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@ -14,3 +14,37 @@
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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-- alter table `t_ds_worker_group` add `description` varchar(256);
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drop procedure if exists add_column_safety;
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delimiter d//
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create procedure add_column_safety(target_table_name varchar(256), target_column varchar(256),
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target_column_type varchar(256), sths_else varchar(256))
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begin
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declare target_database varchar(256);
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select database() into target_database;
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IF EXISTS(SELECT *
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FROM information_schema.COLUMNS
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WHERE COLUMN_NAME = target_column
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AND TABLE_NAME = target_table_name
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)
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THEN
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set @statement =
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concat('alter table ', target_table_name, ' change column ', target_column, ' ', target_column, ' ',
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target_column_type, ' ',
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sths_else);
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PREPARE STMT_c FROM @statement;
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EXECUTE STMT_c;
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ELSE
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set @statement =
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concat('alter table ', target_table_name, ' add column ', target_column, ' ', target_column_type, ' ',
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sths_else);
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PREPARE STMT_a FROM @statement;
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EXECUTE STMT_a;
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END IF;
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end;
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d//
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delimiter ;
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-- ALTER TABLE t_ds_worker_group ADD COLUMN description varchar(255) DEFAULT NULL COMMENT 'ds worker group description';
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call add_column_safety('t_ds_worker_group','description', 'varchar(255)' , "DEFAULT NULL COMMENT 'ds worker group description'");
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drop procedure if exists add_column_safety;
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@ -14,3 +14,5 @@
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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--- add column
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ALTER TABLE t_ds_task_group alter COLUMN description type varchar(255);
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