Application scenarios:
company Intranet data tables built after migrating to customers online, usually cannot be attached to export comments, need further pull
table field notes:

SELECT
	*
FROM
	(
		SELECT
			'comment on column ' || trim(t.TABSCHEMA) || '.' || t.TABNAME || '.' || t.COLNAME || ' is ' || '''' || t.REMARKS || '''' || ' GO' AS COMMENT
		FROM
			syscat. COLUMNS t
	)
WHERE
	COMMENT IS NOT NULL

Table annotation:

SELECT
	*
FROM
	(
		SELECT
			'comment on table ' || trim(t.tabschema) || '.' || t.tabname || ' is ' || '''' || t.REMARKS || '''' || ' GO' AS COMMENT
		FROM
			syscat. TABLES t
	)
WHERE
	COMMENT IS NOT NULL