transaction

package
v2.0.6 Latest Latest
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 Go to latest Published: Mar 2, 2023 License: Apache-2.0 Imports: 41 Imported by: 30

Documentation

Index

Constants

View Source 
const CommitSecondaryMaxBackoff = 41000

CommitSecondaryMaxBackoff is max sleep time of the 'commit' command

View Source 
const MaxTxnTimeUse = 24 * 60 * 60 * 1000

MaxTxnTimeUse is the max time a Txn may use (in ms) from its begin to commit. We use it to abort the transaction to guarantee GC worker will not influence it.

View Source 
const (

	// TsoMaxBackoff is the max sleep time to get tso.
	TsoMaxBackoff = 15000
)

Variables

View Source 
var (
	// PrewriteMaxBackoff is max sleep time of the `pre-write` command.
	PrewriteMaxBackoff = atomicutil.NewUint64(40000)
	// CommitMaxBackoff is max sleep time of the 'commit' command
	CommitMaxBackoff = uint64(40000)
)
View Source 
var (
	ManagedLockTTL uint64 = 20000 // 20s
)

Global variable set by config file.

View Source 
var SetSuccess = *atomicutil.NewBool(false)

SetSuccess is used to probe if kv variables are set or not. It is ONLY used in test cases.

Functions

func SendTxnHeartBeat 

func SendTxnHeartBeat(bo *retry.Backoffer, store kvstore, primary []byte, startTS, ttl uint64) (newTTL uint64, stopHeartBeat bool, err error)

SendTxnHeartBeat renews a txn's ttl.

Types

type BatchBufferGetter 

type BatchBufferGetter interface {
	Len() int
	unionstore.Getter
}

BatchBufferGetter is the interface for BatchGet.

type BatchGetter 

type BatchGetter interface {
	// BatchGet gets a batch of values.
	BatchGet(ctx context.Context, keys [][]byte) (map[string][]byte, error)
}

BatchGetter is the interface for BatchGet.

type BinlogExecutor 

type BinlogExecutor interface {
	Prewrite(ctx context.Context, primary []byte) <-chan BinlogWriteResult
	Commit(ctx context.Context, commitTS int64)
	Skip()
}

BinlogExecutor defines the logic to replicate binlogs during transaction commit.

type BinlogWriteResult 

type BinlogWriteResult interface {
	Skipped() bool
	GetError() error
}

BinlogWriteResult defines the result of prewrite binlog.

type BufferBatchGetter 

type BufferBatchGetter struct {
	// contains filtered or unexported fields
}

BufferBatchGetter is the type for BatchGet with MemBuffer.

func NewBufferBatchGetter 

func NewBufferBatchGetter(buffer BatchBufferGetter, snapshot BatchGetter) *BufferBatchGetter

NewBufferBatchGetter creates a new BufferBatchGetter.

func (*BufferBatchGetter) BatchGet 

func (b *BufferBatchGetter) BatchGet(ctx context.Context, keys [][]byte) (map[string][]byte, error)

BatchGet gets a batch of values.

type CommitterMutationFlags 

type CommitterMutationFlags uint8

CommitterMutationFlags represents various bit flags of mutations. 

const (
	// MutationFlagIsPessimisticLock is the flag that marks a mutation needs to be pessimistic-locked.
	MutationFlagIsPessimisticLock CommitterMutationFlags = 1 << iota

	// MutationFlagIsAssertExists is the flag that marks a mutation needs to be asserted to be existed when prewriting.
	MutationFlagIsAssertExists

	// MutationFlagIsAssertNotExists is the flag that marks a mutation needs to be asserted to be not-existed when prewriting.
	MutationFlagIsAssertNotExists

	// MutationFlagNeedConstraintCheckInPrewrite is the flag that marks a mutation needs to be checked for conflicts in prewrite.
	MutationFlagNeedConstraintCheckInPrewrite
)

type CommitterMutations 

type CommitterMutations interface {
	Len() int
	GetKey(i int) []byte
	GetKeys() [][]byte
	GetOp(i int) kvrpcpb.Op
	GetValue(i int) []byte
	IsPessimisticLock(i int) bool
	Slice(from, to int) CommitterMutations
	IsAssertExists(i int) bool
	IsAssertNotExist(i int) bool
	NeedConstraintCheckInPrewrite(i int) bool
}

CommitterMutations contains the mutations to be submitted.

type CommitterProbe 

type CommitterProbe struct {
	// contains filtered or unexported fields
}

CommitterProbe wraps a 2PC committer and exports internal states for testing purpose.

func (CommitterProbe) BuildPrewriteRequest 

func (c CommitterProbe) BuildPrewriteRequest(regionID, regionConf, regionVersion uint64, mutations CommitterMutations, txnSize uint64) *tikvrpc.Request

BuildPrewriteRequest builds rpc request for mutation.

func (CommitterProbe) CheckAsyncCommit 

func (c CommitterProbe) CheckAsyncCommit() bool

CheckAsyncCommit returns if async commit is available.

func (CommitterProbe) Cleanup 

func (c CommitterProbe) Cleanup(ctx context.Context)

Cleanup cleans dirty data of a committer.

func (CommitterProbe) CleanupMutations 

func (c CommitterProbe) CleanupMutations(ctx context.Context) error

CleanupMutations performs the clean up phase.

func (CommitterProbe) CloseTTLManager 

func (c CommitterProbe) CloseTTLManager()

CloseTTLManager closes the TTL manager.

func (CommitterProbe) CommitMutations 

func (c CommitterProbe) CommitMutations(ctx context.Context) error

CommitMutations performs the second phase of commit.

func (CommitterProbe) Execute 

func (c CommitterProbe) Execute(ctx context.Context) error

Execute runs the commit process.

func (CommitterProbe) GetCommitTS 

func (c CommitterProbe) GetCommitTS() uint64

GetCommitTS returns the commit ts of the committer.

func (CommitterProbe) GetForUpdateTS 

func (c CommitterProbe) GetForUpdateTS() uint64

GetForUpdateTS returns the pessimistic ForUpdate ts.

func (CommitterProbe) GetLockTTL 

func (c CommitterProbe) GetLockTTL() uint64

GetLockTTL returns the lock ttl duration of the transaction.

func (CommitterProbe) GetMinCommitTS 

func (c CommitterProbe) GetMinCommitTS() uint64

GetMinCommitTS returns the minimal commit ts can be used.

func (CommitterProbe) GetMutations 

func (c CommitterProbe) GetMutations() CommitterMutations

GetMutations returns the mutation buffer to commit.

func (CommitterProbe) GetOnePCCommitTS 

func (c CommitterProbe) GetOnePCCommitTS() uint64

GetOnePCCommitTS returns the commit ts of one pc.

func (CommitterProbe) GetPrimaryKey 

func (c CommitterProbe) GetPrimaryKey() []byte

GetPrimaryKey returns primary key of the committer.

func (CommitterProbe) GetStartTS 

func (c CommitterProbe) GetStartTS() uint64

GetStartTS returns the start ts of the transaction.

func (CommitterProbe) GetUndeterminedErr 

func (c CommitterProbe) GetUndeterminedErr() error

GetUndeterminedErr returns the encountered undetermined error (if any).

func (CommitterProbe) InitKeysAndMutations 

func (c CommitterProbe) InitKeysAndMutations() error

InitKeysAndMutations prepares the committer for commit.

func (CommitterProbe) IsAsyncCommit 

func (c CommitterProbe) IsAsyncCommit() bool

IsAsyncCommit returns if the committer uses async commit.

func (CommitterProbe) IsOnePC 

func (c CommitterProbe) IsOnePC() bool

IsOnePC returns if the committer is using one PC.

func (CommitterProbe) IsTTLRunning 

func (c CommitterProbe) IsTTLRunning() bool

IsTTLRunning returns if the TTL manager is running state.

func (CommitterProbe) IsTTLUninitialized 

func (c CommitterProbe) IsTTLUninitialized() bool

IsTTLUninitialized returns if the TTL manager is uninitialized.

func (CommitterProbe) MutationsOfKeys 

func (c CommitterProbe) MutationsOfKeys(keys [][]byte) CommitterMutations

MutationsOfKeys returns mutations match the keys.

func (CommitterProbe) PessimisticRollbackMutations 

func (c CommitterProbe) PessimisticRollbackMutations(ctx context.Context, muts CommitterMutations) error

PessimisticRollbackMutations rolls mutations back.

func (CommitterProbe) PrewriteAllMutations 

func (c CommitterProbe) PrewriteAllMutations(ctx context.Context) error

PrewriteAllMutations performs the first phase of commit.

func (CommitterProbe) PrewriteMutations 

func (c CommitterProbe) PrewriteMutations(ctx context.Context, mutations CommitterMutations) error

PrewriteMutations performs the first phase of commit for given keys.

func (CommitterProbe) SetCommitTS 

func (c CommitterProbe) SetCommitTS(ts uint64)

SetCommitTS resets the committer's commit ts.

func (CommitterProbe) SetDiskFullOpt 

func (c CommitterProbe) SetDiskFullOpt(level kvrpcpb.DiskFullOpt)

func (CommitterProbe) SetForUpdateTS 

func (c CommitterProbe) SetForUpdateTS(ts uint64)

SetForUpdateTS sets pessimistic ForUpdate ts.

func (CommitterProbe) SetLockTTL 

func (c CommitterProbe) SetLockTTL(ttl uint64)

SetLockTTL sets the lock ttl duration.

func (CommitterProbe) SetLockTTLByTimeAndSize 

func (c CommitterProbe) SetLockTTLByTimeAndSize(start time.Time, size int)

SetLockTTLByTimeAndSize sets the lock ttl duration by time and size.

func (CommitterProbe) SetMaxCommitTS 

func (c CommitterProbe) SetMaxCommitTS(ts uint64)

SetMaxCommitTS sets the max commit ts can be used.

func (CommitterProbe) SetMinCommitTS 

func (c CommitterProbe) SetMinCommitTS(ts uint64)

SetMinCommitTS sets the minimal commit ts can be used.

func (CommitterProbe) SetMutations 

func (c CommitterProbe) SetMutations(muts CommitterMutations)

SetMutations replace the mutation buffer.

func (CommitterProbe) SetNoFallBack 

func (c CommitterProbe) SetNoFallBack()

SetNoFallBack disallows async commit to fall back to normal mode.

func (CommitterProbe) SetPrimaryKey 

func (c CommitterProbe) SetPrimaryKey(key []byte)

SetPrimaryKey resets the committer's commit ts.

func (CommitterProbe) SetPrimaryKeyBlocker 

func (c CommitterProbe) SetPrimaryKeyBlocker(ac, bk chan struct{})

SetPrimaryKeyBlocker is used to block committer after primary is sent.

func (CommitterProbe) SetSessionID 

func (c CommitterProbe) SetSessionID(id uint64)

SetSessionID sets the session id of the committer.

func (CommitterProbe) SetTxnSize 

func (c CommitterProbe) SetTxnSize(sz int)

SetTxnSize resets the txn size of the committer and updates lock TTL.

func (CommitterProbe) SetTxnSource added in v2.0.3 

func (c CommitterProbe) SetTxnSource(txnSource uint64)

func (CommitterProbe) SetUseAsyncCommit 

func (c CommitterProbe) SetUseAsyncCommit()

SetUseAsyncCommit enables async commit feature.

func (CommitterProbe) WaitCleanup 

func (c CommitterProbe) WaitCleanup()

WaitCleanup waits for the committer to complete.

type ConfigProbe 

type ConfigProbe struct{}

ConfigProbe exposes configurations and global variables for testing purpose.

func (ConfigProbe) GetDefaultLockTTL 

func (c ConfigProbe) GetDefaultLockTTL() uint64

GetDefaultLockTTL returns the default lock TTL.

func (ConfigProbe) GetPessimisticLockMaxBackoff 

func (c ConfigProbe) GetPessimisticLockMaxBackoff() int

GetPessimisticLockMaxBackoff returns pessimisticLockMaxBackoff

func (ConfigProbe) GetTTLFactor 

func (c ConfigProbe) GetTTLFactor() int

GetTTLFactor returns the factor to calculate txn TTL.

func (ConfigProbe) GetTxnCommitBatchSize 

func (c ConfigProbe) GetTxnCommitBatchSize() uint64

GetTxnCommitBatchSize returns the batch size to commit txn.

func (ConfigProbe) LoadPreSplitDetectThreshold 

func (c ConfigProbe) LoadPreSplitDetectThreshold() uint32

LoadPreSplitDetectThreshold returns presplit detect threshold config.

func (ConfigProbe) LoadPreSplitSizeThreshold 

func (c ConfigProbe) LoadPreSplitSizeThreshold() uint32

LoadPreSplitSizeThreshold returns presplit size threshold config.

func (ConfigProbe) StorePreSplitDetectThreshold 

func (c ConfigProbe) StorePreSplitDetectThreshold(v uint32)

StorePreSplitDetectThreshold updates presplit detect threshold config.

func (ConfigProbe) StorePreSplitSizeThreshold 

func (c ConfigProbe) StorePreSplitSizeThreshold(v uint32)

StorePreSplitSizeThreshold updates presplit size threshold config.

type KVFilter 

type KVFilter interface {
	// IsUnnecessaryKeyValue returns whether this KV pair should be committed.
	IsUnnecessaryKeyValue(key, value []byte, flags kv.KeyFlags) (bool, error)
}

KVFilter is a filter that filters out unnecessary KV pairs.

type KVTxn 

type KVTxn struct {
	*util.RequestSource
	// contains filtered or unexported fields
}

KVTxn contains methods to interact with a TiKV transaction.

func NewTiKVTxn 

func NewTiKVTxn(store kvstore, snapshot *txnsnapshot.KVSnapshot, startTS uint64, options *TxnOptions) (*KVTxn, error)

NewTiKVTxn creates a new KVTxn.

func (*KVTxn) AddRPCInterceptor 

func (txn *KVTxn) AddRPCInterceptor(it interceptor.RPCInterceptor)

AddRPCInterceptor adds an interceptor, the order of addition is the order of execution.

func (*KVTxn) BatchGet 

func (txn *KVTxn) BatchGet(ctx context.Context, keys [][]byte) (map[string][]byte, error)

BatchGet gets kv from the memory buffer of statement and transaction, and the kv storage. Do not use len(value) == 0 or value == nil to represent non-exist. If a key doesn't exist, there shouldn't be any corresponding entry in the result map.

func (*KVTxn) CancelAggressiveLocking added in v2.0.3 

func (txn *KVTxn) CancelAggressiveLocking(ctx context.Context)

CancelAggressiveLocking cancels the current aggressive locking state. All pessimistic locks that were acquired during the aggressive locking state will be rolled back by PessimisticRollback.

func (*KVTxn) ClearDiskFullOpt 

func (txn *KVTxn) ClearDiskFullOpt()

ClearDiskFullOpt clears the options of current operation in each tikv disk usage level.

func (*KVTxn) Commit 

func (txn *KVTxn) Commit(ctx context.Context) error

Commit commits the transaction operations to KV store.

func (*KVTxn) Delete 

func (txn *KVTxn) Delete(k []byte) error

Delete removes the entry for key k from kv store.

func (*KVTxn) DoneAggressiveLocking added in v2.0.3 

func (txn *KVTxn) DoneAggressiveLocking(ctx context.Context)

DoneAggressiveLocking finishes the current aggressive locking. The locked keys will be moved to the membuffer as if these keys are locked in nomral way. If there's any unneeded locks, they will be released.

func (*KVTxn) EnableForceSyncLog 

func (txn *KVTxn) EnableForceSyncLog()

EnableForceSyncLog indicates tikv to always sync log for the transaction.

func (*KVTxn) Get 

func (txn *KVTxn) Get(ctx context.Context, k []byte) ([]byte, error)

Get implements transaction interface.

func (*KVTxn) GetClusterID 

func (txn *KVTxn) GetClusterID() uint64

GetClusterID returns store's cluster id.

func (*KVTxn) GetDiskFullOpt 

func (txn *KVTxn) GetDiskFullOpt() kvrpcpb.DiskFullOpt

GetDiskFullOpt gets the options of current operation in each TiKV disk usage level.

func (*KVTxn) GetMemBuffer 

func (txn *KVTxn) GetMemBuffer() *unionstore.MemDB

GetMemBuffer return the MemBuffer binding to this transaction.

func (*KVTxn) GetScope 

func (txn *KVTxn) GetScope() string

GetScope returns the geographical scope of the transaction.

func (*KVTxn) GetSnapshot 

func (txn *KVTxn) GetSnapshot() *txnsnapshot.KVSnapshot

GetSnapshot returns the Snapshot binding to this transaction.

func (*KVTxn) GetUnionStore 

func (txn *KVTxn) GetUnionStore() *unionstore.KVUnionStore

GetUnionStore returns the UnionStore binding to this transaction.

func (*KVTxn) GetVars 

func (txn *KVTxn) GetVars() *tikv.Variables

GetVars gets variables from the transaction.

func (*KVTxn) IsCasualConsistency 

func (txn *KVTxn) IsCasualConsistency() bool

IsCasualConsistency returns if the transaction allows linearizability inconsistency.

func (*KVTxn) IsInAggressiveLockingMode added in v2.0.3 

func (txn *KVTxn) IsInAggressiveLockingMode() bool

IsInAggressiveLockingMode checks if the transaction is currently in aggressive locking mode.

func (*KVTxn) IsInAggressiveLockingStage added in v2.0.3 

func (txn *KVTxn) IsInAggressiveLockingStage(key []byte) bool

IsInAggressiveLockingStage checks if a key is locked during the current aggressive locking stage.

func (*KVTxn) IsPessimistic 

func (txn *KVTxn) IsPessimistic() bool

IsPessimistic returns true if it is pessimistic.

func (*KVTxn) IsReadOnly 

func (txn *KVTxn) IsReadOnly() bool

IsReadOnly checks if the transaction has only performed read operations.

func (*KVTxn) Iter 

func (txn *KVTxn) Iter(k []byte, upperBound []byte) (unionstore.Iterator, error)

Iter creates an Iterator positioned on the first entry that k <= entry's key. If such entry is not found, it returns an invalid Iterator with no error. It yields only keys that < upperBound. If upperBound is nil, it means the upperBound is unbounded. The Iterator must be Closed after use.

func (*KVTxn) IterReverse 

func (txn *KVTxn) IterReverse(k []byte) (unionstore.Iterator, error)

IterReverse creates a reversed Iterator positioned on the first entry which key is less than k.

func (*KVTxn) Len 

func (txn *KVTxn) Len() int

Len returns the number of entries in the DB.

func (*KVTxn) LockKeys 

func (txn *KVTxn) LockKeys(ctx context.Context, lockCtx *tikv.LockCtx, keysInput ...[]byte) error

LockKeys tries to lock the entries with the keys in KV store. lockCtx is the context for lock, lockCtx.lockWaitTime in ms

func (*KVTxn) LockKeysFunc added in v2.0.4 

func (txn *KVTxn) LockKeysFunc(ctx context.Context, lockCtx *tikv.LockCtx, fn func(), keysInput ...[]byte) error

LockKeysFunc tries to lock the entries with the keys in KV store. lockCtx is the context for lock, lockCtx.lockWaitTime in ms fn is a function which run before the lock is released.

func (*KVTxn) LockKeysWithWaitTime 

func (txn *KVTxn) LockKeysWithWaitTime(ctx context.Context, lockWaitTime int64, keysInput ...[]byte) (err error)

LockKeysWithWaitTime tries to lock the entries with the keys in KV store. lockWaitTime in ms, 0 means nowait lock.

func (*KVTxn) Mem added in v2.0.2 

func (txn *KVTxn) Mem() uint64

Mem returns the current memory footprint

func (*KVTxn) Reset 

func (txn *KVTxn) Reset()

Reset reset the Transaction to initial states.

func (*KVTxn) RetryAggressiveLocking added in v2.0.3 

func (txn *KVTxn) RetryAggressiveLocking(ctx context.Context)

RetryAggressiveLocking tells the transaction that the current statement will be retried (ends the current attempt and starts the next attempt). If some keys are already locked during the aggressive locking, after calling this function, these locks will then be regarded as being acquired in the previous attempt. If some locks is acquired in the previous attempt but not needed in the current attempt, after calling this function, these locks will then be released.

func (*KVTxn) Rollback 

func (txn *KVTxn) Rollback() error

Rollback undoes the transaction operations to KV store.

func (*KVTxn) Set 

func (txn *KVTxn) Set(k []byte, v []byte) error

Set sets the value for key k as v into kv store. v must NOT be nil or empty, otherwise it returns ErrCannotSetNilValue.

func (*KVTxn) SetAssertionLevel 

func (txn *KVTxn) SetAssertionLevel(assertionLevel kvrpcpb.AssertionLevel)

SetAssertionLevel sets how strict the assertions in the transaction should be.

func (*KVTxn) SetBinlogExecutor 

func (txn *KVTxn) SetBinlogExecutor(binlog BinlogExecutor)

SetBinlogExecutor sets the method to perform binlong synchronization.

func (*KVTxn) SetCausalConsistency 

func (txn *KVTxn) SetCausalConsistency(b bool)

SetCausalConsistency indicates if the transaction does not need to guarantee linearizability. Default value is false which means linearizability is guaranteed.

func (*KVTxn) SetCommitCallback 

func (txn *KVTxn) SetCommitCallback(f func(string, error))

SetCommitCallback sets up a function that will be called when the transaction is finished.

func (*KVTxn) SetCommitTSUpperBoundCheck 

func (txn *KVTxn) SetCommitTSUpperBoundCheck(f func(commitTS uint64) bool)

SetCommitTSUpperBoundCheck provide a way to restrict the commit TS upper bound. The 2PC processing will pass the commitTS for the checker function, if the function returns false, the 2PC processing will abort.

func (*KVTxn) SetDiskFullOpt 

func (txn *KVTxn) SetDiskFullOpt(level kvrpcpb.DiskFullOpt)

SetDiskFullOpt sets whether current operation is allowed in each TiKV disk usage level.

func (*KVTxn) SetEnable1PC 

func (txn *KVTxn) SetEnable1PC(b bool)

SetEnable1PC indicates that the transaction will try to use 1 phase commit(which should be faster). 1PC does not work if the keys to update in the current txn are in multiple regions.

func (*KVTxn) SetEnableAsyncCommit 

func (txn *KVTxn) SetEnableAsyncCommit(b bool)

SetEnableAsyncCommit indicates if the transaction will try to use async commit.

func (*KVTxn) SetKVFilter 

func (txn *KVTxn) SetKVFilter(filter KVFilter)

SetKVFilter sets the filter to ignore key-values in memory buffer.

func (*KVTxn) SetMemoryFootprintChangeHook added in v2.0.2 

func (txn *KVTxn) SetMemoryFootprintChangeHook(hook func(uint64))

SetMemoryFootprintChangeHook sets the hook function that is triggered when memdb grows

func (*KVTxn) SetPessimistic 

func (txn *KVTxn) SetPessimistic(b bool)

SetPessimistic indicates if the transaction should use pessimictic lock.

func (*KVTxn) SetPriority 

func (txn *KVTxn) SetPriority(pri txnutil.Priority)

SetPriority sets the priority for both write and read.

func (*KVTxn) SetRPCInterceptor 

func (txn *KVTxn) SetRPCInterceptor(it interceptor.RPCInterceptor)

SetRPCInterceptor sets interceptor.RPCInterceptor for the transaction and its related snapshot. interceptor.RPCInterceptor will be executed before each RPC request is initiated. Note that SetRPCInterceptor will replace the previously set interceptor.

func (*KVTxn) SetRequestSourceInternal added in v2.0.2 

func (txn *KVTxn) SetRequestSourceInternal(internal bool)

SetRequestSourceInternal sets the scope of the request source.

func (*KVTxn) SetRequestSourceType added in v2.0.2 

func (txn *KVTxn) SetRequestSourceType(tp string)

SetRequestSourceType sets the type of the request source.

func (*KVTxn) SetResourceGroupName added in v2.0.5 

func (txn *KVTxn) SetResourceGroupName(name string)

SetResourceGroupName set resource group name for both read and write.

func (*KVTxn) SetResourceGroupTag 

func (txn *KVTxn) SetResourceGroupTag(tag []byte)

SetResourceGroupTag sets the resource tag for both write and read.

func (*KVTxn) SetResourceGroupTagger 

func (txn *KVTxn) SetResourceGroupTagger(tagger tikvrpc.ResourceGroupTagger)

SetResourceGroupTagger sets the resource tagger for both write and read. Before sending the request, if resourceGroupTag is not nil, use resourceGroupTag directly, otherwise use resourceGroupTagger.

func (*KVTxn) SetSchemaLeaseChecker 

func (txn *KVTxn) SetSchemaLeaseChecker(checker SchemaLeaseChecker)

SetSchemaLeaseChecker sets a hook to check schema version.

func (*KVTxn) SetSchemaVer 

func (txn *KVTxn) SetSchemaVer(schemaVer SchemaVer)

SetSchemaVer updates schema version to validate transaction.

func (*KVTxn) SetScope 

func (txn *KVTxn) SetScope(scope string)

SetScope sets the geographical scope of the transaction.

func (*KVTxn) SetTxnSource added in v2.0.3 

func (txn *KVTxn) SetTxnSource(txnSource uint64)

SetTxnSource sets the source of the transaction.

func (*KVTxn) SetVars 

func (txn *KVTxn) SetVars(vars *tikv.Variables)

SetVars sets variables to the transaction.

func (*KVTxn) Size 

func (txn *KVTxn) Size() int

Size returns sum of keys and values length.

func (*KVTxn) StartAggressiveLocking added in v2.0.3 

func (txn *KVTxn) StartAggressiveLocking()

StartAggressiveLocking makes the transaction enters aggressive locking state.

Aggressive locking refers to the behavior that when a DML in a pessimistic transaction encounters write conflict, do not pessimistic-rollback them immediately; instead, keep the already-acquired locks and retry the statement. In this way, during retry, if it needs to acquire the same locks that was acquired in the previous execution, the lock RPC can be skipped. After finishing the execution, if some of the locks that were acquired in the previous execution but not needed in the current retried execution, they will be released.

In aggressive locking state, keys locked by `LockKeys` will be recorded to a separated buffer. For `LockKeys` invocations that involves only one key, the pessimistic lock request will be performed in ForceLock mode (kvrpcpb.PessimisticLockWakeUpMode_WakeUpModeForceLock).

func (*KVTxn) StartTS 

func (txn *KVTxn) StartTS() uint64

StartTS returns the transaction start timestamp.

func (*KVTxn) String 

func (txn *KVTxn) String() string

String implements fmt.Stringer interface.

func (*KVTxn) Valid 

func (txn *KVTxn) Valid() bool

Valid returns if the transaction is valid. A transaction become invalid after commit or rollback.

type MemBufferMutationsProbe 

type MemBufferMutationsProbe struct {
	// contains filtered or unexported fields
}

MemBufferMutationsProbe exports memBufferMutations for test purposes.

func NewMemBufferMutationsProbe 

func NewMemBufferMutationsProbe(sizeHint int, storage *unionstore.MemDB) MemBufferMutationsProbe

NewMemBufferMutationsProbe creates a new memBufferMutations instance for testing purpose.

func (MemBufferMutationsProbe) GetKey 

func (m MemBufferMutationsProbe) GetKey(i int) []byte

func (MemBufferMutationsProbe) GetKeys 

func (m MemBufferMutationsProbe) GetKeys() [][]byte

func (MemBufferMutationsProbe) GetOp 

func (m MemBufferMutationsProbe) GetOp(i int) kvrpcpb.Op

func (MemBufferMutationsProbe) GetValue 

func (m MemBufferMutationsProbe) GetValue(i int) []byte

func (MemBufferMutationsProbe) IsAssertExists 

func (m MemBufferMutationsProbe) IsAssertExists(i int) bool

func (MemBufferMutationsProbe) IsAssertNotExist 

func (m MemBufferMutationsProbe) IsAssertNotExist(i int) bool

func (MemBufferMutationsProbe) IsPessimisticLock 

func (m MemBufferMutationsProbe) IsPessimisticLock(i int) bool

func (MemBufferMutationsProbe) Len 

func (m MemBufferMutationsProbe) Len() int

func (MemBufferMutationsProbe) NeedConstraintCheckInPrewrite added in v2.0.2 

func (m MemBufferMutationsProbe) NeedConstraintCheckInPrewrite(i int) bool

func (MemBufferMutationsProbe) Push 

func (m MemBufferMutationsProbe) Push(op kvrpcpb.Op, isPessimisticLock, assertExist, assertNotExist, NeedConstraintCheckInPrewrite bool,
	handle unionstore.MemKeyHandle)

func (MemBufferMutationsProbe) Slice 

func (m MemBufferMutationsProbe) Slice(from, to int) CommitterMutations

type PlainMutation 

type PlainMutation struct {
	KeyOp kvrpcpb.Op
	Key   []byte
	Value []byte
	Flags CommitterMutationFlags
}

PlainMutation represents a single transaction operation.

type PlainMutations 

type PlainMutations struct {
	// contains filtered or unexported fields
}

PlainMutations contains transaction operations.

func NewPlainMutations 

func NewPlainMutations(sizeHint int) PlainMutations

NewPlainMutations creates a PlainMutations object with sizeHint reserved.

func (*PlainMutations) AppendMutation 

func (c *PlainMutations) AppendMutation(mutation PlainMutation)

AppendMutation merges a single Mutation into the current mutations.

func (*PlainMutations) GetFlags 

func (c *PlainMutations) GetFlags() []CommitterMutationFlags

GetFlags returns the flags on the mutations.

func (*PlainMutations) GetKey 

func (c *PlainMutations) GetKey(i int) []byte

GetKey returns the key at index.

func (*PlainMutations) GetKeys 

func (c *PlainMutations) GetKeys() [][]byte

GetKeys returns the keys.

func (*PlainMutations) GetOp 

func (c *PlainMutations) GetOp(i int) kvrpcpb.Op

GetOp returns the key op at index.

func (*PlainMutations) GetOps 

func (c *PlainMutations) GetOps() []kvrpcpb.Op

GetOps returns the key ops.

func (*PlainMutations) GetValue 

func (c *PlainMutations) GetValue(i int) []byte

GetValue returns the key value at index.

func (*PlainMutations) GetValues 

func (c *PlainMutations) GetValues() [][]byte

GetValues returns the key values.

func (*PlainMutations) IsAssertExists 

func (c *PlainMutations) IsAssertExists(i int) bool

IsAssertExists returns the key assertExist flag at index.

func (*PlainMutations) IsAssertNotExist 

func (c *PlainMutations) IsAssertNotExist(i int) bool

IsAssertNotExist returns the key assertNotExist flag at index.

func (*PlainMutations) IsPessimisticLock 

func (c *PlainMutations) IsPessimisticLock(i int) bool

IsPessimisticLock returns the key pessimistic flag at index.

func (*PlainMutations) Len 

func (c *PlainMutations) Len() int

Len returns the count of mutations.

func (*PlainMutations) MergeMutations 

func (c *PlainMutations) MergeMutations(mutations PlainMutations)

MergeMutations append input mutations into current mutations.

func (*PlainMutations) NeedConstraintCheckInPrewrite added in v2.0.2 

func (c *PlainMutations) NeedConstraintCheckInPrewrite(i int) bool

NeedConstraintCheckInPrewrite returns the key NeedConstraintCheckInPrewrite flag at index.

func (*PlainMutations) Push 

func (c *PlainMutations) Push(op kvrpcpb.Op, key []byte, value []byte, isPessimisticLock, assertExist,
	assertNotExist, NeedConstraintCheckInPrewrite bool)

Push another mutation into mutations.

func (*PlainMutations) Slice 

func (c *PlainMutations) Slice(from, to int) CommitterMutations

Slice return a sub mutations in range [from, to).

type RelatedSchemaChange 

type RelatedSchemaChange struct {
	PhyTblIDS        []int64
	ActionTypes      []uint64
	LatestInfoSchema SchemaVer
}

RelatedSchemaChange contains information about schema diff between two schema versions.

type SchemaLeaseChecker 

type SchemaLeaseChecker interface {
	// CheckBySchemaVer checks if the schema has changed for the transaction related tables between the startSchemaVer
	// and the schema version at txnTS, all the related schema changes will be returned.
	CheckBySchemaVer(txnTS uint64, startSchemaVer SchemaVer) (*RelatedSchemaChange, error)
}

SchemaLeaseChecker is used to validate schema version is not changed during transaction execution.

type SchemaVer 

type SchemaVer interface {
	// SchemaMetaVersion returns the meta schema version.
	SchemaMetaVersion() int64
}

SchemaVer is the infoSchema which will return the schema version.

type TxnInfo 

type TxnInfo struct {
	TxnScope            string `json:"txn_scope"`
	StartTS             uint64 `json:"start_ts"`
	CommitTS            uint64 `json:"commit_ts"`
	TxnCommitMode       string `json:"txn_commit_mode"`
	AsyncCommitFallback bool   `json:"async_commit_fallback"`
	OnePCFallback       bool   `json:"one_pc_fallback"`
	ErrMsg              string `json:"error,omitempty"`
}

TxnInfo is used to keep track the info of a committed transaction (mainly for diagnosis and testing)

type TxnOptions added in v2.0.2 

type TxnOptions struct {
	TxnScope string
	StartTS  *uint64
}

TxnOptions indicates the option when beginning a transaction. TxnOptions are set by the TxnOption values passed to Begin

type TxnProbe 

type TxnProbe struct {
	*KVTxn
}

TxnProbe wraps a txn and exports internal states for testing purpose.

func (TxnProbe) BatchGetSingleRegion 

func (txn TxnProbe) BatchGetSingleRegion(bo *retry.Backoffer, region locate.RegionVerID, keys [][]byte, collect func([]byte, []byte)) error

BatchGetSingleRegion gets a batch of keys from a region.

func (TxnProbe) CollectLockedKeys 

func (txn TxnProbe) CollectLockedKeys() [][]byte

CollectLockedKeys returns all locked keys of a transaction.

func (TxnProbe) GetAggressiveLockingKeys added in v2.0.3 

func (txn TxnProbe) GetAggressiveLockingKeys() []string

GetAggressiveLockingKeys returns the keys that are in the current aggressive locking stage.

func (TxnProbe) GetAggressiveLockingPreviousKeys added in v2.0.3 

func (txn TxnProbe) GetAggressiveLockingPreviousKeys() []string

GetAggressiveLockingPreviousKeys returns the keys that were locked in the previous aggressive locking stage.

func (TxnProbe) GetCommitTS 

func (txn TxnProbe) GetCommitTS() uint64

GetCommitTS returns the commit ts.

func (TxnProbe) GetCommitter 

func (txn TxnProbe) GetCommitter() CommitterProbe

GetCommitter returns the transaction committer.

func (TxnProbe) GetLockedCount added in v2.0.2 

func (txn TxnProbe) GetLockedCount() int

GetLockedCount returns the count of locks acquired by the transaction

func (TxnProbe) GetStartTime 

func (txn TxnProbe) GetStartTime() time.Time

GetStartTime returns the time when txn starts.

func (TxnProbe) GetUnionStore 

func (txn TxnProbe) GetUnionStore() *unionstore.KVUnionStore

GetUnionStore returns transaction's embedded unionstore.

func (TxnProbe) IsAsyncCommit 

func (txn TxnProbe) IsAsyncCommit() bool

IsAsyncCommit returns if the txn is committed using async commit.

func (TxnProbe) NewCommitter 

func (txn TxnProbe) NewCommitter(sessionID uint64) (CommitterProbe, error)

NewCommitter creates an committer.

func (TxnProbe) NewScanner 

func (txn TxnProbe) NewScanner(start, end []byte, batchSize int, reverse bool) (*txnsnapshot.Scanner, error)

NewScanner returns a scanner to iterate given key range.

func (TxnProbe) SetCommitter 

func (txn TxnProbe) SetCommitter(committer CommitterProbe)

SetCommitter sets the bind committer of a transaction.

func (TxnProbe) SetStartTS 

func (txn TxnProbe) SetStartTS(ts uint64)

SetStartTS resets the txn's start ts.

Source Files

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