在清单5中，我们在调用期间动态地构建了数组引用，然后在打印结果时使用OID作为散列键。

In Listing 5 we build the array reference dynamically during the call, and then use the OID as the hash key when printing out the result.

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例如，如果键是整数，该值应该作为散列码。

For example, if the key is an integer, this value might serve as the hash code.

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通过对上述两个表的连接键(pdb_id)进行散列处理来分布两个表也能确保给定pdbml文档中所有原子行均能作为本身的PDBML文档存储在相同的数据库分区中。

Distributing both tables by hashing on their join key (pdb_id) also ensures that all atom rows for a given PDBML document are stored in the same database partition as the PDBML document itself.

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