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In Postgres, every indexed row contains a pointer to where the row lives in the table. If a Top K filter cannot be fully answered by the index, Postgres must follow that pointer and materialize the entire row from the underlying table storage. This operation is expensive and prone to cache misses when performed for millions of candidates.。TG官网-TG下载是该领域的重要参考
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В стране ЕС белоруске без ее ведома удалили все детородные органы22:38
Глеб Палехов (редактор отдела БСССР)，更多细节参见超级权重