Files
coder/coderd/database/migrations/000545_chat_search_schema.down.sql
T
Cian Johnston f7481c5d08 feat: Add full text search over chat messages (#27126)
Closes CODAGT-721
Closes CODAGT-722
Closes CODAGT-723
Closes CODAGT-724
Closes CODAGT-725

This PR adds the database and API pieces necessary to support full-text
chat message search.

- Adds required chat schema for full-text search
- Adds dbpurge job to populate search_tsv in the background
- Adds `search` parameter to GetChats query
- Adds `search` filter to `searchquery.Chats`
- Wires chat search filter into chats API

> Implemented by Coder Agents, reviewed and tested by a human.
2026-07-16 15:21:57 +01:00

69 lines
1.9 KiB
PL/PgSQL

-- Restore the original trigger bodies from 000519.
CREATE OR REPLACE FUNCTION set_chat_message_revision_before()
RETURNS trigger AS $$
DECLARE
chat_snapshot_version bigint;
BEGIN
IF TG_OP = 'INSERT' AND NEW.revision IS NOT NULL THEN
RAISE EXCEPTION 'chat_messages.revision must be assigned by trigger';
END IF;
IF TG_OP = 'UPDATE' THEN
IF OLD.chat_id IS DISTINCT FROM NEW.chat_id THEN
RAISE EXCEPTION 'chat_messages.chat_id is immutable';
END IF;
IF OLD.revision IS DISTINCT FROM NEW.revision THEN
RAISE EXCEPTION 'chat_messages.revision must be assigned by trigger';
END IF;
IF OLD IS NOT DISTINCT FROM NEW THEN
RETURN NEW;
END IF;
END IF;
SELECT snapshot_version INTO chat_snapshot_version
FROM chats WHERE id = NEW.chat_id;
IF chat_snapshot_version IS NULL THEN
RAISE EXCEPTION 'chat % does not exist', NEW.chat_id;
END IF;
NEW.revision = chat_snapshot_version;
RETURN NEW;
END;
$$ LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION update_chat_history_after_message_update()
RETURNS trigger AS $$
BEGIN
UPDATE chats c
SET history_version = c.snapshot_version,
generation_attempt = 0
FROM (
SELECT DISTINCT n.chat_id
FROM chat_message_history_new_rows n
JOIN chat_message_history_old_rows o ON o.id = n.id
WHERE o IS DISTINCT FROM n
) AS affected
WHERE c.id = affected.chat_id
AND (
c.history_version IS DISTINCT FROM c.snapshot_version
OR c.generation_attempt <> 0
);
RETURN NULL;
END;
$$ LANGUAGE plpgsql;
DROP INDEX IF EXISTS idx_chat_diff_statuses_pr_title_fts;
DROP INDEX IF EXISTS idx_chats_title_fts;
DROP INDEX IF EXISTS idx_chat_messages_search_tsv_pending;
DROP INDEX IF EXISTS idx_chat_messages_search_tsv;
ALTER TABLE chat_messages DROP COLUMN IF EXISTS search_tsv;
DROP FUNCTION IF EXISTS chat_message_search_text(jsonb);