signal-desktop/ts/sql/migrations/1100-optimize-mark-call-history-read-in-conversation.ts

// Copyright 2024 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only

import type { Database } from '@signalapp/sqlcipher';
import { sql } from '../util.js';

export default function updateToSchemaVersion1100(db: Database): void {
  const [query] = sql`
    -- Fix: Query went from readStatus to seenStatus but index wasn't updated
    DROP INDEX IF EXISTS messages_callHistory_readStatus;
    DROP INDEX IF EXISTS messages_callHistory_seenStatus;
    CREATE INDEX messages_callHistory_seenStatus
      ON messages (type, seenStatus)
      WHERE type IS 'call-history';

    -- Update to index created in 89: add sent_at to make it covering, and where clause to make it smaller
    DROP INDEX IF EXISTS messages_call;
    CREATE INDEX messages_call ON messages
      (type, conversationId, callId, sent_at)
      WHERE type IS 'call-history';

    -- Update to index created in 89: add callId and peerId to make it covering
    DROP INDEX IF EXISTS callsHistory_order;
    CREATE INDEX callsHistory_order ON callsHistory
      (timestamp DESC, callId, peerId);

    -- Update to index created in 89: add timestamp for querying by order and callId to make it covering
    DROP INDEX IF EXISTS callsHistory_byConversation;
    DROP INDEX IF EXISTS callsHistory_byConversation_order;
    CREATE INDEX callsHistory_byConversation_order ON callsHistory (peerId, timestamp DESC, callId);

    -- Optimize markAllCallHistoryRead
    DROP INDEX IF EXISTS messages_callHistory_markReadBefore;
    CREATE INDEX messages_callHistory_markReadBefore
      ON messages (type, seenStatus, sent_at DESC)
      WHERE type IS 'call-history';

    -- Optimize markAllCallHistoryReadInConversation
    DROP INDEX IF EXISTS messages_callHistory_markReadByConversationBefore;
    CREATE INDEX messages_callHistory_markReadByConversationBefore
      ON messages (type, conversationId, seenStatus, sent_at DESC)
      WHERE type IS 'call-history';
  `;

  db.exec(query);
}