68 lines
2.8 KiB
PL/PgSQL
68 lines
2.8 KiB
PL/PgSQL
-- 20260901000017 initially ordered version keys lexically, placing
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-- channel_active_memberships before the member/dialog keys. Ordinary single-row
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-- membership writes acquire those keys in the opposite order, so a concurrent
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-- createChannel and batch invite could deadlock. Use the canonical physical
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-- mutation order: participants -> member -> dialog -> owner -> active index.
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CREATE OR REPLACE FUNCTION public.telesrv_bump_channel_membership_read_models(
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p_channel_id bigint,
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p_user_ids bigint[]
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)
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RETURNS void
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LANGUAGE plpgsql
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AS $$
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DECLARE
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changed record;
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BEGIN
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IF COALESCE(p_channel_id, 0) <= 0 OR COALESCE(cardinality(p_user_ids), 0) = 0 THEN
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RETURN;
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END IF;
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FOR changed IN
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WITH requested AS MATERIALIZED (
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SELECT DISTINCT user_id
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FROM unnest(p_user_ids) AS input(user_id)
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WHERE user_id > 0
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), keys AS MATERIALIZED (
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SELECT 10 AS priority, 'channel_participants'::text AS model, 0::bigint AS owner_user_id,
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'channel'::text AS peer_type, p_channel_id AS peer_id
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UNION
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SELECT 20, 'channel_member', user_id, 'channel', p_channel_id FROM requested
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UNION
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SELECT 30, 'dialog_light', user_id, 'channel', p_channel_id FROM requested
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UNION
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SELECT 40, 'dialog_owner', user_id, 'user', user_id FROM requested
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UNION
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SELECT 50, 'channel_active_memberships', user_id, 'user', user_id FROM requested
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), bumped AS (
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INSERT INTO public.read_model_versions (
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model, owner_user_id, peer_type, peer_id, version, hash, updated_at
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)
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SELECT model, owner_user_id, peer_type, peer_id, 1,
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public.telesrv_random_read_model_hash(), now()
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FROM keys
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ORDER BY priority, owner_user_id, peer_type, peer_id
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ON CONFLICT (model, owner_user_id, peer_type, peer_id) DO UPDATE SET
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version = public.read_model_versions.version + 1,
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hash = public.telesrv_random_read_model_hash(),
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updated_at = EXCLUDED.updated_at
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RETURNING model, owner_user_id, peer_type, peer_id, version, hash
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)
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SELECT model, owner_user_id, peer_type, peer_id, version, hash
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FROM bumped
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ORDER BY model, owner_user_id, peer_type, peer_id
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LOOP
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PERFORM pg_notify(
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'telesrv_read_model_changed',
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json_build_object(
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'model', changed.model,
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'owner_user_id', changed.owner_user_id,
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'peer_type', changed.peer_type,
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'peer_id', changed.peer_id,
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'version', changed.version,
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'hash', changed.hash
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)::text
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);
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END LOOP;
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END;
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$$;
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