gudusoft.gsqlparser.resolver2.scope

Class JoinScope

Object

gudusoft.gsqlparser.resolver2.scope.AbstractScope

gudusoft.gsqlparser.resolver2.scope.ListBasedScope

gudusoft.gsqlparser.resolver2.scope.JoinScope

All Implemented Interfaces:

IScope

public class JoinScope
extends ListBasedScope

Scope for JOIN operations. Handles nullable semantics for different JOIN types. JOIN semantics: - INNER JOIN: both sides non-nullable - LEFT JOIN: left non-nullable, right nullable - RIGHT JOIN: left nullable, right non-nullable - FULL JOIN: both sides nullable - CROSS JOIN: both sides non-nullable Example: FROM users u LEFT JOIN orders o ON u.id = o.user_id ^^^^^ ^^^^^^ leftNamespace rightNamespace (nullable)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JoinScope.NullableSemantics Nullable semantics for a JOIN operation

Field Summary

Fields inherited from class gudusoft.gsqlparser.resolver2.scope.ListBasedScope

children

Fields inherited from class gudusoft.gsqlparser.resolver2.scope.AbstractScope

node, parent, scopeType

Constructor Summary

Constructors

Constructor and Description
JoinScope(IScope parent, TJoinExpr joinExpr)

Method Summary

Modifier and Type	Method and Description
TJoinExpr	getJoinExpr()
INamespace	getLeftNamespace()
static JoinScope.NullableSemantics	getNullableSemantics(TJoinExpr joinExpr) Determine nullable semantics based on JOIN type
INamespace	getRightNamespace()
boolean	isLeftNullable()
boolean	isRightNullable()
void	setLeft(INamespace namespace, String alias, boolean nullable) Set the left side of the JOIN
void	setRight(INamespace namespace, String alias, boolean nullable) Set the right side of the JOIN
String	toString()

Methods inherited from class gudusoft.gsqlparser.resolver2.scope.ListBasedScope

addChild, getChildren, getVisibleNamespaces, resolve, resolveInNamespace, resolveTable

Methods inherited from class gudusoft.gsqlparser.resolver2.scope.AbstractScope

fullyQualify, getNode, getParent, getScopeType, isWithin

Methods inherited from class Object

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

Constructor Detail

JoinScope

public JoinScope(IScope parent,
                 TJoinExpr joinExpr)

Method Detail

setLeft

public void setLeft(INamespace namespace,
                    String alias,
                    boolean nullable)

Set the left side of the JOIN

setRight

public void setRight(INamespace namespace,
                     String alias,
                     boolean nullable)

Set the right side of the JOIN

getNullableSemantics

public static JoinScope.NullableSemantics getNullableSemantics(TJoinExpr joinExpr)

Determine nullable semantics based on JOIN type

getJoinExpr

public TJoinExpr getJoinExpr()

getLeftNamespace

public INamespace getLeftNamespace()

getRightNamespace

public INamespace getRightNamespace()

isLeftNullable

public boolean isLeftNullable()

isRightNullable

public boolean isRightNullable()

toString

public String toString()

Overrides:

toString in class ListBasedScope