forked-synapse/synapse/storage/schema/main/delta/72/07thread_receipts.sql.postgres
Patrick Cloke 666ae87729
Update event push action and receipt tables to support threads. (#13753)
Adds a `thread_id` column to the `event_push_actions`, `event_push_actions_staging`,
and `event_push_summary` tables. This will notifications to be segmented by the thread
in a future pull request. The `thread_id` column stores the root event ID or the special
value `"main"`.

The `thread_id` column for `event_push_actions` and `event_push_summary` is
backfilled with `"main"` for all existing rows. New entries into `event_push_actions`
and `event_push_actions_staging` will get the proper thread ID.

`receipts_linearized` and `receipts_graph` also gain a `thread_id` column, which is similar,
except `NULL` is a special value meaning the receipt is "unthreaded".

See MSC3771 and MSC3773 for where this data will be useful.
2022-09-14 17:11:16 +00:00

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-- Add a nullable column for thread ID to the receipts table; this allows a
-- receipt per user, per room, as well as an unthreaded receipt (corresponding
-- to a null thread ID).
ALTER TABLE receipts_linearized ADD COLUMN thread_id TEXT;
ALTER TABLE receipts_graph ADD COLUMN thread_id TEXT;
-- Rebuild the unique constraint with the thread_id.
ALTER TABLE receipts_linearized
ADD CONSTRAINT receipts_linearized_uniqueness_thread
UNIQUE (room_id, receipt_type, user_id, thread_id);
ALTER TABLE receipts_graph
ADD CONSTRAINT receipts_graph_uniqueness_thread
UNIQUE (room_id, receipt_type, user_id, thread_id);