signal-desktop/ts/sql/migrations/77-signal-tokenizer.ts

// Copyright 2023 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only

import type { Database } from '@signalapp/better-sqlite3';

import type { LoggerType } from '../../types/Logging';

export default function updateToSchemaVersion77(
  currentVersion: number,
  db: Database,
  logger: LoggerType
): void {
  if (currentVersion >= 77) {
    return;
  }

  db.transaction(() => {
    db.exec(
      `
      -- Create FTS table with custom tokenizer from
      -- @signalapp/better-sqlite3.

      DROP TABLE messages_fts;

      CREATE VIRTUAL TABLE messages_fts USING fts5(
        body,
        tokenize = 'signal_tokenizer'
      );

      -- Reindex messages
      -- Based on messages_on_insert trigger from migrations/45-stories.ts

      INSERT INTO messages_fts (rowid, body)
      SELECT rowid, body
      FROM messages
      WHERE isViewOnce IS NOT 1 AND storyId IS NULL;
      `
    );

    db.pragma('user_version = 77');
  })();

  logger.info('updateToSchemaVersion77: success!');
}