wangbo opened a new issue #5621: URL: https://github.com/apache/incubator-doris/issues/5621
Acoording to [db.h](https://github.com/facebook/rocksdb/blob/v5.12.4/include/rocksdb/db.h) comment KeyMayExist is lighter-weight than Get ``` // If the key definitely does not exist in the database, then this method // returns false, else true. If the caller wants to obtain value when the key // is found in memory, a bool for 'value_found' must be passed. 'value_found' // will be true on return if value has been set properly. // This check is potentially lighter-weight than invoking DB::Get(). One way // to make this lighter weight is to avoid doing any IOs. // Default implementation here returns true and sets 'value_found' to false virtual bool KeyMayExist(const ReadOptions& /*options*/, ColumnFamilyHandle* /*column_family*/, const Slice& /*key*/, std::string* /*value*/, bool* value_found = nullptr) { if (value_found != nullptr) { *value_found = false; } return true; } ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For additional commands, e-mail: commits-h...@doris.apache.org
