text: alter table stream_definitions add column description varchar(255);
  
  alter table stream_definitions add column original_definition text;
  
  alter table task_definitions add column description varchar(255);
  
  CREATE TABLE task_execution_metadata (
    id int8 NOT NULL,
    task_execution_id int8 NOT NULL,
    task_execution_manifest TEXT,
    primary key (id),
    CONSTRAINT TASK_METADATA_FK FOREIGN KEY (TASK_EXECUTION_ID)
    REFERENCES TASK_EXECUTION(TASK_EXECUTION_ID)
  );
  
  CREATE SEQUENCE task_execution_metadata_seq MAXVALUE 9223372036854775807 NO CYCLE;
  