rocksdbjni: ReadOption#setIterateUpperBound does not support DirectSlice

[lizhanhui]

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Expected behavior

Iterator created with DirectSlice upper bound should work exactly the same way Slice bound.

Actual behavior

Iterator created with DirectSlice is invalid.

Steps to reproduce the behavior

Here is a minimal reproducible code that may verify Slice bound works while DirectSlice fails:

https://github.com/lizhanhui/rocksdb-bug-report/blob/main/src/test/java/lab/rocksdb/RocksDBTest.java

[gitlijian]

hi, @lizhanhui I think this class is implemented in Java. Is there any problem with implementing this class in Java, or are you calling it incorrectly?