SqlScopedShuttle (Apache Calcite API)

java.lang.Object
- org.apache.calcite.sql.util.SqlBasicVisitor<SqlNode>
- - org.apache.calcite.sql.util.SqlShuttle
  - - org.apache.calcite.sql.validate.SqlScopedShuttle

All Implemented Interfaces:

SqlVisitor<SqlNode>

Direct Known Subclasses:

SqlValidatorImpl.Expander, SqlValidatorImpl.OrderExpressionExpander, SqlValidatorUtil.DeepCopier
```
public abstract class SqlScopedShuttle
extends SqlShuttle
```
Refinement to SqlShuttle which maintains a stack of scopes.
Derived class should override visitScoped(SqlCall) rather than SqlVisitor.visit(SqlCall).

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.calcite.sql.util.SqlShuttle
  SqlShuttle.CallCopyingArgHandler
- Nested classes/interfaces inherited from class org.apache.calcite.sql.util.SqlBasicVisitor
  SqlBasicVisitor.ArgHandler<R>, SqlBasicVisitor.ArgHandlerImpl<R>

Field Summary

Fields
Modifier and Type Field Description

private java.util.Deque<SqlValidatorScope> scopes

Constructor Summary

Constructors
Modifier Constructor Description

protected SqlScopedShuttle(SqlValidatorScope initialScope)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected SqlValidatorScope`	`getScope()`	Returns the current scope.
`SqlNode`	`visit(SqlCall call)`	Visits a call to a `SqlOperator`.
`protected SqlNode`	`visitScoped(SqlCall call)`	Visits an operator call.

Methods inherited from class org.apache.calcite.sql.util.SqlShuttle
visit, visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - scopes
```
private final java.util.Deque<SqlValidatorScope> scopes
```
- Constructor Detail
  - SqlScopedShuttle
```
protected SqlScopedShuttle(SqlValidatorScope initialScope)
```
- Method Detail
  - visit
```
public final SqlNode visit(SqlCall call)
```
    Description copied from interface: SqlVisitor
    
    Visits a call to a SqlOperator.
    
    Specified by:
    
    visit in interface SqlVisitor<SqlNode>
    
    Overrides:
    
    visit in class SqlShuttle
    
    Parameters:
    
    call - Call
    
    See Also:
    
    SqlCall.accept(SqlVisitor)
  - visitScoped
```
protected SqlNode visitScoped(SqlCall call)
```
    Visits an operator call. If the call has entered a new scope, the base class will have already modified the scope.
  - getScope
```
protected SqlValidatorScope getScope()
```
    Returns the current scope.