Andrey Zagrebin 2c7422aa65 Summary:
This PR addresses issue #3865 and implements the following approach to fix it:
 - adds `MergeContext::GetOperandsDirectionForward` and `MergeContext::GetOperandsDirectionBackward` to query merge operands in a specific order
 - `MergeContext::GetOperands` becomes a shortcut for `MergeContext::GetOperandsDirectionForward`
 - pass `MergeContext::GetOperandsDirectionBackward` to `MergeOperator::ShouldMerge` and document the order
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4266

Differential Revision: D9360750

Pulled By: sagar0

fbshipit-source-id: 20cb73ff017760b062ecdcf4382560767086e092
2018-08-21 17:57:45 -07:00
..
2018-08-11 21:47:27 -07:00
2017-10-17 08:57:09 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2017-07-26 21:11:47 -07:00
2017-07-15 16:11:23 -07:00
2018-04-13 11:27:17 -07:00
2018-07-16 17:13:10 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2018-05-03 15:43:09 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2018-04-10 15:59:24 -07:00
2017-07-15 16:11:23 -07:00
2018-07-13 10:58:06 -07:00
2018-01-29 12:56:42 -08:00
2017-07-15 16:11:23 -07:00
2018-08-21 17:57:45 -07:00
2018-08-21 17:57:45 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2018-07-13 10:58:06 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00
2017-07-15 16:11:23 -07:00