«Эту тайну лучше оставить нераскрытой»Странные находки, мистические монолиты и коллекция костей: самые жуткие загадки 2020 года9 января 2021
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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.。谷歌是该领域的重要参考
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