{"action":"created","comment":{"url":"https://api.github.com/repos/pingcap/tikv/pulls/comments/73527321","id":73527321,"diff_hunk":"@@ -240,11 +240,29 @@ pub trait Mutable: Writable {\n impl Mutable for DB {}\n impl Mutable for WriteBatch {}\n \n+// `delete_in_range` fast deletes date in range [start_key, end_key).\n+// It uses rocksdb `delete_file_in_range` first, then scans the left keys and\n+// uses WriteBatch to deletes them.\n+// Note: this function is dangerous and not guarantees consistence. If you call\n+// delete_file_in_range successfully but commit following WriteBatch failed,\n+// some keys are really deleted and can't be recovered.\n+pub fn delete_in_range(db: &DB, wb: &WriteBatch, start_key: &[u8], end_key: &[u8]) -> Result<()> 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`WriteBatch` here necessary?","created_at":"2016-08-04T14:03:19Z","updated_at":"2016-08-04T14:03:19Z","html_url":"https://github.com/pingcap/tikv/pull/911#discussion_r73527321","pull_request_url":"https://api.github.com/repos/pingcap/tikv/pulls/911","_links":{"self":{"href":"https://api.github.com/repos/pingcap/tikv/pulls/comments/73527321"},"html":{"href":"https://github.com/pingcap/tikv/pull/911#discussion_r73527321"},"pull_request":{"href":"https://api.github.com/repos/pingcap/tikv/pulls/911"}}},"pull_request":{"url":"https://api.github.com/repos/pingcap/tikv/pulls/911","id":80082270,"html_url":"https://github.com/pingcap/tikv/pull/911","diff_url":"https://github.com/pingcap/tikv/pull/911.diff","patch_url":"https://github.com/pingcap/tikv/pull/911.patch","issue_url":"https://api.github.com/repos/pingcap/tikv/issues/911","number":911,"state":"open","locked":false,"title":"store: use delete_file_in_range to destroy 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