-- 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.

DECLARE
        v_count number:=0;
BEGIN
        select count(*) into v_count from user_tab_cols where table_name='X_GDS_DATASET' and column_name='VALIDITY_SCHEDULE';
        if (v_count = 0) then
                execute immediate 'ALTER TABLE x_gds_dataset ADD validity_schedule CLOB DEFAULT NULL NULL';
        end if;

        select count(*) into v_count from user_tab_cols where table_name='X_GDS_DATASET' and column_name='LABELS';
        if (v_count = 0) then
                execute immediate 'ALTER TABLE x_gds_dataset ADD labels CLOB DEFAULT NULL NULL';
        end if;

        select count(*) into v_count from user_tab_cols where table_name='X_GDS_DATASET' and column_name='KEYWORDS';
        if (v_count = 0) then
                execute immediate 'ALTER TABLE x_gds_dataset ADD keywords CLOB DEFAULT NULL NULL';
        end if;
        commit;
END;/