dbc62b98ca
- getDmConversations: DISTINCT ON (partner) ORDER BY partner, created_at DESC → one row per conversation in a single indexed query instead of fetching up to 500 rows and de-duplicating in JS - add indexes on direct_messages (sender_id,created_at DESC), (receiver_id,created_at DESC), (receiver_id,read_at) — table had none, so every conversation-list load (runs per user on app launch for the badge) was a full-table scan + sort - lyra.tsx: drop the welcome-back greeting that fired on every first coach open per session regardless of protection status/language (always German, unconditional). Endpoint kept for future conditional use Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
19 lines
995 B
SQL
19 lines
995 B
SQL
-- DM-Conversation-Liste + Unread-Badge Performance.
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-- Vorher: 0 Indizes auf direct_messages → jeder Conversation-List-Load
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-- (läuft bei JEDEM User beim App-Start fürs Tab-Badge, plus Refetch nach
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-- Send/Focus/Back-Nav) war ein Full-Table-Scan + Sort. Skaliert nicht.
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--
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-- Deploy: pnpm prisma migrate deploy (auf Hetzner, via deploy-from-artifact.sh)
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-- Conversation-Liste: DISTINCT ON (partner) ORDER BY partner, created_at DESC.
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-- Ein Index pro Richtung (sender/receiver) deckt das OR-Predicate + Sort ab.
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CREATE INDEX IF NOT EXISTS "direct_messages_sender_id_created_at_idx"
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ON "rebreak"."direct_messages" ("sender_id", "created_at" DESC);
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CREATE INDEX IF NOT EXISTS "direct_messages_receiver_id_created_at_idx"
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ON "rebreak"."direct_messages" ("receiver_id", "created_at" DESC);
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-- Unread-Badge: WHERE receiver_id = $1 AND read_at IS NULL.
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CREATE INDEX IF NOT EXISTS "direct_messages_receiver_id_read_at_idx"
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ON "rebreak"."direct_messages" ("receiver_id", "read_at");
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