package kvrpcpb

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The API version the server and the client is using. See more details in https://github.com/tikv/rfcs/blob/master/text/0069-api-v2.md.

Used in: backup.BackupMeta, backup.BackupRequest, backup.BackupResponse, debugpb.GetStoreInfoResponse, disaggregated.DisaggTaskMeta, import_sstpb.SSTMeta, CompactRequest, Context, mpp.TaskMeta, raft_serverpb.StoreIdent

• V1 = 0

  `V1` is mainly for TiDB & TxnKV, and is not safe to use RawKV along with the others. V1 server only accepts V1 requests. V1 raw requests with TTL will be rejected.

• V1TTL = 1

  `V1TTL` is only available to RawKV, and 8 bytes representing the unix timestamp in seconds for expiring time will be append to the value of all RawKV entries. For example: ------------------------------------------------------------ | User value | Expire Ts | ------------------------------------------------------------ | 0x12 0x34 0x56 | 0x00 0x00 0x00 0x00 0x00 0x00 0xff 0xff | ------------------------------------------------------------ V1TTL server only accepts V1 raw requests. V1 client should not use `V1TTL` in request. V1 client should always send `V1`.

• V2 = 2

  `V2` use new encoding for RawKV & TxnKV to support more features. Key Encoding: TiDB: start with `m` or `t`, the same as `V1`. TxnKV: prefix with `x`, encoded as `MCE( x{keyspace id} + {user key} ) + timestamp`. RawKV: prefix with `r`, encoded as `MCE( r{keyspace id} + {user key} ) + timestamp`. Where the `{keyspace id}` is fixed-length of 3 bytes in network byte order. Besides, RawKV entires must be in `default` CF. Value Encoding: TiDB & TxnKV: the same as `V1`. RawKV: `{user value} + {optional fields} + {meta flag}`. The last byte in the raw value must be meta flags. For example: -------------------------------------- | User value | Meta flags | -------------------------------------- | 0x12 0x34 0x56 | 0x00 (0b00000000) | -------------------------------------- Bit 0 of meta flags is for TTL. If set, the value contains 8 bytes expiring time as unix timestamp in seconds at the very left to the meta flags. -------------------------------------------------------------------------------- | User value | Expiring time | Meta flags | -------------------------------------------------------------------------------- | 0x12 0x34 0x56 | 0x00 0x00 0x00 0x00 0x00 0x00 0xff 0xff | 0x01 (0b00000001) | -------------------------------------------------------------------------------- Bit 1 is for deletion. If set, the entry is logical deleted. --------------------- | Meta flags | --------------------- | 0x02 (0b00000010) | --------------------- V2 server accpets V2 requests and V1 transactional requests that statrts with TiDB key prefix (`m` and `t`).

Used in: CheckTxnStatusResponse

• NoAction = 0

• TTLExpireRollback = 1

• LockNotExistRollback = 2

• MinCommitTSPushed = 3

• TTLExpirePessimisticRollback = 4

• LockNotExistDoNothing = 5

Used in: KeyError

• bytes key = 1

Used in: AssertionFailed, Mutation

• None = 0

• Exist = 1

• NotExist = 2

Used in: KeyError

• uint64 start_ts = 1

• bytes key = 2

• Assertion assertion = 3

• uint64 existing_start_ts = 4

• uint64 existing_commit_ts = 5

Used in: FlushRequest, PrewriteRequest

• Off = 0

  No assertion.

• Fast = 1

  Assertion is enabled, but not enforced when it might affect performance.

• Strict = 2

  Assertion is enabled and enforced.

Similar to a `Get` request.

Used as request type in: tikvpb.Tikv.KvBatchGet

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated bytes keys = 2

• uint64 version = 3

Used as response type in: tikvpb.Tikv.KvBatchGet

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• repeated KvPair pairs = 2

• optional ExecDetailsV2 exec_details_v2 = 4

  Time and scan details when processing the request.

• optional KeyError error = 5

  This KeyError exists when some key is locked but we cannot check locks of all keys. In this case, `pairs` should be empty and the client should redo batch get all the keys after resolving the lock.

Rollback a prewritten transaction. This will remove the preliminary data from the database, unlock locks, and leave a rollback tombstone.

Used as request type in: tikvpb.Tikv.KvBatchRollback

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• uint64 start_version = 2

  Identify the transaction to be rolled back.

• repeated bytes keys = 3

  The keys to rollback.

• bool is_txn_file = 100

  Reserved for file based transaction.

Used as response type in: tikvpb.Tikv.KvBatchRollback

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

• optional ExecDetailsV2 exec_details_v2 = 3

  Execution details about the request processing.

Used as request type in: tikvpb.Tikv.BroadcastTxnStatus

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated TxnStatus txn_status = 2

Used as response type in: tikvpb.Tikv.BroadcastTxnStatus

Used as field type in: tikvpb.BatchCommandsResponse.Response

(message has no fields)

BufferBatchGet is introduced from the pipelined DML protocol. It is similar to a BatchGet request, except that it can only read the data that has been flushed by itself.

Used as request type in: tikvpb.Tikv.KvBufferBatchGet

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated bytes keys = 2

• uint64 version = 3

Used as response type in: tikvpb.Tikv.KvBufferBatchGet

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

• repeated KvPair pairs = 3

• optional ExecDetailsV2 exec_details_v2 = 4

  Time and scan details when processing the request.

Used as request type in: tikvpb.Tikv.CheckLeader

• repeated LeaderInfo regions = 1

• uint64 ts = 2

Used as response type in: tikvpb.Tikv.CheckLeader

• repeated uint64 regions = 1

• uint64 ts = 2

Used as request type in: tikvpb.Tikv.CheckLockObserver

• optional Context context = 1

• uint64 max_ts = 2

Used as response type in: tikvpb.Tikv.CheckLockObserver

• string error = 1

• bool is_clean = 2

• repeated LockInfo locks = 3

Part of the async commit protocol, checks for locks on all supplied keys. If a lock is missing, does not have a successful status, or belongs to another transaction, TiKV will leave a rollback tombstone for that key.

Used as request type in: tikvpb.Tikv.KvCheckSecondaryLocks

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated bytes keys = 2

• uint64 start_version = 3

  Identifies the transaction we are investigating.

Used as response type in: tikvpb.Tikv.KvCheckSecondaryLocks

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

• repeated LockInfo locks = 3

  For each key in `keys` in `CheckSecondaryLocks`, there will be a lock in this list if there is a lock present and belonging to the correct transaction, nil otherwise.

• uint64 commit_ts = 4

  If any of the locks have been committed, this is the commit ts used. If no locks have been committed, it will be zero.

• optional ExecDetailsV2 exec_details_v2 = 5

  Execution details about the request processing.

CheckTxnStatusRequest checks the status of a transaction. If the transaction is rollbacked/committed, return that result. If the TTL of the transaction is exhausted, abort that transaction and inform the caller. Otherwise, returns the TTL information for the transaction. CheckTxnStatusRequest may also push forward the minCommitTS of a large transaction.

Used as request type in: tikvpb.Tikv.KvCheckTxnStatus

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes primary_key = 2

  Primary key and lock ts together to locate the primary lock of a transaction.

• uint64 lock_ts = 3

  Starting timestamp of the transaction being checked.

• uint64 caller_start_ts = 4

  The start timestamp of the transaction which this request is part of.

• uint64 current_ts = 5

  The client must specify the current time to TiKV using this timestamp. It is used to check TTL timeouts. It may be inaccurate.

• bool rollback_if_not_exist = 6

  If true, then TiKV will leave a rollback tombstone in the write CF for `primary_key`, even if that key is not locked.

• bool force_sync_commit = 7

  This field is set to true only if the transaction is known to fall back from async commit. Then, CheckTxnStatus treats the transaction as non-async-commit even if the use_async_commit field in the primary lock is true.

• bool resolving_pessimistic_lock = 8

  If the check request is used to resolve or decide the transaction status for a input pessimistic lock, the transaction status could not be decided if the primary lock is pessimistic too and it's still uncertain.

• bool verify_is_primary = 9

  Whether it's needed to check if the lock on the key (if any) is the primary lock. This is for handling some corner cases when a pessimistic transaction changes its primary (see https://github.com/pingcap/tidb/issues/42937 for details). This field is necessary because the old versions of clients cannot handle some results returned from TiKV correctly. For new versions, this field should always be set to true.

• bool is_txn_file = 100

  Reserved for file based transaction.

Used as response type in: tikvpb.Tikv.KvCheckTxnStatus

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

• uint64 lock_ttl = 3

  Three kinds of transaction status: locked: lock_ttl > 0 committed: commit_version > 0 rollbacked: lock_ttl = 0 && commit_version = 0

• uint64 commit_version = 4

• Action action = 5

  The action performed by TiKV (and why if the action is to rollback).

• optional LockInfo lock_info = 6

• optional ExecDetailsV2 exec_details_v2 = 7

  Execution details about the request processing.

Used in: RawChecksumRequest

• Crc64_Xor = 0

Cleanup a key by possibly unlocking it. From 4.0 onwards, this message is no longer used.

Used as request type in: tikvpb.Tikv.KvCleanup

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes key = 2

• uint64 start_version = 3

• uint64 current_ts = 4

  The current timestamp, used in combination with a lock's TTL to determine if the lock has expired. If `current_ts == 0`, then the key will be unlocked irrespective of its TTL.

Used as response type in: tikvpb.Tikv.KvCleanup

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

• uint64 commit_version = 3

  Set if the key is already committed.

Used in: Context, raft_cmdpb.RaftRequestHeader

• Normal = 0

  Normal is the default value.

• Low = 1

• High = 2

The second phase of writing to TiKV. If there are no errors or conflicts, then this request commits a transaction so that its data can be read by other transactions.

Used as request type in: tikvpb.Tikv.KvCommit

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• uint64 start_version = 2

  Identifies the transaction.

• repeated bytes keys = 3

  All keys in the transaction (to be committed).

• uint64 commit_version = 4

  Timestamp for the end of the transaction. Must be greater than `start_version`.

• CommitRole commit_role = 6

  commit_role indicates the current commit request is a primary commit or a secondary commit. It's value maybe `Unknown` when using a client with an old version.

• bytes primary_key = 7

  primary_key indicates the primary key of the transaction. Its value may be empty when using an old version client.

• bool is_txn_file = 100

  Reserved for file based transaction.

Used as response type in: tikvpb.Tikv.KvCommit

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

• uint64 commit_version = 3

  If the commit ts is derived from min_commit_ts, this field should be set.

• optional ExecDetailsV2 exec_details_v2 = 4

  Execution details about the request processing.

CommitRole indicates the current commit request is a primary commit or a secondary commit.

Used in: CommitRequest

• Unknown = 0

  Unknown about the current request is a primary commit or a secondary commit;

• Primary = 1

  Current request is a primary commit;

• Secondary = 2

  Current request is a secondary commit;

Used in: KeyError

• uint64 start_ts = 1

• uint64 attempted_commit_ts = 2

• bytes key = 3

• uint64 min_commit_ts = 4

Used in: KeyError

• uint64 commit_ts = 1

  The calculated commit TS.

Used in: CompactResponse

• oneof error

  • CompactErrorInvalidStartKey err_invalid_start_key = 1

  • CompactErrorPhysicalTableNotExist err_physical_table_not_exist = 2

  • CompactErrorCompactInProgress err_compact_in_progress = 3

  • CompactErrorTooManyPendingTasks err_too_many_pending_tasks = 4

Used in: CompactError

(message has no fields)

Used in: CompactError

(message has no fields)

Used in: CompactError

(message has no fields)

Used in: CompactError

(message has no fields)

Used as request type in: tikvpb.Tikv.Compact

• bytes start_key = 1

  If specified, the compaction will start from this start key. If unspecified, the compaction will start from beginning. NOTE 1: The start key should be never manually constructed. You should always use a key returned in CompactResponse. NOTE 2: the compaction range will be always restricted by physical_table_id.

• int64 physical_table_id = 2

  The physical table that will be compacted. TODO: this is information that TiKV doesn't need to know. See https://github.com/pingcap/kvproto/issues/912

• int64 logical_table_id = 3

  The logical table id of the compaction. When receiving parallel requests with the same logical table id, err_compact_in_progress will be returned. TODO: this is information that TiKV doesn't need to know. See https://github.com/pingcap/kvproto/issues/912

• APIVersion api_version = 7

  API version of the request

• uint32 keyspace_id = 8

  Keyspace of the table located in.

Used as response type in: tikvpb.Tikv.Compact

• optional CompactError error = 1

• bool has_remaining = 2

  The compaction is done incrementally. If there are more data to compact, this field will be set. The client can request to compact more data according to the `compacted_end_key`.

• bytes compacted_start_key = 3

• bytes compacted_end_key = 4

Miscellaneous metadata attached to most requests.

Used in: backup.BackupRequest, coprocessor.BatchRequest, coprocessor.Request, debugpb.FlashbackToVersionRequest, import_sstpb.ApplyRequest, import_sstpb.CompactRequest, import_sstpb.DownloadRequest, import_sstpb.DuplicateDetectRequest, import_sstpb.IngestRequest, import_sstpb.MultiIngestRequest, import_sstpb.RawWriteRequest, import_sstpb.WriteRequest, BatchGetRequest, BatchRollbackRequest, BroadcastTxnStatusRequest, BufferBatchGetRequest, CheckLockObserverRequest, CheckSecondaryLocksRequest, CheckTxnStatusRequest, CleanupRequest, CommitRequest, DeleteRangeRequest, FlashbackToVersionRequest, FlushRequest, GCRequest, GetHealthFeedbackRequest, GetLockWaitHistoryRequest, GetLockWaitInfoRequest, GetRequest, MvccGetByKeyRequest, MvccGetByStartTsRequest, PessimisticLockRequest, PessimisticRollbackRequest, PhysicalScanLockRequest, PrepareFlashbackToVersionRequest, PrewriteRequest, RawBatchDeleteRequest, RawBatchGetRequest, RawBatchPutRequest, RawBatchScanRequest, RawCASRequest, RawChecksumRequest, RawCoprocessorRequest, RawDeleteRangeRequest, RawDeleteRequest, RawGetKeyTTLRequest, RawGetRequest, RawPutRequest, RawScanRequest, ReadIndexRequest, RegisterLockObserverRequest, RemoveLockObserverRequest, ResolveLockRequest, ScanLockRequest, ScanRequest, SplitRegionRequest, TxnHeartBeatRequest, UnsafeDestroyRangeRequest

• uint64 region_id = 1

• optional metapb.RegionEpoch region_epoch = 2

• optional metapb.Peer peer = 3

• uint64 term = 5

• CommandPri priority = 6

• IsolationLevel isolation_level = 7

• bool not_fill_cache = 8

• bool sync_log = 9

• bool record_time_stat = 10

  True means execution time statistics should be recorded and returned.

• bool record_scan_stat = 11

  True means RocksDB scan statistics should be recorded and returned.

• bool replica_read = 12

• repeated uint64 resolved_locks = 13

  Read requests can ignore locks belonging to these transactions because either these transactions are rolled back or theirs commit_ts > read request's start_ts.

• uint64 max_execution_duration_ms = 14

• uint64 applied_index = 15

  After a region applies to `applied_index`, we can get a snapshot for the region even if the peer is a follower.

• uint64 task_id = 16

  A hint for TiKV to schedule tasks more fairly. Query with same task ID may share same priority and resource quota.

• bool stale_read = 17

  Not required to read the most up-to-date data, replicas with `safe_ts` >= `start_ts` can handle read request directly

• bytes resource_group_tag = 18

  Any additional serialized information about the request.

• DiskFullOpt disk_full_opt = 19

  Used to tell TiKV whether operations are allowed or not on different disk usages.

• bool is_retry_request = 20

  Indicates the request is a retry request and the same request may have been sent before.

• APIVersion api_version = 21

  API version implies the encode of the key and value.

• repeated uint64 committed_locks = 22

  Read request should read through locks belonging to these transactions because these transactions are committed and theirs commit_ts <= read request's start_ts.

• optional tracepb.TraceContext trace_context = 23

  The informantion to trace a request sent to TiKV.

• string request_source = 24

  The source of the request, will be used as the tag of the metrics reporting. This field can be set for any requests that require to report metrics with any extra labels.

• uint64 txn_source = 25

  The source of the current transaction.

• uint32 busy_threshold_ms = 27

  If `busy_threshold_ms` is given, TiKV can reject the request and return a `ServerIsBusy` error before processing if the estimated waiting duration exceeds the threshold.

• optional ResourceControlContext resource_control_context = 28

  Some information used for resource control.

• uint32 keyspace_id = 32

  The keyspace that the request is sent to. NOTE: This field is only meaningful while the api_version is V2.

• uint64 buckets_version = 33

  The buckets version that the request is sent to. NOTE: This field is only meaningful while enable buckets.

• optional SourceStmt source_stmt = 34

  It tells us where the request comes from in TiDB. If it isn't from TiDB, leave it blank. This is for tests only and thus can be safely changed/removed without affecting compatibility.

• uint64 cluster_id = 35

  The cluster id of the request

Used in: KeyError

• uint64 lock_ts = 1

• bytes lock_key = 2

• uint64 deadlock_key_hash = 3

  The hash of `deadlock_key` field.

• repeated deadlock.WaitForEntry wait_chain = 4

• bytes deadlock_key = 5

  The key that the current transaction has already acquired and blocks another transaction to form the deadlock.

Used in: KeyError

• repeated MvccDebugInfo mvcc_info = 1

Delete a range of data from TiKV.

Used as request type in: tikvpb.Tikv.KvDeleteRange

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes start_key = 2

• bytes end_key = 3

• bool notify_only = 4

  If true, the data will not be immediately deleted, but the operation will still be replicated via Raft. This is used to notify TiKV that the data will be deleted using `unsafe_destroy_range` soon.

Used as response type in: tikvpb.Tikv.KvDeleteRange

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

Operation allowed info during each TiKV storage threshold.

Used in: Context

• NotAllowedOnFull = 0

  The default value, means operations are not allowed either under almost full or already full.

• AllowedOnAlmostFull = 1

  Means operations will be allowed when disk is almost full.

• AllowedOnAlreadyFull = 2

  Means operations will be allowed when disk is already full.

Used in: coprocessor.BatchResponse, coprocessor.Response

• optional TimeDetail time_detail = 1

  Available when ctx.record_time_stat = true or meet slow query.

• optional ScanDetail scan_detail = 2

  Available when ctx.record_scan_stat = true or meet slow query.

Used in: coprocessor.Response, coprocessor.StoreBatchTaskResponse, BatchGetResponse, BatchRollbackResponse, BufferBatchGetResponse, CheckSecondaryLocksResponse, CheckTxnStatusResponse, CommitResponse, FlushResponse, GetResponse, PessimisticLockResponse, PessimisticRollbackResponse, PrewriteResponse, ResolveLockResponse, ScanLockResponse, TxnHeartBeatResponse

• optional TimeDetail time_detail = 1

  Available when ctx.record_time_stat = true or meet slow query. deprecated. Should use `time_detail_v2` instead.

• optional ScanDetailV2 scan_detail_v2 = 2

  Available when ctx.record_scan_stat = true or meet slow query.

• optional WriteDetail write_detail = 3

  Raftstore writing durations of the request. Only available for some write requests.

• optional TimeDetailV2 time_detail_v2 = 4

  Available when ctx.record_time_stat = true or meet slow query.

Used in: cdcpb.ChangeDataRequest

• Noop = 0

• ReadOldValue = 1

  ReadOldValue represents to output the previous value for delete/update operations.

Flashback the region to a specific point with the given `version`, please make sure the region is "locked" by `PrepareFlashbackToVersionRequest` first, otherwise this request will fail.

Used as request type in: tikvpb.Tikv.KvFlashbackToVersion

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• uint64 version = 2

  The TS version which the data should flashback to.

• bytes start_key = 3

• bytes end_key = 4

• uint64 start_ts = 5

  The `start_ts` and `commit_ts` which the newly written MVCC version will use. Please make sure the `start_ts` is the same one in `PrepareFlashbackToVersionRequest`.

• uint64 commit_ts = 6

Used as response type in: tikvpb.Tikv.KvFlashbackToVersion

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

Flush is introduced from the pipelined DML protocol. A Flush request writes some keys and values to TiKV, storing in LOCK and DEFAULT CF, just like a Prewrite request.

Used as request type in: tikvpb.Tikv.KvFlush

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated Mutation mutations = 2

• bytes primary_key = 3

• uint64 start_ts = 4

• uint64 min_commit_ts = 5

• uint64 generation = 6

  generation of the flush request. It is a monotonically increasing number in each transaction.

• uint64 lock_ttl = 7

• AssertionLevel assertion_level = 8

Used as response type in: tikvpb.Tikv.KvFlush

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• repeated KeyError errors = 2

• optional ExecDetailsV2 exec_details_v2 = 3

Request TiKV to garbage collect all non-current data older than `safe_point`.

Used as request type in: tikvpb.Tikv.KvGC

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• uint64 safe_point = 2

Used as response type in: tikvpb.Tikv.KvGC

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

Actively request TiKV to report health feedback information. TiKV won't omit the health feedback information when sending the `BatchCommandsResponse` that contains this response. The health feedback information won't be replied in the response, but will be attached to `BatchCommandsResponse.health_feedback` field as usual. Only works when batch RPC is enabled.

Used as request type in: tikvpb.Tikv.GetHealthFeedback

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

Used as response type in: tikvpb.Tikv.GetHealthFeedback

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

  The error field is added for keeping consistent. This request won't meet any region error as it's store level rather than region level.

• optional HealthFeedback health_feedback = 2

Used as request type in: tikvpb.Tikv.GetLockWaitHistory

• optional Context context = 1

  TODO: There may need some filter options to be used on conditional querying, e.g., finding the lock waiting status for some specified transaction.

Used as response type in: tikvpb.Tikv.GetLockWaitHistory

• optional errorpb.Error region_error = 1

• string error = 2

• repeated deadlock.WaitForEntry entries = 3

Used as request type in: tikvpb.Tikv.GetLockWaitInfo

• optional Context context = 1

  TODO: There may need some filter options to be used on conditional querying, e.g., finding the lock waiting status for some specified transaction.

Used as response type in: tikvpb.Tikv.GetLockWaitInfo

• optional errorpb.Error region_error = 1

• string error = 2

• repeated deadlock.WaitForEntry entries = 3

A transactional get command. Lookup a value for `key` in the transaction with starting timestamp = `version`.

Used as request type in: tikvpb.Tikv.KvGet

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes key = 2

• uint64 version = 3

Used as response type in: tikvpb.Tikv.KvGet

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

  A region error indicates that the request was sent to the wrong TiKV node (or other, similar errors).

• optional KeyError error = 2

  A value could not be retrieved due to the state of the database for the requested key.

• bytes value = 3

  A successful result.

• bool not_found = 4

  True if the key does not exist in the database.

• optional ExecDetailsV2 exec_details_v2 = 6

  Time and scan details when processing the request.

Used in: GetHealthFeedbackResponse, tikvpb.BatchCommandsResponse

• uint64 store_id = 1

• uint64 feedback_seq_no = 2

  The sequence number of the feedback message. It's defined as an incrementing integer, starting from the unix timestamp (milliseconds) at the time that the TiKV node is started. This can be useful for filtering out out-of-order feedback messages. Note that considering the possibility of system clock changing, this field doesn't guarantee uniqueness and monotonic if the TiKV node is restarted.

• int32 slow_score = 3

  The slow_score calculated in raftstore module. Due to some limitations of slow score, this would be replaced by `SlowTrend` in the future.

Not yet implemented.

Used as request type in: tikvpb.Tikv.KvImport

Used as field type in: tikvpb.BatchCommandsRequest.Request

• repeated Mutation mutations = 1

• uint64 commit_version = 2

Used as response type in: tikvpb.Tikv.KvImport

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

Used in: Context

• SI = 0

  SI = snapshot isolation

• RC = 1

  RC = read committed

• RCCheckTS = 2

  RC read and it's needed to check if there exists more recent versions.

Used in: backup.Error, BatchGetResponse, BatchRollbackResponse, BufferBatchGetResponse, CheckSecondaryLocksResponse, CheckTxnStatusResponse, CleanupResponse, CommitResponse, FlushResponse, GCResponse, GetResponse, KvPair, PessimisticLockResponse, PessimisticRollbackResponse, PrewriteResponse, ResolveLockResponse, ScanLockResponse, ScanResponse, SplitRegionResponse, TxnHeartBeatResponse

• optional LockInfo locked = 1

  Client should backoff or cleanup the lock then retry.

• string retryable = 2

  Client may restart the txn. e.g write conflict.

• string abort = 3

  Client should abort the txn.

• optional WriteConflict conflict = 4

  Write conflict is moved from retryable to here.

• optional AlreadyExist already_exist = 5

  Key already exists

• optional Deadlock deadlock = 6

  Deadlock is used in pessimistic transaction for single statement rollback.

• optional CommitTsExpired commit_ts_expired = 7

  Commit ts is earlier than min commit ts of a transaction.

• optional TxnNotFound txn_not_found = 8

  Txn not found when checking txn status.

• optional CommitTsTooLarge commit_ts_too_large = 9

  Calculated commit TS exceeds the limit given by the user.

• optional AssertionFailed assertion_failed = 10

  Assertion of a `Mutation` is evaluated as a failure.

• optional PrimaryMismatch primary_mismatch = 11

  CheckTxnStatus is sent to a lock that's not the primary.

• optional TxnLockNotFound txn_lock_not_found = 12

  TxnLockNotFound indicates the txn lock is not found.

• optional DebugInfo debug_info = 100

  Extra information for error debugging

Used in: backup.BackupRequest, backup.SortedSubRanges, RawBatchScanRequest, RawChecksumRequest, RawCoprocessorRequest, ReadIndexRequest, StoreSafeTSRequest, raft_cmdpb.ReadIndexRequest

• bytes start_key = 1

• bytes end_key = 2

Used in: BatchGetResponse, BufferBatchGetResponse, RawBatchGetResponse, RawBatchPutRequest, RawBatchScanResponse, RawScanResponse, ScanResponse

• optional KeyError error = 1

• bytes key = 2

• bytes value = 3

Used in: CheckLeaderRequest

• uint64 region_id = 1

• uint64 peer_id = 2

• uint64 term = 3

• optional metapb.RegionEpoch region_epoch = 4

• optional ReadState read_state = 5

Used in: coprocessor.Response, coprocessor.StoreBatchTaskResponse, disaggregated.ErrorLocked, CheckLockObserverResponse, CheckSecondaryLocksResponse, CheckTxnStatusResponse, KeyError, PhysicalScanLockResponse, PrimaryMismatch, ReadIndexResponse, ScanLockResponse, raft_cmdpb.ReadIndexResponse

• bytes primary_lock = 1

• uint64 lock_version = 2

• bytes key = 3

• uint64 lock_ttl = 4

• uint64 txn_size = 5

  How many keys this transaction involves in this region.

• Op lock_type = 6

• uint64 lock_for_update_ts = 7

• bool use_async_commit = 8

  Fields for transactions that are using Async Commit.

• uint64 min_commit_ts = 9

• repeated bytes secondaries = 10

• uint64 duration_to_last_update_ms = 11

  The time elapsed since last update of lock wait info when waiting. It's used in timeout errors. 0 means unknown or not applicable. It can be used to help the client decide whether to try resolving the lock.

• bool is_txn_file = 100

  Reserved for file based transaction.

Used in: FlushRequest, ImportRequest, PessimisticLockRequest, PrewriteRequest

• Op op = 1

• bytes key = 2

• bytes value = 3

• Assertion assertion = 4

Used in: DebugInfo

• bytes key = 1

• optional MvccInfo mvcc = 2

Used as request type in: tikvpb.Tikv.MvccGetByKey

• optional Context context = 1

• bytes key = 2

Used as response type in: tikvpb.Tikv.MvccGetByKey

• optional errorpb.Error region_error = 1

• string error = 2

• optional MvccInfo info = 3

Used as request type in: tikvpb.Tikv.MvccGetByStartTs

• optional Context context = 1

• uint64 start_ts = 2

Used as response type in: tikvpb.Tikv.MvccGetByStartTs

• optional errorpb.Error region_error = 1

• string error = 2

• bytes key = 3

• optional MvccInfo info = 4

Used in: debugpb.ScanMvccResponse, MvccDebugInfo, MvccGetByKeyResponse, MvccGetByStartTsResponse

• optional MvccLock lock = 1

• repeated MvccWrite writes = 2

• repeated MvccValue values = 3

Used in: MvccInfo

• Op type = 1

• uint64 start_ts = 2

• bytes primary = 3

• bytes short_value = 4

• uint64 ttl = 5

• uint64 for_update_ts = 6

• uint64 txn_size = 7

• bool use_async_commit = 8

• repeated bytes secondaries = 9

• repeated uint64 rollback_ts = 10

• uint64 last_change_ts = 11

• uint64 versions_to_last_change = 12

Used in: MvccInfo

• uint64 start_ts = 1

• bytes value = 2

Used in: MvccInfo

• Op type = 1

• uint64 start_ts = 2

• uint64 commit_ts = 3

• bytes short_value = 4

• bool has_overlapped_rollback = 5

• bool has_gc_fence = 6

• uint64 gc_fence = 7

• uint64 last_change_ts = 8

• uint64 versions_to_last_change = 9

Used in: LockInfo, Mutation, MvccLock, MvccWrite

• Put = 0

• Del = 1

• Lock = 2

• Rollback = 3

• Insert = 4

  insert operation has a constraint that key should not exist before.

• PessimisticLock = 5

• CheckNotExists = 6

Used in: PessimisticLockResponse

• PessimisticLockKeyResultType type = 1

• bytes value = 2

• bool existence = 3

• uint64 locked_with_conflict_ts = 4

  We allow a key be locked when there is write conflict (latest commit_ts > for_update_ts). In this case, the key is semantically locked by a newer for_update_ts. For each requested key, the field is non-zero if the key is locked with write conflict, and it equals to the commit_ts of the latest version of the specified key. The for_update_ts field of the lock that's actually written to TiKV will also be this value. At the same time, `value` and `existence` will be returned regardless to how `return_values` and `check_existence` are set.

• bool skip_resolving_lock = 11

  Hint the client that resolving lock is not needed for this lock. For `PessimisticLock` requests only.

Used in: PessimisticLockKeyResult

• LockResultNormal = 0

• LockResultLockedWithConflict = 1

• LockResultFailed = 2

Lock a set of keys to prepare to write to them.

Used as request type in: tikvpb.Tikv.KvPessimisticLock

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated Mutation mutations = 2

  In this case every `Op` of the mutations must be `PessimisticLock`.

• bytes primary_lock = 3

• uint64 start_version = 4

• uint64 lock_ttl = 5

• uint64 for_update_ts = 6

  Each locking command in a pessimistic transaction has its own timestamp. If locking fails, then the corresponding SQL statement can be retried with a later timestamp, TiDB does not need to retry the whole transaction. The name comes from the `SELECT ... FOR UPDATE` SQL statement which is a locking read. Each `SELECT ... FOR UPDATE` in a transaction will be assigned its own timestamp.

• bool is_first_lock = 7

  If the request is the first lock request, we don't need to detect deadlock.

• int64 wait_timeout = 8

  Time to wait for lock released in milliseconds when encountering locks. 0 means using default timeout in TiKV. Negative means no wait.

• bool force = 9

  If it is true, TiKV will acquire the pessimistic lock regardless of write conflict and return the latest value. It's only supported for single mutation.

• bool return_values = 10

  If it is true, TiKV will return values of the keys if no error, so TiDB can cache the values for later read in the same transaction. When 'force' is set to true, this field is ignored.

• uint64 min_commit_ts = 11

  If min_commit_ts > 0, this is large transaction proto, the final commit_ts would be infered from min_commit_ts.

• bool check_existence = 12

  If set to true, it means TiKV need to check if the key exists, and return the result in the `not_founds` feild in the response. This works no matter if `return_values` is set. If `return_values` is set, it simply makes no difference; otherwise, the `value` field of the repsonse will be empty while the `not_founds` field still indicates the keys' existence.

• bool lock_only_if_exists = 13

  TiKV lock the record only when it exists

• PessimisticLockWakeUpMode wake_up_mode = 14

  Specifies the behavior when the request is woken up after wating for lock of another transaction.

Used as response type in: tikvpb.Tikv.KvPessimisticLock

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• repeated KeyError errors = 2

• uint64 commit_ts = 3

  It carries the latest value and its commit ts if force in PessimisticLockRequest is true.

• bytes value = 4

• repeated bytes values = 5

  The values is set if 'return_values' is true in the request and no error. If 'force' is true, this field is not used. Only used when `wake_up_mode` is `WakeUpModeNormal`.

• repeated bool not_founds = 6

  Indicates whether the values at the same index is correspond to an existing key. In legacy TiKV, this field is not used even 'force' is false. In that case, an empty value indicates two possible situations: (1) the key does not exist. (2) the key exists but the value is empty. Only used when `wake_up_mode` is `WakeUpModeNormal`.

• optional ExecDetailsV2 exec_details_v2 = 7

  Execution details about the request processing.

• repeated PessimisticLockKeyResult results = 8

  Results of the request. Only used when `wake_up_mode` is `WakeUpModeForceLock`.

Used to specify the behavior when a pessimistic lock request is woken up after waiting for another lock.

Used in: PessimisticLockRequest

• WakeUpModeNormal = 0

  When woken up, returns WriteConflict error to the client and the client should retry if necessary. In this mode, results of `return_values` or `check_existence` will be set to `values` and `not_founds` fields of the PessimisticLockResponse, which is compatible with old versions.

• WakeUpModeForceLock = 1

  When woken up, continue trying to lock the key. This implicitly enables the `allow_lock_with_conflict` behavior, which means, allow acquiring the lock even if there is WriteConflict on the key. In this mode, `return_values` or `check_existence` fields of PessimisticLockResponse won't be used, and all results are carried in the `results` field.

Unlock keys locked using `PessimisticLockRequest`.

Used as request type in: tikvpb.Tikv.KVPessimisticRollback

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• uint64 start_version = 2

• uint64 for_update_ts = 3

• repeated bytes keys = 4

Used as response type in: tikvpb.Tikv.KVPessimisticRollback

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• repeated KeyError errors = 2

• optional ExecDetailsV2 exec_details_v2 = 3

  Execution details about the request processing.

Used as request type in: tikvpb.Tikv.PhysicalScanLock

• optional Context context = 1

• uint64 max_ts = 2

• bytes start_key = 3

• uint32 limit = 4

Used as response type in: tikvpb.Tikv.PhysicalScanLock

• string error = 1

• repeated LockInfo locks = 2

Preparing the flashback for a region/key range will "lock" the region so that there is no any read, write or schedule operation could be proposed before the actual flashback operation.

Used as request type in: tikvpb.Tikv.KvPrepareFlashbackToVersion

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes start_key = 2

• bytes end_key = 3

• uint64 start_ts = 4

  The `start_ts` which we will use to write a lock to prevent the `resolved_ts` from advancing during the whole process.

• uint64 version = 5

  The TS version which the data will flashback to later.

Used as response type in: tikvpb.Tikv.KvPrepareFlashbackToVersion

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

A prewrite is the first phase of writing to TiKV. It contains all data to be written in a transaction. TiKV will write the data in a preliminary state. Data cannot be read until it has been committed. The client should only commit a transaction once all prewrites succeed.

Used as request type in: tikvpb.Tikv.KvPrewrite

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated Mutation mutations = 2

  The data to be written to the database.

• bytes primary_lock = 3

  The client picks one key to be primary (unrelated to the primary key concept in SQL). This key's lock is the source of truth for the state of a transaction. All other locks due to a transaction will point to the primary lock.

• uint64 start_version = 4

  Identifies the transaction being written.

• uint64 lock_ttl = 5

• bool skip_constraint_check = 6

  TiKV can skip some checks, used for speeding up data migration.

• repeated PrewriteRequest.PessimisticAction pessimistic_actions = 7

  For pessimistic transaction, some mutations don't need to be locked, for example, non-unique index key. Keys with deferred constraint checks are not locked.

• uint64 txn_size = 8

  How many keys this transaction involves in this region.

• uint64 for_update_ts = 9

  For pessimistic transactions only; used to check if a conflict lock is already committed.

• uint64 min_commit_ts = 10

  If min_commit_ts > 0, this is a large transaction request, the final commit_ts will be inferred from `min_commit_ts`.

• bool use_async_commit = 11

  When async commit is enabled, `secondaries` should be set as the key list of all secondary locks if the request prewrites the primary lock.

• repeated bytes secondaries = 12

• bool try_one_pc = 13

  When the transaction involves only one region, it's possible to commit the transaction directly with 1PC protocol.

• uint64 max_commit_ts = 14

  The max commit ts is reserved for limiting the commit ts of 1PC or async commit, which can be used to avoid inconsistency with schema change.

• AssertionLevel assertion_level = 15

  The level of assertion to use on this prewrte request.

• repeated PrewriteRequest.ForUpdateTSConstraint for_update_ts_constraints = 16

  for_update_ts constriants that should be checked when prewriting a pessimistic transaction. See https://github.com/tikv/tikv/issues/14311

• repeated uint64 txn_file_chunks = 100

  Reserved for file based transaction.

for_update_ts constriants that should be checked when prewriting a pessimistic transaction.

Used in: PrewriteRequest

• uint32 index = 1

  The index of key in the prewrite request that should be checked.

• uint64 expected_for_update_ts = 2

  The expected for_update_ts of the pessimistic lock of the key.

What kind of checks need to be performed for keys in a pessimistic transaction.

Used in: PrewriteRequest

• SKIP_PESSIMISTIC_CHECK = 0

  The key needn't be locked and no extra write conflict checks are needed.

• DO_PESSIMISTIC_CHECK = 1

  The key should have been locked at the time of prewrite.

• DO_CONSTRAINT_CHECK = 2

  The key doesn't need a pessimistic lock. But we need to do data constraint checks.

Used as response type in: tikvpb.Tikv.KvPrewrite

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• repeated KeyError errors = 2

• uint64 min_commit_ts = 3

  0 if the min_commit_ts is not ready or any other reason that async commit cannot proceed. The client can then fallback to normal way to continue committing the transaction if prewrite are all finished.

• uint64 one_pc_commit_ts = 4

  When the transaction is successfully committed with 1PC protocol, this field will be set to the commit ts of the transaction. Otherwise, if TiKV failed to commit it with 1PC or the transaction is not 1PC, the value will be 0.

• optional ExecDetailsV2 exec_details_v2 = 5

  Execution details about the request processing.

Used in: KeyError

• optional LockInfo lock_info = 1

Used as request type in: tikvpb.Tikv.RawBatchDelete

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated bytes keys = 2

• string cf = 3

• bool for_cas = 4

Used as response type in: tikvpb.Tikv.RawBatchDelete

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

Used as request type in: tikvpb.Tikv.RawBatchGet

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated bytes keys = 2

• string cf = 3

Used as response type in: tikvpb.Tikv.RawBatchGet

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• repeated KvPair pairs = 2

Used as request type in: tikvpb.Tikv.RawBatchPut

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated KvPair pairs = 2

• string cf = 3

• uint64 ttl = 4

• bool for_cas = 5

• repeated uint64 ttls = 6

  The time-to-live for each keys in seconds, and if the length of `ttls` is exactly one, the ttl will be applied to all keys. Otherwise, the length mismatch between `ttls` and `pairs` will return an error.

Used as response type in: tikvpb.Tikv.RawBatchPut

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

Used as request type in: tikvpb.Tikv.RawBatchScan

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• repeated KeyRange ranges = 2

  scanning range

• uint32 each_limit = 3

  max number of returning kv pairs for each scanning range

• bool key_only = 4

• string cf = 5

• bool reverse = 6

Used as response type in: tikvpb.Tikv.RawBatchScan

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• repeated KvPair kvs = 2

Used as request type in: tikvpb.Tikv.RawCompareAndSwap

• optional Context context = 1

• bytes key = 2

• bytes value = 3

• bool previous_not_exist = 4

• bytes previous_value = 5

• string cf = 6

• uint64 ttl = 7

Used as response type in: tikvpb.Tikv.RawCompareAndSwap

• optional errorpb.Error region_error = 1

• string error = 2

• bool succeed = 3

• bool previous_not_exist = 4

  The previous value regardless of whether the comparison is succeed.

• bytes previous_value = 5

Used as request type in: tikvpb.Tikv.RawChecksum

• optional Context context = 1

• ChecksumAlgorithm algorithm = 2

• repeated KeyRange ranges = 3

Used as response type in: tikvpb.Tikv.RawChecksum

• optional errorpb.Error region_error = 1

• string error = 2

• uint64 checksum = 3

• uint64 total_kvs = 4

• uint64 total_bytes = 5

Used as request type in: tikvpb.Tikv.RawCoprocessor

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• string copr_name = 2

• string copr_version_req = 3

  Coprorcessor version constraint following SEMVER definition.

• repeated KeyRange ranges = 4

• bytes data = 5

Used as response type in: tikvpb.Tikv.RawCoprocessor

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

  Error message for cases like if no coprocessor with a matching name is found or on a version mismatch between plugin_api and the coprocessor.

• bytes data = 3

Used as request type in: tikvpb.Tikv.RawDeleteRange

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes start_key = 2

• bytes end_key = 3

• string cf = 4

Used as response type in: tikvpb.Tikv.RawDeleteRange

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

Used as request type in: tikvpb.Tikv.RawDelete

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes key = 2

• string cf = 3

• bool for_cas = 4

Used as response type in: tikvpb.Tikv.RawDelete

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

Used as request type in: tikvpb.Tikv.RawGetKeyTTL

• optional Context context = 1

• bytes key = 2

• string cf = 3

Used as response type in: tikvpb.Tikv.RawGetKeyTTL

• optional errorpb.Error region_error = 1

• string error = 2

• uint64 ttl = 3

• bool not_found = 4

Used as request type in: tikvpb.Tikv.RawGet

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes key = 2

• string cf = 3

Used as response type in: tikvpb.Tikv.RawGet

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

• bytes value = 3

• bool not_found = 4

Used as request type in: tikvpb.Tikv.RawPut

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes key = 2

• bytes value = 3

• string cf = 4

• uint64 ttl = 5

• bool for_cas = 6

Used as response type in: tikvpb.Tikv.RawPut

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• string error = 2

Used as request type in: tikvpb.Tikv.RawScan

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes start_key = 2

• uint32 limit = 3

• bool key_only = 4

• string cf = 5

• bool reverse = 6

• bytes end_key = 7

  For compatibility, when scanning forward, the range to scan is [start_key, end_key), where start_key < end_key; and when scanning backward, it scans [end_key, start_key) in descending order, where end_key < start_key.

Used as response type in: tikvpb.Tikv.RawScan

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• repeated KvPair kvs = 2

Sent from TiFlash to a TiKV node.

Used as request type in: tikvpb.Tikv.ReadIndex

• optional Context context = 1

• uint64 start_ts = 2

  TiKV checks the given range if there is any unapplied lock blocking the read request.

• repeated KeyRange ranges = 3

Used as response type in: tikvpb.Tikv.ReadIndex

• optional errorpb.Error region_error = 1

• uint64 read_index = 2

• optional LockInfo locked = 3

  If `locked` is set, this read request is blocked by a lock. The lock should be returned to the client.

Used in: LeaderInfo

• uint64 applied_index = 1

• uint64 safe_ts = 2

Used as request type in: tikvpb.Tikv.RegisterLockObserver

• optional Context context = 1

• uint64 max_ts = 2

Used as response type in: tikvpb.Tikv.RegisterLockObserver

• string error = 1

Used as request type in: tikvpb.Tikv.RemoveLockObserver

• optional Context context = 1

• uint64 max_ts = 2

Used as response type in: tikvpb.Tikv.RemoveLockObserver

• string error = 1

For all keys locked by the transaction identified by `start_version`, either commit or rollback the transaction and unlock the key.

Used as request type in: tikvpb.Tikv.KvResolveLock

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• uint64 start_version = 2

• uint64 commit_version = 3

  `commit_version == 0` means the transaction was rolled back. `commit_version > 0` means the transaction was committed at the given timestamp.

• repeated TxnInfo txn_infos = 4

• repeated bytes keys = 5

  Only resolve specified keys.

• bool is_txn_file = 100

  Reserved for file based transaction.

Used as response type in: tikvpb.Tikv.KvResolveLock

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

• optional ExecDetailsV2 exec_details_v2 = 3

  Execution details about the request processing.

Used in: Context

• string resource_group_name = 1

  It's used to identify which resource group the request belongs to.

• optional resource_manager.Consumption penalty = 2

  The resource consumption of the resource group that have completed at all TiKVs between the previous request to this TiKV and current request. It's used as penalty to make the local resource scheduling on one TiKV takes the gloabl resource consumption into consideration.

• uint64 override_priority = 3

  This priority would override the original priority of the resource group for the request. Used to deprioritize the runaway queries.

Only reserved for compatibility.

Used in: ExecDetails

• optional ScanInfo write = 1

• optional ScanInfo lock = 2

• optional ScanInfo data = 3

Used in: ExecDetailsV2

• uint64 processed_versions = 1

  Number of user keys scanned from the storage. It does not include deleted version or RocksDB tombstone keys. For Coprocessor requests, it includes keys that has been filtered out by Selection.

• uint64 processed_versions_size = 8

  Number of bytes of user key-value pairs scanned from the storage, i.e. total size of data returned from MVCC layer.

• uint64 total_versions = 2

  Approximate number of MVCC keys meet during scanning. It includes deleted versions, but does not include RocksDB tombstone keys. When this field is notably larger than `processed_versions`, it means there are a lot of deleted MVCC keys.

• uint64 rocksdb_delete_skipped_count = 3

  Total number of deletes and single deletes skipped over during iteration, i.e. how many RocksDB tombstones are skipped.

• uint64 rocksdb_key_skipped_count = 4

  Total number of internal keys skipped over during iteration. See https://github.com/facebook/rocksdb/blob/9f1c84ca471d8b1ad7be9f3eebfc2c7e07dfd7a7/include/rocksdb/perf_context.h#L84 for details.

• uint64 rocksdb_block_cache_hit_count = 5

  Total number of RocksDB block cache hits.

• uint64 rocksdb_block_read_count = 6

  Total number of block reads (with IO).

• uint64 rocksdb_block_read_byte = 7

  Total number of bytes from block reads.

• uint64 rocksdb_block_read_nanos = 9

  Total time used for block reads.

• uint64 get_snapshot_nanos = 10

  Time used for getting a raftstore snapshot (including proposing read index, leader confirmation and getting the RocksDB snapshot).

• uint64 read_index_propose_wait_nanos = 11

  Time used for proposing read index from read pool to store pool, equals 0 when performing lease read.

• uint64 read_index_confirm_wait_nanos = 12

  Time used for leader confirmation, equals 0 when performing lease read.

• uint64 read_pool_schedule_wait_nanos = 13

  Time used for read pool scheduling.

Used in: ScanDetail

• int64 total = 1

• int64 processed = 2

• int64 read_bytes = 3

Scan the database for locks. Used at the start of the GC process to find all old locks.

Used as request type in: tikvpb.Tikv.KvScanLock

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• uint64 max_version = 2

  Returns all locks with a start timestamp before `max_version`.

• bytes start_key = 3

  Start scanning from this key.

• uint32 limit = 4

  The maximum number of locks to return.

• bytes end_key = 5

  The exclusive upperbound for scanning.

Used as response type in: tikvpb.Tikv.KvScanLock

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

• repeated LockInfo locks = 3

  Info on all locks found by the scan.

• optional ExecDetailsV2 exec_details_v2 = 4

  Execution details about the request processing.

Scan fetches values for a range of keys; it is part of the transaction with starting timestamp = `version`.

Used as request type in: tikvpb.Tikv.KvScan

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes start_key = 2

• uint32 limit = 3

  The maximum number of results to return.

• uint64 version = 4

• bool key_only = 5

  Return only the keys found by scanning, not their values.

• bool reverse = 6

• bytes end_key = 7

  For compatibility, when scanning forward, the range to scan is [start_key, end_key), where start_key < end_key; and when scanning backward, it scans [end_key, start_key) in descending order, where end_key < start_key.

• uint32 sample_step = 8

  If sample_step > 0, skips 'sample_step - 1' number of keys after each returned key. locks are not checked.

Used as response type in: tikvpb.Tikv.KvScan

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• repeated KvPair pairs = 2

  Each KvPair may contain a key error.

• optional KeyError error = 3

  This KeyError exists when some key is locked but we cannot check locks of all keys. In this case, `pairs` should be empty and the client should redo scanning all the keys after resolving the lock.

Used in: Context

• uint64 start_ts = 1

• uint64 connection_id = 2

• uint64 stmt_id = 3

• string session_alias = 4

  session alias set by user

Sent from PD to a TiKV node.

Used as request type in: tikvpb.Tikv.SplitRegion

• optional Context context = 1

• bytes split_key = 2

• repeated bytes split_keys = 3

  when use it to do batch split, `split_key` should be empty.

• bool is_raw_kv = 4

  Once enabled, the split_key will not be encoded.

Used as response type in: tikvpb.Tikv.SplitRegion

• optional errorpb.Error region_error = 1

• optional metapb.Region left = 2

  set when there are only 2 result regions.

• optional metapb.Region right = 3

  set when there are only 2 result regions.

• repeated metapb.Region regions = 4

  include all result regions.

• repeated KeyError errors = 100

  Reserved for file based transaction.

Used as request type in: tikvpb.Tikv.GetStoreSafeTS

• optional KeyRange key_range = 1

  Get the minimal `safe_ts` from regions that overlap with the key range [`start_key`, `end_key`) An empty key range means all regions in the store

Used as response type in: tikvpb.Tikv.GetStoreSafeTS

• uint64 safe_ts = 1

Used as request type in: tikvpb.Tikv.GetTiFlashSystemTable

• string sql = 1

Used as response type in: tikvpb.Tikv.GetTiFlashSystemTable

• bytes data = 1

Used in: ExecDetails, ExecDetailsV2

• uint64 wait_wall_time_ms = 1

  Off-cpu wall time elapsed in TiKV side. Usually this includes queue waiting time and other kind of waitings in series. (Wait time in the raftstore is not included.)

• uint64 process_wall_time_ms = 2

  Off-cpu and on-cpu wall time elapsed to actually process the request payload. It does not include `wait_wall_time`. This field is very close to the CPU time in most cases. Some wait time spend in RocksDB cannot be excluded for now, like Mutex wait time, which is included in this field, so that this field is called wall time instead of CPU time.

• uint64 kv_read_wall_time_ms = 3

  KV read wall Time means the time used in key/value scan and get.

• uint64 total_rpc_wall_time_ns = 4

  Total wall clock time spent on this RPC in TiKV .

Used in: ExecDetailsV2

• uint64 wait_wall_time_ns = 1

  Off-cpu wall time elapsed in TiKV side. Usually this includes queue waiting time and other kind of waitings in series. (Wait time in the raftstore is not included.)

• uint64 process_wall_time_ns = 2

  Off-cpu and on-cpu wall time elapsed to actually process the request payload. It does not include `wait_wall_time` and `suspend_wall_time`. This field is very close to the CPU time in most cases. Some wait time spend in RocksDB cannot be excluded for now, like Mutex wait time, which is included in this field, so that this field is called wall time instead of CPU time.

• uint64 process_suspend_wall_time_ns = 3

  Cpu wall time elapsed that task is waiting in queue.

• uint64 kv_read_wall_time_ns = 4

  KV read wall Time means the time used in key/value scan and get.

• uint64 total_rpc_wall_time_ns = 5

  Total wall clock time spent on this RPC in TiKV .

• uint64 kv_grpc_process_time_ns = 6

  Time spent on the gRPC layer.

• uint64 kv_grpc_wait_time_ns = 7

  Time spent on waiting for run again in grpc pool from other executor pool.

Used to update the lock_ttl of a psessimistic and/or large transaction to prevent it from been killed.

Used as request type in: tikvpb.Tikv.KvTxnHeartBeat

Used as field type in: tikvpb.BatchCommandsRequest.Request

• optional Context context = 1

• bytes primary_lock = 2

  The key of the lock to update.

• uint64 start_version = 3

  Start timestamp of the large transaction.

• uint64 advise_lock_ttl = 4

  The new TTL the sender would like.

• uint64 min_commit_ts = 5

  Optionally update PK's min_commit_ts. Only for non-async-commmit and non-1PC transactions. If it is 0, ignore this field.

• bool is_txn_file = 100

  Reserved for file based transaction.

Used as response type in: tikvpb.Tikv.KvTxnHeartBeat

Used as field type in: tikvpb.BatchCommandsResponse.Response

• optional errorpb.Error region_error = 1

• optional KeyError error = 2

• uint64 lock_ttl = 3

  The TTL actually set on the requested lock.

• optional ExecDetailsV2 exec_details_v2 = 4

  Execution details about the request processing.

Used in: ResolveLockRequest

• uint64 txn = 1

• uint64 status = 2

• bool is_txn_file = 100

  Reserved for file based transaction.

Used in: KeyError

• bytes key = 1

Used in: KeyError

• uint64 start_ts = 1

• bytes primary_key = 2

Used in: BroadcastTxnStatusRequest

• uint64 start_ts = 1

• uint64 min_commit_ts = 2

  a non-zero min_commit_ts indicates the transaction is ongoing

• uint64 commit_ts = 3

  a non-zero commit_ts indicates the transaction is committed

• bool rolled_back = 4

• bool is_completed = 5

  The txn has unlocked all keys, implying that it can be removed from txn_status_cache.

Used as request type in: tikvpb.Tikv.UnsafeDestroyRange

• optional Context context = 1

• bytes start_key = 2

• bytes end_key = 3

Used as response type in: tikvpb.Tikv.UnsafeDestroyRange

• optional errorpb.Error region_error = 1

• string error = 2

Used in: KeyError

• uint64 start_ts = 1

• uint64 conflict_ts = 2

• bytes key = 3

• bytes primary = 4

• uint64 conflict_commit_ts = 5

• WriteConflict.Reason reason = 6

Used in: WriteConflict

• Unknown = 0

• Optimistic = 1

  in optimistic transactions.

• PessimisticRetry = 2

  a lock acquisition request waits for a lock and awakes, or meets a newer version of data, let TiDB retry.

• SelfRolledBack = 3

  the transaction itself has been rolled back when it tries to prewrite.

• RcCheckTs = 4

  RcCheckTs failure by meeting a newer version, let TiDB retry.

• LazyUniquenessCheck = 5

  write conflict found in lazy uniqueness check in pessimistic transactions.

Used in: ExecDetailsV2

• uint64 store_batch_wait_nanos = 1

  Wait duration in the store loop.

• uint64 propose_send_wait_nanos = 2

  Wait duration before sending proposal to peers.

• uint64 persist_log_nanos = 3

  Total time spent on persisting the log.

• uint64 raft_db_write_leader_wait_nanos = 4

  Wait time until the Raft log write leader begins to write.

• uint64 raft_db_sync_log_nanos = 5

  Time spent on synchronizing the Raft log to the disk.

• uint64 raft_db_write_memtable_nanos = 6

  Time spent on writing the Raft log to the Raft memtable.

• uint64 commit_log_nanos = 7

  Time waiting for peers to confirm the proposal (counting from the instant when the leader sends the proposal message).

• uint64 apply_batch_wait_nanos = 8

  Wait duration in the apply loop.

• uint64 apply_log_nanos = 9

  Total time spend to applying the log.

• uint64 apply_mutex_lock_nanos = 10

  Wait time until the KV RocksDB lock is acquired.

• uint64 apply_write_leader_wait_nanos = 11

  Wait time until becoming the KV RocksDB write leader.

• uint64 apply_write_wal_nanos = 12

  Time spent on writing the KV DB WAL to the disk.

• uint64 apply_write_memtable_nanos = 13

  Time spent on writing to the memtable of the KV RocksDB.

• uint64 latch_wait_nanos = 14

  Time spent on waiting in the latch.

• uint64 process_nanos = 15

  Processing time in the transaction layer.

• uint64 throttle_nanos = 16

  Wait time because of the scheduler flow control or quota limiter throttling.

• uint64 pessimistic_lock_wait_nanos = 17

  Wait time in the waiter manager for pessimistic locking.