/**
* Copyright 2011-2013 FoundationDB, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.foundationdb.sql.views;
import com.foundationdb.sql.parser.*;
import com.foundationdb.sql.StandardException;
public class ViewDefinition
{
private CreateViewNode definition;
private FromSubquery subquery;
/**
* Parse the given SQL as CREATE VIEW and remember the definition.
*/
public ViewDefinition(String sql, SQLParser parser)
throws StandardException {
this(parser.parseStatement(sql), parser);
}
public ViewDefinition(StatementNode parsed, SQLParserContext parserContext)
throws StandardException {
if (parsed.getNodeType() != NodeTypes.CREATE_VIEW_NODE) {
throw new StandardException("Parsed statement was not a view");
}
definition = (CreateViewNode)parsed;
subquery = (FromSubquery)
parserContext.getNodeFactory().getNode(NodeTypes.FROM_SUBQUERY,
definition.getParsedQueryExpression(),
definition.getOrderByList(),
definition.getOffset(),
definition.getFetchFirst(),
getName().getTableName(),
definition.getResultColumns(),
null,
parserContext);
}
/**
* Get the name of the view.
*/
public TableName getName() {
return definition.getObjectName();
}
/**
* Get the text of the view definition.
*/
public String getQueryExpression() {
return definition.getQueryExpression();
}
/**
* Get the result columns for this view.
*/
public ResultColumnList getResultColumns() {
ResultColumnList rcl = subquery.getResultColumns();
if (rcl == null)
rcl = subquery.getSubquery().getResultColumns();
return rcl;
}
/**
* Get the original subquery for binding.
*/
public FromSubquery getSubquery() {
return subquery;
}
/**
* Get the view as an equivalent subquery belonging to the given context.
*/
public FromSubquery copySubquery(SQLParserContext parserContext)
throws StandardException {
return (FromSubquery)
parserContext.getNodeFactory().copyNode(subquery, parserContext);
}
/**
* @deprecated
* @see #copySubquery
*/
@Deprecated
public FromSubquery getSubquery(Visitor binder) throws StandardException {
subquery = (FromSubquery)subquery.accept(binder);
return copySubquery(subquery.getParserContext());
}
}