Instead, use an in memory hash table to cache the data and just keep a key to the data in the session.

相反地，应该使用内存中的哈希表来缓存数据，并且在会话中保存一个对此数据进行引用的键。

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For each row that satisfies the filter condition, the database server applies hash function to the key and proves the hash table to find a match.

在满足筛选器条件的每个行中，数据库服务器将对键应用哈希函数，并探测哈希表以查找匹配的键值。

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You can think of a hash table conceptually as a series of buckets, each with an address that is derived form the key value by applying the hash function.

可以在概念上将哈希表认为是一系列的 bucket，每个 bucket 所拥有的地址是通过应用哈希函数从键值导出的。

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