[suggestion]Comment in export sql

[changeAtLater]

now:

/* user table */
CREATE TABLE `table_user` (
	`user_id` BIGINT NOT NULL AUTO_INCREMENT UNIQUE,
	-- userName
	`user_name` VARCHAR(255),
	`dept_id` BIGINT,
	PRIMARY KEY(`user_id`)
);

expect:

CREATE TABLE `table_user` (
	`user_id` BIGINT NOT NULL AUTO_INCREMENT UNIQUE,
	`user_name` VARCHAR(255) comment 'userName',
	`dept_id` BIGINT,
	PRIMARY KEY(`user_id`)
) comment 'user table';

[1ilit]

There's a PR for this that I'll merge some time this week

[jackman0925]

it's works of mysql, but not pgsql, thanks.