org.eigenbase.sql.validate
Class SqlValidatorImpl.OrderExpressionExpander

java.lang.Object
  org.eigenbase.sql.util.SqlBasicVisitor<SqlNode>
      org.eigenbase.sql.util.SqlShuttle
          org.eigenbase.sql.validate.SqlScopedShuttle
              org.eigenbase.sql.validate.SqlValidatorImpl.OrderExpressionExpander

All Implemented Interfaces:

SqlVisitor<SqlNode>

Enclosing class:

SqlValidatorImpl

 class SqlValidatorImpl.OrderExpressionExpander
extends SqlScopedShuttle

Shuttle which walks over an expression in the ORDER BY clause, replacing usages of aliases with the underlying expression.

Nested Class Summary

Nested classes/interfaces inherited from class org.eigenbase.sql.util.SqlShuttle

SqlShuttle.CallCopyingArgHandler

Nested classes/interfaces inherited from class org.eigenbase.sql.util.SqlBasicVisitor

SqlBasicVisitor.ArgHandler<R>, SqlBasicVisitor.ArgHandlerImpl<R>

Field Summary

private List<String>	aliasList
private SqlNode	root
private SqlSelect	select

Constructor Summary

SqlValidatorImpl.OrderExpressionExpander(SqlSelect select, SqlNode root)

Method Summary

SqlNode	go()
private SqlNode	nthSelectItem(int ordinal, SqlParserPos pos) Returns the ordinalth item in the select list.
SqlNode	visit(SqlIdentifier id) Visits an identifier.
SqlNode	visit(SqlLiteral literal) Visits a literal.
protected SqlNode	visitScoped(SqlCall call) Visits an operator call.

Methods inherited from class org.eigenbase.sql.validate.SqlScopedShuttle

getScope, visit

Methods inherited from class org.eigenbase.sql.util.SqlShuttle

visit, visit, visit, visit

Methods inherited from class java.lang.Object

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

Field Detail

aliasList

private final List<String> aliasList

select

private final SqlSelect select

root

private final SqlNode root

Constructor Detail

SqlValidatorImpl.OrderExpressionExpander

SqlValidatorImpl.OrderExpressionExpander(SqlSelect select,
                                         SqlNode root)

Method Detail

go

public SqlNode go()

visit

public SqlNode visit(SqlLiteral literal)

Description copied from interface: SqlVisitor

Visits a literal.

Specified by:

visit in interface SqlVisitor<SqlNode>

Overrides:

visit in class SqlShuttle

Parameters:

literal - Literal

See Also:

SqlLiteral.accept(SqlVisitor)

nthSelectItem

private SqlNode nthSelectItem(int ordinal,
                              SqlParserPos pos)

Returns the ordinalth item in the select list.

visit

public SqlNode visit(SqlIdentifier id)

Description copied from interface: SqlVisitor

Visits an identifier.

Specified by:

visit in interface SqlVisitor<SqlNode>

Overrides:

visit in class SqlShuttle

Parameters:

id - identifier

See Also:

SqlIdentifier.accept(SqlVisitor)

visitScoped

protected SqlNode visitScoped(SqlCall call)

Description copied from class: SqlScopedShuttle

Visits an operator call. If the call has entered a new scope, the base class will have already modified the scope.

Overrides:

visitScoped in class SqlScopedShuttle