xuefuz commented on a change in pull request #8007: [FLINK-11474][table] Add ReadableCatalog, ReadableWritableCatalog, and other … URL: https://github.com/apache/flink/pull/8007#discussion_r274898608
########## File path: flink-table/flink-table-common/src/main/java/org/apache/flink/table/catalog/CatalogView.java ########## @@ -0,0 +1,47 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 org.apache.flink.table.catalog; + +/** + * Represents a view in a catalog. + */ +public interface CatalogView extends CommonTable { + + /** + * Original text of the view definition. + * + * @return the original string literal provided by the user. + */ + String getOriginalQuery(); + + /** + * Expanded text of the original view definition + * This is needed because the context such as current DB is + * lost after the session, in which view is defined, is gone. + * Expanded query text takes care of this, as an example. + * + * <p>For example, for a view that is defined in the context of "default" database with a query {@code select * from + * test1}, the expanded query text might become {@code select `test1`.`name`, `test1`.`value` from `default`.`test1`}, + * where table test1 resides in database "default" and has two columns ("name" and "value"). + * + * @return the view definition in expanded text. + */ + String getExpandedQuery(); Review comment: Yes. Both of them are stored in the catalog at least for Hive. However, when the view is used for query, only expanded query is used. So, the problem you referred to can be avoided. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
