text: -- Creation of table for schema history versioning mechanism
      create table schema_history (
         schema_version varchar(255) not null,
          applied datetime(6) not null,
          comment varchar(8192) not null,
          primary key (schema_version)
      ) engine=InnoDB;
  
  
  -- Necessary line in order to document the change. 
  INSERT INTO schema_history (schema_version,comment,applied) VALUES ('000','Applied versioning of schema', NOW());