ahmedabu98 commented on code in PR #37539: URL: https://github.com/apache/beam/pull/37539#discussion_r2874673692
########## website/www/site/content/en/documentation/dsls/sql/ddl/overview.md: ########## @@ -0,0 +1,53 @@ +--- +type: languages +title: "Beam SQL DDL Overview" +--- +<!-- +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. +--> + +# Beam SQL DDL Overview + +Beam SQL provides a robust hierarchy for managing metadata for external data sources. Instead of treating all tables as flat objects, Beam SQL utilizes a three-tier namespace system: +1. Catalog: The highest level container (e.g. a Glue Catalog connected to S3 or a BigLake Catalog connected to GCS). +2. Database: A logical namespace within a Catalog (often maps to "namespace" in systems like Iceberg). +3. Table: The actual data entity containing schema and rows. + +This structure allows users to connect to multiple disparate systems (e.g., a production BigQuery catalog and a dev Iceberg catalog) simultaneously and switch contexts seamlessly. Review Comment: Yep, just added some more language to include this -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
