gudusoft.gsqlparser.resolver2.scope

Class SelectScope

Object

gudusoft.gsqlparser.resolver2.scope.AbstractScope

gudusoft.gsqlparser.resolver2.scope.SelectScope

All Implemented Interfaces:

IScope

public class SelectScope
extends AbstractScope

Scope for SELECT statement. This is typically the root scope for a query. Contains: - FROM clause scope (child) - WHERE clause scope (child) - SELECT list namespace (for ORDER BY to reference)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SelectScope.UsingMerge One {@code JOIN ...

Field Summary

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

node, parent, scopeType

Constructor Summary

Constructors

Constructor and Description
SelectScope(IScope parent, TParseTreeNode node)

Method Summary

Modifier and Type	Method and Description
void	addUsingMerge(SelectScope.UsingMerge merge) Records a JOIN USING merge of this scope.
SelectScope.UsingMerge	findCoveringMerge(EDbVendor vendor, String columnName, List<TTable> candidateTables) The merge that covers this column name and EVERY one of the given relations, or null.
SelectScope.UsingMerge	findCoveringMerge(IdentifierService names, String columnName, List<TTable> candidateTables) findCoveringMerge(gudusoft.gsqlparser.EDbVendor, String, java.util.List) with the column names compared under one analysis's identifier rules (a configured profile).
FromScope	getFromScope()
INamespace	getSelectListNamespace()
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.
IScope	getWhereScope()
void	resolve(List<String> names, INameMatcher matcher, boolean deep, IResolved resolved) Resolve a name within this SELECT scope.
INamespace	resolveTable(String tableName) Default implementation: delegate to parent
void	setFromScope(FromScope fromScope)
void	setSelectListNamespace(INamespace namespace)
void	setWhereScope(IScope whereScope)
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

SelectScope

public SelectScope(IScope parent,
                   TParseTreeNode node)

Method Detail

setFromScope

public void setFromScope(FromScope fromScope)

getFromScope

public FromScope getFromScope()

setWhereScope

public void setWhereScope(IScope whereScope)

getWhereScope

public IScope getWhereScope()

setSelectListNamespace

public void setSelectListNamespace(INamespace namespace)

getSelectListNamespace

public INamespace getSelectListNamespace()

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 SELECT 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

addUsingMerge

public void addUsingMerge(SelectScope.UsingMerge merge)

Records a JOIN USING merge of this scope.

findCoveringMerge

public SelectScope.UsingMerge findCoveringMerge(EDbVendor vendor,
                                                String columnName,
                                                List<TTable> candidateTables)

The merge that covers this column name and EVERY one of the given relations, or null.

Requiring the merge to cover every candidate is what keeps a third relation carrying the same name from being swallowed: those candidates are not merged with anything and the reference really is ambiguous.

findCoveringMerge

public SelectScope.UsingMerge findCoveringMerge(IdentifierService names,
                                                String columnName,
                                                List<TTable> candidateTables)

findCoveringMerge(gudusoft.gsqlparser.EDbVendor, String, java.util.List) with the column names compared under one analysis's identifier rules (a configured profile).