d90f2cf7a2
BytesToBytesMap current encodes key/value data in the following format: ``` 8B key length, key data, 8B value length, value data ``` UnsafeExternalSorter, on the other hand, encodes data this way: ``` 4B record length, data ``` As a result, we cannot pass records encoded by BytesToBytesMap directly into UnsafeExternalSorter for sorting. However, if we rearrange data slightly, we can then pass the key/value records directly into UnsafeExternalSorter: ``` 4B key+value length, 4B key length, key data, value data ``` Author: Reynold Xin <rxin@databricks.com> Closes #7845 from rxin/kvsort-rebase and squashes the following commits: 5716b59 [Reynold Xin] Fixed test. 2e62ccb [Reynold Xin] Updated BytesToBytesMap's data encoding to put the key first. a51b641 [Reynold Xin] Added a KV sorter interface. |
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java/org/apache/spark/sql | ||
scala/org/apache/spark/sql |