gudusoft.gsqlparser.resolver2.scope

Class MergeScope

Object

gudusoft.gsqlparser.resolver2.scope.AbstractScope

gudusoft.gsqlparser.resolver2.scope.MergeScope

All Implemented Interfaces:

IScope

public class MergeScope
extends AbstractScope

Scope for MERGE statement. Contains: - Target table (MERGE INTO table) - Source table/subquery (USING clause) - ON clause condition - WHEN MATCHED/NOT MATCHED clauses Example: MERGE INTO archive ar USING (SELECT activity, description FROM activities) ac ON (ar.activity = ac.activity) WHEN MATCHED THEN UPDATE SET description = ac.description WHEN NOT MATCHED THEN INSERT (activity, description) VALUES (ac.activity, ac.description) Resolution strategy: - All column references resolve from target table or source table/subquery - Qualified names (ar.col, ac.col) resolve to specific table - Unqualified names search all visible tables

Field Summary

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

node, parent, scopeType

Constructor Summary

Constructors

Constructor and Description
MergeScope(IScope parent, TMergeSqlStatement stmt)

Method Summary

Modifier and Type	Method and Description
FromScope	getFromScope()
TMergeSqlStatement	getMergeStatement()
List<INamespace>	getVisibleNamespaces() The namespaces a name in this scope can see: the scope's own, then those of its lookup parent, as AbstractScope.resolve(java.util.List<java.lang.String>, gudusoft.gsqlparser.resolver2.matcher.INameMatcher, boolean, gudusoft.gsqlparser.resolver2.scope.IResolved) walks them.
void	resolve(List<String> names, INameMatcher matcher, boolean deep, IResolved resolved) Resolve a name within this MERGE scope.
INamespace	resolveTable(String tableName) Default implementation: delegate to parent
void	setFromScope(FromScope fromScope)
String	toString()

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

addAllDistinct, addChild, addOwnNamespaces, fullyQualify, getChildren, getLookupParent, getNode, getParent, getScopeType, isWithin, setLookupParent

Methods inherited from class Object

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

Constructor Detail

MergeScope

public MergeScope(IScope parent,
                  TMergeSqlStatement stmt)

Method Detail

setFromScope

public void setFromScope(FromScope fromScope)

getFromScope

public FromScope getFromScope()

getMergeStatement

public TMergeSqlStatement getMergeStatement()

resolveTable

public INamespace resolveTable(String tableName)

Description copied from class: AbstractScope

Default implementation: delegate to parent

Specified by:

resolveTable in interface IScope

Overrides:

resolveTable in class AbstractScope

Parameters:

tableName - Table name or alias

Returns:

Namespace if found, null otherwise

getVisibleNamespaces

public List<INamespace> getVisibleNamespaces()

Description copied from class: AbstractScope

The namespaces a name in this scope can see: the scope's own, then those of its lookup parent, as AbstractScope.resolve(java.util.List<java.lang.String>, gudusoft.gsqlparser.resolver2.matcher.INameMatcher, boolean, gudusoft.gsqlparser.resolver2.scope.IResolved) walks them. A non-lateral derived table or CTE body hides its owner's FROM scope by a lookup parent (ScopeBuilder.setLookupParent), so the structural parent is not followed here either (Mantis 4820, Codex review).

Specified by:

getVisibleNamespaces in interface IScope

Overrides:

getVisibleNamespaces in class AbstractScope

Returns:

List of visible namespaces

resolve

public void resolve(List<String> names,
                    INameMatcher matcher,
                    boolean deep,
                    IResolved resolved)

Resolve a name within this MERGE scope. Resolution strategy: 1. For qualified names (t.col): find table t in FROM scope, then resolve col 2. For unqualified names (col): search all visible namespaces in FROM scope 3. Delegate to parent for names not found locally

Specified by:

resolve in interface IScope

Overrides:

resolve in class AbstractScope

Parameters:

names - Name parts (e.g., ["schema", "table", "column"])

matcher - Name matcher for case sensitivity rules

deep - Whether to recursively resolve into record fields

resolved - Callback to collect all matches

toString

public String toString()

Overrides:

toString in class AbstractScope