cw_url_extract_file.sqlx

config { hasOutput: true }
/*
 * Copyright 2022 Google 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.
 */

/* Extract the file from a url, returns "" (empty string) string if no file is found. */
CREATE OR REPLACE FUNCTION ${self()}(url STRING) RETURNS STRING 
OPTIONS (
    description="""Extract the file from a url, returns "" (empty string) string if no file is found."""
)
AS (
  (WITH a AS (
   SELECT ${ref("cw_url_extract_path")}(url) AS path, ${ref("cw_url_extract_query")}(url) AS query
  ) SELECT IF(a.query is null or length(a.query) = 0, path, concat(path, "?", query)) FROM a)
);