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由 Andrew Kryczka 提交于
Summary: - Introduced an include/ file dedicated to db-related debug functions to avoid making db.h more complex - Added debugging function, `GetAllKeyVersions()`, to return a listing of internal data for a range of user keys. The new `struct KeyVersion` exposes data similar to internal key without exposing any internal type. - Migrated the "ldb idump" subcommand to use this function - The API takes an inclusive-exclusive range to match behavior of "ldb idump". This will be quite annoying for users who want to query a single user key's versions :(. Closes https://github.com/facebook/rocksdb/pull/2232 Differential Revision: D4976007 Pulled By: ajkr fbshipit-source-id: cab375da53a7595d6575af2b7e3b776aa3ad793e
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