cw_regexp_extract.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.
 */

/* Extracts the first substring matched by the regular expression `regexp` in `str`, returns null if the regex doesn't have a match or either str or regexp is null. */
CREATE OR REPLACE FUNCTION ${self()}(str STRING, regexp STRING) RETURNS STRING
OPTIONS (
    description="""Extracts the first substring matched by the regular expression `regexp` in `str`, returns null if the regex doesn't have a match or either str or regexp is null."""
)
AS (
   ${ref("cw_regexp_extract_all")}(str, regexp)[SAFE_OFFSET(0)]
);