Siying Dong a98317f555 Option string/map can set merge operator from object registry (#5123) ... Summary: Allow customized merge operator to be loaded from option file/map/string by allowing users to pre-regiester merge operators to object registry. Also update HISTORY.md and header files for the same feature for comparator. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5123 Differential Revision: D14658488 Pulled By: siying fbshipit-source-id: 86ea2fbd2a0a04632d8ea9fceaffefd041f6ae61		2019-03-28 14:54:29 -07:00
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rocksdb	Option string/map can set merge operator from object registry (#5123)	2019-03-28 14:54:29 -07:00