create table t_standard_doc_folder
(
	id serial not null,
	name varchar(255) not null,
	create_at timestamp with time zone not null,
	parent integer
);

comment on table t_standard_doc_folder is '标准文档文件夹';

comment on column t_standard_doc_folder.id is 'ID唯一标识';

comment on column t_standard_doc_folder.name is '文件夹名称';

comment on column t_standard_doc_folder.create_at is '文件夹创建时间';

comment on column t_standard_doc_folder.parent is '父级文件夹';

create unique index t_standard_doc_folder_id_uindex
	on t_standard_doc_folder (id);

alter table t_standard_doc_folder
	add constraint t_standard_doc_folder_pk
		primary key (id);