domain

package
v3.1.0-fork Latest Latest
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 Go to latest Published: Apr 18, 2020 License: Apache-2.0 Imports: 46 Imported by: 0

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Index

Constants

View Source 
const (
	// ResultSucc means schemaValidator's check is passing.
	ResultSucc checkResult = iota
	// ResultFail means schemaValidator's check is fail.
	ResultFail
	// ResultUnknown means schemaValidator doesn't know the check would be success or fail.
	ResultUnknown
)

Variables

View Source 
var (
	// ErrInfoSchemaExpired returns the error that information schema is out of date.
	ErrInfoSchemaExpired = terror.ClassDomain.New(errno.ErrInfoSchemaExpired, errno.MySQLErrName[errno.ErrInfoSchemaExpired])
	// ErrInfoSchemaChanged returns the error that information schema is changed.
	ErrInfoSchemaChanged = terror.ClassDomain.New(errno.ErrInfoSchemaChanged,
		errno.MySQLErrName[errno.ErrInfoSchemaChanged]+". "+kv.TxnRetryableMark)
)
View Source 
var (
	// SchemaOutOfDateRetryInterval is the backoff time before retrying.
	SchemaOutOfDateRetryInterval = int64(500 * time.Millisecond)
	// SchemaOutOfDateRetryTimes is the max retry count when the schema is out of date.
	SchemaOutOfDateRetryTimes = int32(10)
)
View Source 
var RunAutoAnalyze = true

RunAutoAnalyze indicates if this TiDB server starts auto analyze worker and can run auto analyze job.

Functions

func BindDomain 

func BindDomain(ctx sessionctx.Context, domain *Domain)

BindDomain binds domain to context.

Types

type Domain 

type Domain struct {
	SchemaValidator SchemaValidator
	// contains filtered or unexported fields
}

Domain represents a storage space. Different domains can use the same database name. Multiple domains can be used in parallel without synchronization.

func GetDomain 

func GetDomain(ctx sessionctx.Context) *Domain

GetDomain gets domain from context.

func NewDomain 

func NewDomain(store kv.Storage, ddlLease time.Duration, statsLease time.Duration, factory pools.Factory) *Domain

NewDomain creates a new domain. Should not create multiple domains for the same store.

func (*Domain) BindHandle 

func (do *Domain) BindHandle() *bindinfo.BindHandle

BindHandle returns domain's bindHandle.

func (*Domain) Close 

func (do *Domain) Close()

Close closes the Domain and release its resource.

func (*Domain) CreateStatsHandle 

func (do *Domain) CreateStatsHandle(ctx sessionctx.Context)

CreateStatsHandle is used only for test.

func (*Domain) DDL 

func (do *Domain) DDL() ddl.DDL

DDL gets DDL from domain.

func (*Domain) ExpensiveQueryHandle 

func (do *Domain) ExpensiveQueryHandle() *expensivequery.Handle

ExpensiveQueryHandle returns the expensive query handle.

func (*Domain) GetEtcdClient 

func (do *Domain) GetEtcdClient() *clientv3.Client

GetEtcdClient returns the etcd client.

func (*Domain) GetGlobalVarsCache 

func (do *Domain) GetGlobalVarsCache() *GlobalVariableCache

GetGlobalVarsCache gets the global variable cache.

func (*Domain) GetScope 

func (do *Domain) GetScope(status string) variable.ScopeFlag

GetScope gets the status variables scope.

func (*Domain) GetSnapshotInfoSchema 

func (do *Domain) GetSnapshotInfoSchema(snapshotTS uint64) (infoschema.InfoSchema, error)

GetSnapshotInfoSchema gets a snapshot information schema.

func (*Domain) GetSnapshotMeta 

func (do *Domain) GetSnapshotMeta(startTS uint64) (*meta.Meta, error)

GetSnapshotMeta gets a new snapshot meta at startTS.

func (*Domain) InfoSchema 

func (do *Domain) InfoSchema() infoschema.InfoSchema

InfoSchema gets information schema from domain.

func (*Domain) InfoSyncer 

func (do *Domain) InfoSyncer() *infosync.InfoSyncer

InfoSyncer gets infoSyncer from domain.

func (*Domain) Init 

func (do *Domain) Init(ddlLease time.Duration, sysFactory func(*Domain) (pools.Resource, error)) error

Init initializes a domain.

func (*Domain) InitExpensiveQueryHandle 

func (do *Domain) InitExpensiveQueryHandle()

InitExpensiveQueryHandle init the expensive query handler.

func (*Domain) LoadBindInfoLoop 

func (do *Domain) LoadBindInfoLoop(ctxForHandle sessionctx.Context, ctxForEvolve sessionctx.Context) error

LoadBindInfoLoop create a goroutine loads BindInfo in a loop, it should be called only once in BootstrapSession.

func (*Domain) LoadPrivilegeLoop 

func (do *Domain) LoadPrivilegeLoop(ctx sessionctx.Context) error

LoadPrivilegeLoop create a goroutine loads privilege tables in a loop, it should be called only once in BootstrapSession.

func (*Domain) LogSlowQuery 

func (do *Domain) LogSlowQuery(query *SlowQueryInfo)

LogSlowQuery keeps topN recent slow queries in domain.

func (*Domain) NotifyUpdatePrivilege 

func (do *Domain) NotifyUpdatePrivilege(ctx sessionctx.Context)

NotifyUpdatePrivilege updates privilege key in etcd, TiDB client that watches the key will get notification.

func (*Domain) PrivilegeHandle 

func (do *Domain) PrivilegeHandle() *privileges.Handle

PrivilegeHandle returns the MySQLPrivilege.

func (*Domain) Reload 

func (do *Domain) Reload() error

Reload reloads InfoSchema. It's public in order to do the test.

func (*Domain) SetStatsUpdating 

func (do *Domain) SetStatsUpdating(val bool)

SetStatsUpdating sets the value of stats updating.

func (*Domain) ShowSlowQuery 

func (do *Domain) ShowSlowQuery(showSlow *ast.ShowSlow) []*SlowQueryInfo

ShowSlowQuery returns the slow queries.

func (*Domain) StatsHandle 

func (do *Domain) StatsHandle() *handle.Handle

StatsHandle returns the statistic handle.

func (*Domain) StatsUpdating 

func (do *Domain) StatsUpdating() bool

StatsUpdating checks if the stats worker is updating.

func (*Domain) Store 

func (do *Domain) Store() kv.Storage

Store gets KV store from domain.

func (*Domain) SysSessionPool 

func (do *Domain) SysSessionPool() *sessionPool

SysSessionPool returns the system session pool.

func (*Domain) UpdateTableStatsLoop 

func (do *Domain) UpdateTableStatsLoop(ctx sessionctx.Context) error

UpdateTableStatsLoop creates a goroutine loads stats info and updates stats info in a loop. It will also start a goroutine to analyze tables automatically. It should be called only once in BootstrapSession.

type GlobalVariableCache 

type GlobalVariableCache struct {
	sync.RWMutex

	SingleFight singleflight.Group
	// contains filtered or unexported fields
}

GlobalVariableCache caches global variables.

func (*GlobalVariableCache) Disable 

func (gvc *GlobalVariableCache) Disable()

Disable disables the global variable cache, used in test only.

func (*GlobalVariableCache) Get 

func (gvc *GlobalVariableCache) Get() (succ bool, rows []chunk.Row, fields []*ast.ResultField)

Get gets the global variables from cache.

func (*GlobalVariableCache) LoadGlobalVariables 

func (gvc *GlobalVariableCache) LoadGlobalVariables(loadFn func() ([]chunk.Row, []*ast.ResultField, error)) ([]chunk.Row, []*ast.ResultField, error)

LoadGlobalVariables will load from global cache first, loadFn will be executed if cache is not valid

func (*GlobalVariableCache) Update 

func (gvc *GlobalVariableCache) Update(rows []chunk.Row, fields []*ast.ResultField)

Update updates the global variable cache.

type SchemaChecker 

type SchemaChecker struct {
	SchemaValidator
	// contains filtered or unexported fields
}

SchemaChecker is used for checking schema-validity.

func NewSchemaChecker 

func NewSchemaChecker(do *Domain, schemaVer int64, relatedTableIDs []int64) *SchemaChecker

NewSchemaChecker creates a new schema checker.

func (*SchemaChecker) Check 

func (s *SchemaChecker) Check(txnTS uint64) error

Check checks the validity of the schema version.

type SchemaValidator 

type SchemaValidator interface {
	// Update the schema validator, add a new item, delete the expired deltaSchemaInfos.
	// The latest schemaVer is valid within leaseGrantTime plus lease duration.
	// Add the changed table IDs to the new schema information,
	// which is produced when the oldSchemaVer is updated to the newSchemaVer.
	Update(leaseGrantTime uint64, oldSchemaVer, newSchemaVer int64, changedTableIDs []int64)
	// Check is it valid for a transaction to use schemaVer and related tables, at timestamp txnTS.
	Check(txnTS uint64, schemaVer int64, relatedPhysicalTableIDs []int64) checkResult
	// Stop stops checking the valid of transaction.
	Stop()
	// Restart restarts the schema validator after it is stopped.
	Restart()
	// Reset resets SchemaValidator to initial state.
	Reset()
	// IsStarted indicates whether SchemaValidator is started.
	IsStarted() bool
}

SchemaValidator is the interface for checking the validity of schema version.

func NewSchemaValidator 

func NewSchemaValidator(lease time.Duration) SchemaValidator

NewSchemaValidator returns a SchemaValidator structure.

type SlowQueryInfo 

type SlowQueryInfo struct {
	SQL        string
	Start      time.Time
	Duration   time.Duration
	Detail     execdetails.ExecDetails
	ConnID     uint64
	TxnTS      uint64
	User       string
	DB         string
	TableIDs   string
	IndexNames string
	Digest     string
	Internal   bool
	Succ       bool
}

SlowQueryInfo is a struct to record slow query info.

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