionStatus.NOT_APPLICABLE ⇒ resolvedTableQualifiedName == null; a final table is never fabricated.

Immutable. Introduced by join-analysis slice 162 (S1); populated from ColumnBinding in slice 165 (S4).

Field Summary

Fields

Modifier and Type	Field and Description
static ColumnResolution	NOT_APPLICABLE Shared singleton for the not-applicable case.
static ColumnResolution	UNRESOLVED Shared singleton for the unresolved case.

Constructor Summary

Constructors

Constructor and Description
ColumnResolution(String resolvedTableQualifiedName, ColumnResolutionStatus status)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
String	getResolvedTableQualifiedName() Null when not ColumnResolutionStatus.RESOLVED.
ColumnResolutionStatus	getStatus()
int	hashCode()
boolean	isResolved()
static ColumnResolution	resolved(String resolvedTableQualifiedName) Convenience: build a RESOLVED resolution.
String	toString()

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

UNRESOLVED

public static final ColumnResolution UNRESOLVED

Shared singleton for the unresolved case.

NOT_APPLICABLE

public static final ColumnResolution NOT_APPLICABLE

Shared singleton for the not-applicable case.

Constructor Detail

ColumnResolution

public ColumnResolution(String resolvedTableQualifiedName,
                        ColumnResolutionStatus status)

Method Detail

resolved

public static ColumnResolution resolved(String resolvedTableQualifiedName)

Convenience: build a RESOLVED resolution.

getResolvedTableQualifiedName

public String getResolvedTableQualifiedName()

Null when not ColumnResolutionStatus.RESOLVED.

getStatus

public ColumnResolutionStatus getStatus()

isResolved

public boolean isResolved()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object