22f396798e
Summary: Based on previous patches, this diff eventually provides the end-to-end mechanism for users to specify the hash-index. Test Plan: Wrote several new unit tests. Reviewers: sdong, haobo, dhruba Reviewed By: sdong CC: leveldb Differential Revision: https://reviews.facebook.net/D16539 Use shorten index key for hash-index Summary: I was wrong about the "index builder", right now since we create index by scanning both whole table and index, there is not need to preserve the whole key as the index key. I switch back to original way index which is both space efficient and able to supprot in-fly construction of hash index. IN this patch, I made minimal change since I'm not sure if we still need the "pluggable index builder", under current circumstance it is of no use and kind of over-engineered. But I'm not sure if we can still exploit its usefulness in the future; otherwise I think I can just burn them with great vengeance. Test Plan: unit tests Reviewers: sdong, haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D17745 Conflicts: table/block_based_table_reader.cc table/block_based_table_reader.h |
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