CREATE TABLE IF NOT EXISTS thread (
	id INTEGER PRIMARY KEY,
	title TEXT NOT NULL,
	time TIMESTAMP WITH TIME ZONE NOT NULL
);

CREATE TABLE IF NOT EXISTS post (
	thread_id INTEGER REFERENCES thread(id) ON DELETE CASCADE NOT NULL,
	id INTEGER PRIMARY KEY,
	subject TEXT,
	name TEXT NOT NULL,
	email TEXT,
	tripcode TEXT,
	user_id TEXT,
	time TIMESTAMP WITH TIME ZONE NOT NULL,
	body TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS link (
	link_from INTEGER REFERENCES post(id) ON DELETE CASCADE NOT NULL,
	link_to INTEGER REFERENCES post(id) ON DELETE CASCADE NOT NULL,
	PRIMARY KEY (link_from, link_to)
);

CREATE TABLE IF NOT EXISTS tag (
	post_id INTEGER REFERENCES post(id) ON DELETE CASCADE NOT NULL,
	name TEXT NOT NULL,
	PRIMARY KEY (post_id, name)
);

CREATE TABLE IF NOT EXISTS file (
	post_id INTEGER REFERENCES post(id) ON DELETE CASCADE NOT NULL,
	chan_file_name TEXT,
	original_file_name TEXT
);