Function hasSessionIndex

packages/core/src/query/session-queries.ts:391–399

(db: DatabaseAdapter)

 * Check whether the segment table exists and has at least one row.
 */
export function hasSessionIndex(db: DatabaseAdapter): boolean {
  if (!hasTable(db, 'segment')) return false
  try {
    const row = db.prepare('SELECT COUNT(*) as count FROM segment').get() as { count: number } | undefined
    return (row?.count ?? 0) > 0
  } catch {
    return false
  }
}

/**
 * Session index statistics: count, existence flag, and gap threshold from meta.