Package org.apache.calcite.sql.validate

Class SqlScopedShuttle

java.lang.Object

org.apache.calcite.sql.util.SqlBasicVisitor<@Nullable SqlNode>

org.apache.calcite.sql.util.SqlShuttle

org.apache.calcite.sql.validate.SqlScopedShuttle

All Implemented Interfaces:

SqlVisitor<SqlNode>

Direct Known Subclasses:

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>

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SqlScopedShuttle(SqlValidatorScope initialScope)

Method Summary

Modifier and Type	Method	Description
protected SqlValidatorScope	getScope()	Returns the current scope.
final @Nullable SqlNode	visit(SqlCall call)	Visits a call to a SqlOperator.
protected @Nullable 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

Methods inherited from interface org.apache.calcite.sql.util.SqlVisitor

visitAll, visitNode

Constructor Details

SqlScopedShuttle

protected SqlScopedShuttle(SqlValidatorScope initialScope)

Method Details

visit

public final @Nullable 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 @Nullable 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.