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You might have noticed the row estimates (599 and 28,458) are lower than you'd expect for a 50-million-row table. The planner checks the actual physical file size. Our table is only 74 pages on disk, not the 123,513 we injected. Hence the planner scales reltuples down proportionally. The absolute numbers shrink, but the ratios between them stay correct, and it's the ratios that determine plan shape. When you use pg_dump --statistics-only in practice, you're typically restoring into a database with comparable data volume, so the estimates align naturally.,更多细节参见新收录的资料
DJIが7000台の「Romo」ロボット掃除機を誤ってハッキングした男性に3万ドルを支払う予定
。关于这个话题,新收录的资料提供了深入分析
63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54,这一点在新收录的资料中也有详细论述
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