51 lines
1.7 KiB
PL/PgSQL
51 lines
1.7 KiB
PL/PgSQL
CREATE TABLE IF NOT EXISTS public.peer_usernames (
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username_lower text NOT NULL,
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peer_type text NOT NULL,
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peer_id bigint NOT NULL,
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updated_at timestamp with time zone DEFAULT now() NOT NULL,
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CONSTRAINT peer_usernames_pkey PRIMARY KEY (username_lower),
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CONSTRAINT peer_usernames_nonempty_check CHECK (username_lower <> ''),
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CONSTRAINT peer_usernames_peer_id_check CHECK (peer_id <> 0),
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CONSTRAINT peer_usernames_peer_type_check CHECK (peer_type IN ('user', 'channel'))
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);
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CREATE UNIQUE INDEX IF NOT EXISTS peer_usernames_peer_unique_idx
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ON public.peer_usernames (peer_type, peer_id);
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INSERT INTO public.peer_usernames (username_lower, peer_type, peer_id)
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SELECT lower(username), 'user', id
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FROM public.users
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WHERE username <> '';
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INSERT INTO public.peer_usernames (username_lower, peer_type, peer_id)
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SELECT lower(username), 'channel', id
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FROM public.channels
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WHERE NOT deleted AND COALESCE(username, '') <> '';
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CREATE OR REPLACE FUNCTION public.delete_user_peer_username() RETURNS trigger
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LANGUAGE plpgsql
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AS $$
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BEGIN
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DELETE FROM public.peer_usernames WHERE peer_type = 'user' AND peer_id = OLD.id;
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RETURN OLD;
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END;
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$$;
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CREATE OR REPLACE FUNCTION public.delete_channel_peer_username() RETURNS trigger
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LANGUAGE plpgsql
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AS $$
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BEGIN
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DELETE FROM public.peer_usernames WHERE peer_type = 'channel' AND peer_id = OLD.id;
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RETURN OLD;
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END;
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$$;
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CREATE TRIGGER users_delete_peer_username
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AFTER DELETE ON public.users
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FOR EACH ROW EXECUTE FUNCTION public.delete_user_peer_username();
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CREATE TRIGGER channels_delete_peer_username
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AFTER DELETE ON public.channels
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FOR EACH ROW EXECUTE FUNCTION public.delete_channel_peer_username();
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DROP TABLE IF EXISTS public.channel_usernames;
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