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vitessio/vitess
go/vt/vtgate/scatter_conn.go
NewScatterConn
func NewScatterConn(statsName string, txConn *TxConn, gw gateway.Gateway, hc discovery.HealthCheck) *ScatterConn { tabletCallErrorCountStatsName := "" if statsName != "" { tabletCallErrorCountStatsName = statsName + "ErrorCount" } return &ScatterConn{ timings: stats.NewMultiTimings( statsName, "Scatter connection timings", []string{"Operation", "Keyspace", "ShardName", "DbType"}), tabletCallErrorCount: stats.NewCountersWithMultiLabels( tabletCallErrorCountStatsName, "Error count from tablet calls in scatter conns", []string{"Operation", "Keyspace", "ShardName", "DbType"}), txConn: txConn, gateway: gw, healthCheck: hc, } }
go
func NewScatterConn(statsName string, txConn *TxConn, gw gateway.Gateway, hc discovery.HealthCheck) *ScatterConn { tabletCallErrorCountStatsName := "" if statsName != "" { tabletCallErrorCountStatsName = statsName + "ErrorCount" } return &ScatterConn{ timings: stats.NewMultiTimings( statsName, "Scatter connection timings", []string{"Operation", "Keyspace", "ShardName", "DbType"}), tabletCallErrorCount: stats.NewCountersWithMultiLabels( tabletCallErrorCountStatsName, "Error count from tablet calls in scatter conns", []string{"Operation", "Keyspace", "ShardName", "DbType"}), txConn: txConn, gateway: gw, healthCheck: hc, } }
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// NewScatterConn creates a new ScatterConn.
[ "NewScatterConn", "creates", "a", "new", "ScatterConn", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L76-L94
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
Execute
func (stc *ScatterConn) Execute( ctx context.Context, query string, bindVars map[string]*querypb.BindVariable, rss []*srvtopo.ResolvedShard, tabletType topodatapb.TabletType, session *SafeSession, notInTransaction bool, options *querypb.ExecuteOptions, ) (*sqltypes.Result, error) { // mu protects qr var mu sync.Mutex qr := new(sqltypes.Result) allErrors := stc.multiGoTransaction( ctx, "Execute", rss, tabletType, session, notInTransaction, func(rs *srvtopo.ResolvedShard, i int, shouldBegin bool, transactionID int64) (int64, error) { var innerqr *sqltypes.Result if shouldBegin { var err error innerqr, transactionID, err = rs.QueryService.BeginExecute(ctx, rs.Target, query, bindVars, options) if err != nil { return transactionID, err } } else { var err error innerqr, err = rs.QueryService.Execute(ctx, rs.Target, query, bindVars, transactionID, options) if err != nil { return transactionID, err } } mu.Lock() defer mu.Unlock() qr.AppendResult(innerqr) return transactionID, nil }) return qr, allErrors.AggrError(vterrors.Aggregate) }
go
func (stc *ScatterConn) Execute( ctx context.Context, query string, bindVars map[string]*querypb.BindVariable, rss []*srvtopo.ResolvedShard, tabletType topodatapb.TabletType, session *SafeSession, notInTransaction bool, options *querypb.ExecuteOptions, ) (*sqltypes.Result, error) { // mu protects qr var mu sync.Mutex qr := new(sqltypes.Result) allErrors := stc.multiGoTransaction( ctx, "Execute", rss, tabletType, session, notInTransaction, func(rs *srvtopo.ResolvedShard, i int, shouldBegin bool, transactionID int64) (int64, error) { var innerqr *sqltypes.Result if shouldBegin { var err error innerqr, transactionID, err = rs.QueryService.BeginExecute(ctx, rs.Target, query, bindVars, options) if err != nil { return transactionID, err } } else { var err error innerqr, err = rs.QueryService.Execute(ctx, rs.Target, query, bindVars, transactionID, options) if err != nil { return transactionID, err } } mu.Lock() defer mu.Unlock() qr.AppendResult(innerqr) return transactionID, nil }) return qr, allErrors.AggrError(vterrors.Aggregate) }
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// Execute executes a non-streaming query on the specified shards.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L120-L165
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
ExecuteMultiShard
func (stc *ScatterConn) ExecuteMultiShard( ctx context.Context, rss []*srvtopo.ResolvedShard, queries []*querypb.BoundQuery, tabletType topodatapb.TabletType, session *SafeSession, notInTransaction bool, autocommit bool, ) (qr *sqltypes.Result, errs []error) { // mu protects qr var mu sync.Mutex qr = new(sqltypes.Result) allErrors := stc.multiGoTransaction( ctx, "Execute", rss, tabletType, session, notInTransaction, func(rs *srvtopo.ResolvedShard, i int, shouldBegin bool, transactionID int64) (int64, error) { var ( innerqr *sqltypes.Result err error opts *querypb.ExecuteOptions ) if session != nil && session.Session != nil { opts = session.Session.Options } switch { case autocommit: innerqr, err = stc.executeAutocommit(ctx, rs, queries[i].Sql, queries[i].BindVariables, opts) case shouldBegin: innerqr, transactionID, err = rs.QueryService.BeginExecute(ctx, rs.Target, queries[i].Sql, queries[i].BindVariables, opts) default: innerqr, err = rs.QueryService.Execute(ctx, rs.Target, queries[i].Sql, queries[i].BindVariables, transactionID, opts) } if err != nil { return transactionID, err } mu.Lock() defer mu.Unlock() qr.AppendResult(innerqr) return transactionID, nil }) return qr, allErrors.GetErrors() }
go
func (stc *ScatterConn) ExecuteMultiShard( ctx context.Context, rss []*srvtopo.ResolvedShard, queries []*querypb.BoundQuery, tabletType topodatapb.TabletType, session *SafeSession, notInTransaction bool, autocommit bool, ) (qr *sqltypes.Result, errs []error) { // mu protects qr var mu sync.Mutex qr = new(sqltypes.Result) allErrors := stc.multiGoTransaction( ctx, "Execute", rss, tabletType, session, notInTransaction, func(rs *srvtopo.ResolvedShard, i int, shouldBegin bool, transactionID int64) (int64, error) { var ( innerqr *sqltypes.Result err error opts *querypb.ExecuteOptions ) if session != nil && session.Session != nil { opts = session.Session.Options } switch { case autocommit: innerqr, err = stc.executeAutocommit(ctx, rs, queries[i].Sql, queries[i].BindVariables, opts) case shouldBegin: innerqr, transactionID, err = rs.QueryService.BeginExecute(ctx, rs.Target, queries[i].Sql, queries[i].BindVariables, opts) default: innerqr, err = rs.QueryService.Execute(ctx, rs.Target, queries[i].Sql, queries[i].BindVariables, transactionID, opts) } if err != nil { return transactionID, err } mu.Lock() defer mu.Unlock() qr.AppendResult(innerqr) return transactionID, nil }) return qr, allErrors.GetErrors() }
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// ExecuteMultiShard is like Execute, // but each shard gets its own Sql Queries and BindVariables. // // It always returns a non-nil query result and an array of // shard errors which may be nil so that callers can optionally // process a partially-successful operation.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L173-L223
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
ExecuteBatch
func (stc *ScatterConn) ExecuteBatch( ctx context.Context, batchRequest *scatterBatchRequest, tabletType topodatapb.TabletType, asTransaction bool, session *SafeSession, options *querypb.ExecuteOptions) (qrs []sqltypes.Result, err error) { allErrors := new(concurrency.AllErrorRecorder) results := make([]sqltypes.Result, batchRequest.length) var resMutex sync.Mutex var wg sync.WaitGroup for _, req := range batchRequest.requests { wg.Add(1) go func(req *shardBatchRequest) { defer wg.Done() var err error startTime, statsKey := stc.startAction("ExecuteBatch", req.rs.Target) defer stc.endAction(startTime, allErrors, statsKey, &err, session) shouldBegin, transactionID := transactionInfo(req.rs.Target, session, false) var innerqrs []sqltypes.Result if shouldBegin { innerqrs, transactionID, err = req.rs.QueryService.BeginExecuteBatch(ctx, req.rs.Target, req.queries, asTransaction, options) if transactionID != 0 { if appendErr := session.Append(&vtgatepb.Session_ShardSession{ Target: req.rs.Target, TransactionId: transactionID, }, stc.txConn.mode); appendErr != nil { err = appendErr } } if err != nil { return } } else { innerqrs, err = req.rs.QueryService.ExecuteBatch(ctx, req.rs.Target, req.queries, asTransaction, transactionID, options) if err != nil { return } } resMutex.Lock() defer resMutex.Unlock() for i, result := range innerqrs { results[req.resultIndexes[i]].AppendResult(&result) } }(req) } wg.Wait() if session.MustRollback() { stc.txConn.Rollback(ctx, session) } if allErrors.HasErrors() { return nil, allErrors.AggrError(vterrors.Aggregate) } return results, nil }
go
func (stc *ScatterConn) ExecuteBatch( ctx context.Context, batchRequest *scatterBatchRequest, tabletType topodatapb.TabletType, asTransaction bool, session *SafeSession, options *querypb.ExecuteOptions) (qrs []sqltypes.Result, err error) { allErrors := new(concurrency.AllErrorRecorder) results := make([]sqltypes.Result, batchRequest.length) var resMutex sync.Mutex var wg sync.WaitGroup for _, req := range batchRequest.requests { wg.Add(1) go func(req *shardBatchRequest) { defer wg.Done() var err error startTime, statsKey := stc.startAction("ExecuteBatch", req.rs.Target) defer stc.endAction(startTime, allErrors, statsKey, &err, session) shouldBegin, transactionID := transactionInfo(req.rs.Target, session, false) var innerqrs []sqltypes.Result if shouldBegin { innerqrs, transactionID, err = req.rs.QueryService.BeginExecuteBatch(ctx, req.rs.Target, req.queries, asTransaction, options) if transactionID != 0 { if appendErr := session.Append(&vtgatepb.Session_ShardSession{ Target: req.rs.Target, TransactionId: transactionID, }, stc.txConn.mode); appendErr != nil { err = appendErr } } if err != nil { return } } else { innerqrs, err = req.rs.QueryService.ExecuteBatch(ctx, req.rs.Target, req.queries, asTransaction, transactionID, options) if err != nil { return } } resMutex.Lock() defer resMutex.Unlock() for i, result := range innerqrs { results[req.resultIndexes[i]].AppendResult(&result) } }(req) } wg.Wait() if session.MustRollback() { stc.txConn.Rollback(ctx, session) } if allErrors.HasErrors() { return nil, allErrors.AggrError(vterrors.Aggregate) } return results, nil }
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// ExecuteBatch executes a batch of non-streaming queries on the specified shards.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L362-L422
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
StreamExecute
func (stc *ScatterConn) StreamExecute( ctx context.Context, query string, bindVars map[string]*querypb.BindVariable, rss []*srvtopo.ResolvedShard, tabletType topodatapb.TabletType, options *querypb.ExecuteOptions, callback func(reply *sqltypes.Result) error, ) error { // mu protects fieldSent, replyErr and callback var mu sync.Mutex fieldSent := false allErrors := stc.multiGo(ctx, "StreamExecute", rss, tabletType, func(rs *srvtopo.ResolvedShard, i int) error { return rs.QueryService.StreamExecute(ctx, rs.Target, query, bindVars, 0, options, func(qr *sqltypes.Result) error { return stc.processOneStreamingResult(&mu, &fieldSent, qr, callback) }) }) return allErrors.AggrError(vterrors.Aggregate) }
go
func (stc *ScatterConn) StreamExecute( ctx context.Context, query string, bindVars map[string]*querypb.BindVariable, rss []*srvtopo.ResolvedShard, tabletType topodatapb.TabletType, options *querypb.ExecuteOptions, callback func(reply *sqltypes.Result) error, ) error { // mu protects fieldSent, replyErr and callback var mu sync.Mutex fieldSent := false allErrors := stc.multiGo(ctx, "StreamExecute", rss, tabletType, func(rs *srvtopo.ResolvedShard, i int) error { return rs.QueryService.StreamExecute(ctx, rs.Target, query, bindVars, 0, options, func(qr *sqltypes.Result) error { return stc.processOneStreamingResult(&mu, &fieldSent, qr, callback) }) }) return allErrors.AggrError(vterrors.Aggregate) }
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// StreamExecute executes a streaming query on vttablet. The retry rules are the same. // Note we guarantee the callback will not be called concurrently // by mutiple go routines, through processOneStreamingResult.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L446-L466
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
Reset
func (tt *timeTracker) Reset(target *querypb.Target) { tt.mu.Lock() defer tt.mu.Unlock() delete(tt.timestamps, target) }
go
func (tt *timeTracker) Reset(target *querypb.Target) { tt.mu.Lock() defer tt.mu.Unlock() delete(tt.timestamps, target) }
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// Reset resets the timestamp set by Record.
[ "Reset", "resets", "the", "timestamp", "set", "by", "Record", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L508-L512
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
Record
func (tt *timeTracker) Record(target *querypb.Target) time.Time { tt.mu.Lock() defer tt.mu.Unlock() last, ok := tt.timestamps[target] if !ok { last = time.Now() tt.timestamps[target] = last } return last }
go
func (tt *timeTracker) Record(target *querypb.Target) time.Time { tt.mu.Lock() defer tt.mu.Unlock() last, ok := tt.timestamps[target] if !ok { last = time.Now() tt.timestamps[target] = last } return last }
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// Record records the time to Now if there was no previous timestamp, // and it keeps returning that value until the next Reset.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L516-L525
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
MessageStream
func (stc *ScatterConn) MessageStream(ctx context.Context, rss []*srvtopo.ResolvedShard, name string, callback func(*sqltypes.Result) error) error { // The cancelable context is used for handling errors // from individual streams. ctx, cancel := context.WithCancel(ctx) defer cancel() // mu is used to merge multiple callback calls into one. var mu sync.Mutex fieldSent := false lastErrors := newTimeTracker() allErrors := stc.multiGo(ctx, "MessageStream", rss, topodatapb.TabletType_MASTER, func(rs *srvtopo.ResolvedShard, i int) error { // This loop handles the case where a reparent happens, which can cause // an individual stream to end. If we don't succeed on the retries for // messageStreamGracePeriod, we abort and return an error. for { err := rs.QueryService.MessageStream(ctx, rs.Target, name, func(qr *sqltypes.Result) error { lastErrors.Reset(rs.Target) return stc.processOneStreamingResult(&mu, &fieldSent, qr, callback) }) // nil and EOF are equivalent. UNAVAILABLE can be returned by vttablet if it's demoted // from master to replica. For any of these conditions, we have to retry. if err != nil && err != io.EOF && vterrors.Code(err) != vtrpcpb.Code_UNAVAILABLE { cancel() return err } // There was no error. We have to see if we need to retry. // If context was canceled, likely due to client disconnect, // return normally without retrying. select { case <-ctx.Done(): return nil default: } firstErrorTimeStamp := lastErrors.Record(rs.Target) if time.Since(firstErrorTimeStamp) >= *messageStreamGracePeriod { // Cancel all streams and return an error. cancel() return vterrors.Errorf(vtrpcpb.Code_DEADLINE_EXCEEDED, "message stream from %v has repeatedly failed for longer than %v", rs.Target, *messageStreamGracePeriod) } // It's not been too long since our last good send. Wait and retry. select { case <-ctx.Done(): return nil case <-time.After(*messageStreamGracePeriod / 5): } } }) return allErrors.AggrError(vterrors.Aggregate) }
go
func (stc *ScatterConn) MessageStream(ctx context.Context, rss []*srvtopo.ResolvedShard, name string, callback func(*sqltypes.Result) error) error { // The cancelable context is used for handling errors // from individual streams. ctx, cancel := context.WithCancel(ctx) defer cancel() // mu is used to merge multiple callback calls into one. var mu sync.Mutex fieldSent := false lastErrors := newTimeTracker() allErrors := stc.multiGo(ctx, "MessageStream", rss, topodatapb.TabletType_MASTER, func(rs *srvtopo.ResolvedShard, i int) error { // This loop handles the case where a reparent happens, which can cause // an individual stream to end. If we don't succeed on the retries for // messageStreamGracePeriod, we abort and return an error. for { err := rs.QueryService.MessageStream(ctx, rs.Target, name, func(qr *sqltypes.Result) error { lastErrors.Reset(rs.Target) return stc.processOneStreamingResult(&mu, &fieldSent, qr, callback) }) // nil and EOF are equivalent. UNAVAILABLE can be returned by vttablet if it's demoted // from master to replica. For any of these conditions, we have to retry. if err != nil && err != io.EOF && vterrors.Code(err) != vtrpcpb.Code_UNAVAILABLE { cancel() return err } // There was no error. We have to see if we need to retry. // If context was canceled, likely due to client disconnect, // return normally without retrying. select { case <-ctx.Done(): return nil default: } firstErrorTimeStamp := lastErrors.Record(rs.Target) if time.Since(firstErrorTimeStamp) >= *messageStreamGracePeriod { // Cancel all streams and return an error. cancel() return vterrors.Errorf(vtrpcpb.Code_DEADLINE_EXCEEDED, "message stream from %v has repeatedly failed for longer than %v", rs.Target, *messageStreamGracePeriod) } // It's not been too long since our last good send. Wait and retry. select { case <-ctx.Done(): return nil case <-time.After(*messageStreamGracePeriod / 5): } } }) return allErrors.AggrError(vterrors.Aggregate) }
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// MessageStream streams messages from the specified shards. // Note we guarantee the callback will not be called concurrently // by mutiple go routines, through processOneStreamingResult.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L530-L580
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
MessageAck
func (stc *ScatterConn) MessageAck(ctx context.Context, rss []*srvtopo.ResolvedShard, values [][]*querypb.Value, name string) (int64, error) { var mu sync.Mutex var totalCount int64 allErrors := stc.multiGo(ctx, "MessageAck", rss, topodatapb.TabletType_MASTER, func(rs *srvtopo.ResolvedShard, i int) error { count, err := rs.QueryService.MessageAck(ctx, rs.Target, name, values[i]) if err != nil { return err } mu.Lock() totalCount += count mu.Unlock() return nil }) return totalCount, allErrors.AggrError(vterrors.Aggregate) }
go
func (stc *ScatterConn) MessageAck(ctx context.Context, rss []*srvtopo.ResolvedShard, values [][]*querypb.Value, name string) (int64, error) { var mu sync.Mutex var totalCount int64 allErrors := stc.multiGo(ctx, "MessageAck", rss, topodatapb.TabletType_MASTER, func(rs *srvtopo.ResolvedShard, i int) error { count, err := rs.QueryService.MessageAck(ctx, rs.Target, name, values[i]) if err != nil { return err } mu.Lock() totalCount += count mu.Unlock() return nil }) return totalCount, allErrors.AggrError(vterrors.Aggregate) }
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// MessageAck acks messages across multiple shards.
[ "MessageAck", "acks", "messages", "across", "multiple", "shards", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L583-L597
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
UpdateStream
func (stc *ScatterConn) UpdateStream(ctx context.Context, rs *srvtopo.ResolvedShard, timestamp int64, position string, callback func(*querypb.StreamEvent) error) error { return rs.QueryService.UpdateStream(ctx, rs.Target, position, timestamp, callback) }
go
func (stc *ScatterConn) UpdateStream(ctx context.Context, rs *srvtopo.ResolvedShard, timestamp int64, position string, callback func(*querypb.StreamEvent) error) error { return rs.QueryService.UpdateStream(ctx, rs.Target, position, timestamp, callback) }
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// UpdateStream just sends the query to the ResolvedShard, // and sends the results back.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L601-L603
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
shuffleQueryParts
func shuffleQueryParts(splits []*vtgatepb.SplitQueryResponse_Part) { for i := len(splits) - 1; i >= 1; i-- { randIndex := shuffleQueryPartsRandomGenerator.Intn(i + 1) // swap splits[i], splits[randIndex] splits[randIndex], splits[i] = splits[i], splits[randIndex] } }
go
func shuffleQueryParts(splits []*vtgatepb.SplitQueryResponse_Part) { for i := len(splits) - 1; i >= 1; i-- { randIndex := shuffleQueryPartsRandomGenerator.Intn(i + 1) // swap splits[i], splits[randIndex] splits[randIndex], splits[i] = splits[i], splits[randIndex] } }
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// shuffleQueryParts performs an in-place shuffle of the given array. // The result is a psuedo-random permutation of the array chosen uniformally // from the space of all permutations.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L707-L713
train
vitessio/vitess
go/vt/vtgate/scatter_conn.go
multiGo
func (stc *ScatterConn) multiGo( ctx context.Context, name string, rss []*srvtopo.ResolvedShard, tabletType topodatapb.TabletType, action shardActionFunc, ) (allErrors *concurrency.AllErrorRecorder) { allErrors = new(concurrency.AllErrorRecorder) if len(rss) == 0 { return allErrors } oneShard := func(rs *srvtopo.ResolvedShard, i int) { var err error startTime, statsKey := stc.startAction(name, rs.Target) defer stc.endAction(startTime, allErrors, statsKey, &err, nil) err = action(rs, i) } if len(rss) == 1 { // only one shard, do it synchronously. oneShard(rss[0], 0) return allErrors } var wg sync.WaitGroup for i, rs := range rss { wg.Add(1) go func(rs *srvtopo.ResolvedShard, i int) { defer wg.Done() oneShard(rs, i) }(rs, i) } wg.Wait() return allErrors }
go
func (stc *ScatterConn) multiGo( ctx context.Context, name string, rss []*srvtopo.ResolvedShard, tabletType topodatapb.TabletType, action shardActionFunc, ) (allErrors *concurrency.AllErrorRecorder) { allErrors = new(concurrency.AllErrorRecorder) if len(rss) == 0 { return allErrors } oneShard := func(rs *srvtopo.ResolvedShard, i int) { var err error startTime, statsKey := stc.startAction(name, rs.Target) defer stc.endAction(startTime, allErrors, statsKey, &err, nil) err = action(rs, i) } if len(rss) == 1 { // only one shard, do it synchronously. oneShard(rss[0], 0) return allErrors } var wg sync.WaitGroup for i, rs := range rss { wg.Add(1) go func(rs *srvtopo.ResolvedShard, i int) { defer wg.Done() oneShard(rs, i) }(rs, i) } wg.Wait() return allErrors }
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// multiGo performs the requested 'action' on the specified // shards in parallel. This does not handle any transaction state. // The action function must match the shardActionFunc2 signature.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/scatter_conn.go#L728-L763
train
vitessio/vitess
go/vt/vttablet/endtoend/framework/eventcatcher.go
Next
func (tc *TxCatcher) Next() (*tabletserver.TxConnection, error) { event, err := tc.catcher.next() if err != nil { return nil, err } return event.(*tabletserver.TxConnection), nil }
go
func (tc *TxCatcher) Next() (*tabletserver.TxConnection, error) { event, err := tc.catcher.next() if err != nil { return nil, err } return event.(*tabletserver.TxConnection), nil }
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// Next fetches the next captured transaction. // If the wait is longer than one second, it returns an error.
[ "Next", "fetches", "the", "next", "captured", "transaction", ".", "If", "the", "wait", "is", "longer", "than", "one", "second", "it", "returns", "an", "error", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/endtoend/framework/eventcatcher.go#L47-L53
train
vitessio/vitess
go/vt/vttablet/endtoend/framework/eventcatcher.go
Next
func (qc *QueryCatcher) Next() (*tabletenv.LogStats, error) { event, err := qc.catcher.next() if err != nil { return nil, err } return event.(*tabletenv.LogStats), nil }
go
func (qc *QueryCatcher) Next() (*tabletenv.LogStats, error) { event, err := qc.catcher.next() if err != nil { return nil, err } return event.(*tabletenv.LogStats), nil }
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// Next fetches the next captured query. // If the wait is longer than one second, it returns an error.
[ "Next", "fetches", "the", "next", "captured", "query", ".", "If", "the", "wait", "is", "longer", "than", "one", "second", "it", "returns", "an", "error", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/endtoend/framework/eventcatcher.go#L74-L80
train
vitessio/vitess
go/vt/vttablet/endtoend/framework/eventcatcher.go
Close
func (catcher *eventCatcher) Close() { catcher.logger.Unsubscribe(catcher.in) close(catcher.in) }
go
func (catcher *eventCatcher) Close() { catcher.logger.Unsubscribe(catcher.in) close(catcher.in) }
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// Close closes the eventCatcher.
[ "Close", "closes", "the", "eventCatcher", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/endtoend/framework/eventcatcher.go#L111-L114
train
vitessio/vitess
go/vt/srvtopo/target_stats.go
Subscribe
func (tsm *TargetStatsMultiplexer) Subscribe() (int, <-chan (*TargetStatsEntry)) { i := tsm.nextIndex tsm.nextIndex++ c := make(chan (*TargetStatsEntry), 100) tsm.listeners[i] = c return i, c }
go
func (tsm *TargetStatsMultiplexer) Subscribe() (int, <-chan (*TargetStatsEntry)) { i := tsm.nextIndex tsm.nextIndex++ c := make(chan (*TargetStatsEntry), 100) tsm.listeners[i] = c return i, c }
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// Subscribe adds a channel to the list. // Will change the list.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/srvtopo/target_stats.go#L78-L84
train
vitessio/vitess
go/vt/srvtopo/target_stats.go
Unsubscribe
func (tsm *TargetStatsMultiplexer) Unsubscribe(i int) error { c, ok := tsm.listeners[i] if !ok { return fmt.Errorf("TargetStatsMultiplexer.Unsubscribe(%v): not suc channel", i) } delete(tsm.listeners, i) close(c) return nil }
go
func (tsm *TargetStatsMultiplexer) Unsubscribe(i int) error { c, ok := tsm.listeners[i] if !ok { return fmt.Errorf("TargetStatsMultiplexer.Unsubscribe(%v): not suc channel", i) } delete(tsm.listeners, i) close(c) return nil }
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// Unsubscribe removes a channel from the list. // Will change the list.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/srvtopo/target_stats.go#L88-L96
train
vitessio/vitess
go/vt/srvtopo/target_stats.go
Broadcast
func (tsm *TargetStatsMultiplexer) Broadcast(tse *TargetStatsEntry) { for _, c := range tsm.listeners { c <- tse } }
go
func (tsm *TargetStatsMultiplexer) Broadcast(tse *TargetStatsEntry) { for _, c := range tsm.listeners { c <- tse } }
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// Broadcast sends an update to the list. // Will read the list.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/srvtopo/target_stats.go#L106-L110
train
vitessio/vitess
go/vt/vtexplain/vtexplain.go
MarshalJSON
func (tq *TabletQuery) MarshalJSON() ([]byte, error) { // Convert Bindvars to strings for nicer output bindVars := make(map[string]string) for k, v := range tq.BindVars { var b strings.Builder sqlparser.EncodeValue(&b, v) bindVars[k] = b.String() } return jsonutil.MarshalNoEscape(&struct { Time int SQL string BindVars map[string]string }{ Time: tq.Time, SQL: tq.SQL, BindVars: bindVars, }) }
go
func (tq *TabletQuery) MarshalJSON() ([]byte, error) { // Convert Bindvars to strings for nicer output bindVars := make(map[string]string) for k, v := range tq.BindVars { var b strings.Builder sqlparser.EncodeValue(&b, v) bindVars[k] = b.String() } return jsonutil.MarshalNoEscape(&struct { Time int SQL string BindVars map[string]string }{ Time: tq.Time, SQL: tq.SQL, BindVars: bindVars, }) }
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// MarshalJSON renders the json structure
[ "MarshalJSON", "renders", "the", "json", "structure" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtexplain/vtexplain.go#L104-L122
train
vitessio/vitess
go/vt/vtexplain/vtexplain.go
Stop
func Stop() { // Cleanup all created fake dbs. if explainTopo != nil { for _, conn := range explainTopo.TabletConns { conn.tsv.StopService() } for _, conn := range explainTopo.TabletConns { conn.db.Close() } } }
go
func Stop() { // Cleanup all created fake dbs. if explainTopo != nil { for _, conn := range explainTopo.TabletConns { conn.tsv.StopService() } for _, conn := range explainTopo.TabletConns { conn.db.Close() } } }
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// Stop and cleans up fake execution environment
[ "Stop", "and", "cleans", "up", "fake", "execution", "environment" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtexplain/vtexplain.go#L172-L182
train
vitessio/vitess
go/vt/vtexplain/vtexplain.go
Run
func Run(sql string) ([]*Explain, error) { explains := make([]*Explain, 0, 16) var ( rem string err error ) for { // Need to strip comments in a loop to handle multiple comments // in a row. for { s := sqlparser.StripLeadingComments(sql) if s == sql { break } sql = s } sql, rem, err = sqlparser.SplitStatement(sql) if err != nil { return nil, err } if sql != "" { // Reset the global time simulator unless there's an open transaction // in the session from the previous staement. if vtgateSession == nil || !vtgateSession.GetInTransaction() { batchTime = sync2.NewBatcher(*batchInterval) } log.V(100).Infof("explain %s", sql) e, err := explain(sql) if err != nil { return nil, err } explains = append(explains, e) } sql = rem if sql == "" { break } } return explains, nil }
go
func Run(sql string) ([]*Explain, error) { explains := make([]*Explain, 0, 16) var ( rem string err error ) for { // Need to strip comments in a loop to handle multiple comments // in a row. for { s := sqlparser.StripLeadingComments(sql) if s == sql { break } sql = s } sql, rem, err = sqlparser.SplitStatement(sql) if err != nil { return nil, err } if sql != "" { // Reset the global time simulator unless there's an open transaction // in the session from the previous staement. if vtgateSession == nil || !vtgateSession.GetInTransaction() { batchTime = sync2.NewBatcher(*batchInterval) } log.V(100).Infof("explain %s", sql) e, err := explain(sql) if err != nil { return nil, err } explains = append(explains, e) } sql = rem if sql == "" { break } } return explains, nil }
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// Run the explain analysis on the given queries
[ "Run", "the", "explain", "analysis", "on", "the", "given", "queries" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtexplain/vtexplain.go#L232-L277
train
vitessio/vitess
go/vt/vtexplain/vtexplain.go
ExplainsAsText
func ExplainsAsText(explains []*Explain) string { var b bytes.Buffer for _, explain := range explains { fmt.Fprintf(&b, "----------------------------------------------------------------------\n") fmt.Fprintf(&b, "%s\n\n", explain.SQL) queries := make([]outputQuery, 0, 4) for tablet, actions := range explain.TabletActions { for _, q := range actions.MysqlQueries { queries = append(queries, outputQuery{ tablet: tablet, Time: q.Time, sql: q.SQL, }) } } // Make sure to sort first by the batch time and then by the // shard to avoid flakiness in the tests for parallel queries sort.SliceStable(queries, func(i, j int) bool { if queries[i].Time == queries[j].Time { return queries[i].tablet < queries[j].tablet } return queries[i].Time < queries[j].Time }) for _, q := range queries { fmt.Fprintf(&b, "%d %s: %s\n", q.Time, q.tablet, q.sql) } fmt.Fprintf(&b, "\n") } fmt.Fprintf(&b, "----------------------------------------------------------------------\n") return b.String() }
go
func ExplainsAsText(explains []*Explain) string { var b bytes.Buffer for _, explain := range explains { fmt.Fprintf(&b, "----------------------------------------------------------------------\n") fmt.Fprintf(&b, "%s\n\n", explain.SQL) queries := make([]outputQuery, 0, 4) for tablet, actions := range explain.TabletActions { for _, q := range actions.MysqlQueries { queries = append(queries, outputQuery{ tablet: tablet, Time: q.Time, sql: q.SQL, }) } } // Make sure to sort first by the batch time and then by the // shard to avoid flakiness in the tests for parallel queries sort.SliceStable(queries, func(i, j int) bool { if queries[i].Time == queries[j].Time { return queries[i].tablet < queries[j].tablet } return queries[i].Time < queries[j].Time }) for _, q := range queries { fmt.Fprintf(&b, "%d %s: %s\n", q.Time, q.tablet, q.sql) } fmt.Fprintf(&b, "\n") } fmt.Fprintf(&b, "----------------------------------------------------------------------\n") return b.String() }
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// ExplainsAsText returns a text representation of the explains in logical time // order
[ "ExplainsAsText", "returns", "a", "text", "representation", "of", "the", "explains", "in", "logical", "time", "order" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtexplain/vtexplain.go#L300-L333
train
vitessio/vitess
go/vt/vtexplain/vtexplain.go
ExplainsAsJSON
func ExplainsAsJSON(explains []*Explain) string { explainJSON, _ := jsonutil.MarshalIndentNoEscape(explains, "", " ") return string(explainJSON) }
go
func ExplainsAsJSON(explains []*Explain) string { explainJSON, _ := jsonutil.MarshalIndentNoEscape(explains, "", " ") return string(explainJSON) }
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// ExplainsAsJSON returns a json representation of the explains
[ "ExplainsAsJSON", "returns", "a", "json", "representation", "of", "the", "explains" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtexplain/vtexplain.go#L336-L339
train
vitessio/vitess
go/vt/vttablet/tabletmanager/replication_reporter.go
Report
func (r *replicationReporter) Report(isSlaveType, shouldQueryServiceBeRunning bool) (time.Duration, error) { if !isSlaveType { return 0, nil } status, statusErr := r.agent.MysqlDaemon.SlaveStatus() if statusErr == mysql.ErrNotSlave || (statusErr == nil && !status.SlaveSQLRunning && !status.SlaveIORunning) { // MySQL is up, but slave is either not configured or not running. // Both SQL and IO threads are stopped, so it's probably either // stopped on purpose, or stopped because of a mysqld restart. if !r.agent.slaveStopped() { // As far as we've been told, it isn't stopped on purpose, // so let's try to start it. if *mysqlctl.DisableActiveReparents { log.Infof("Slave is stopped. Running with --disable_active_reparents so will not try to reconnect to master...") } else { log.Infof("Slave is stopped. Trying to reconnect to master...") ctx, cancel := context.WithTimeout(r.agent.batchCtx, 5*time.Second) if err := repairReplication(ctx, r.agent); err != nil { log.Infof("Failed to reconnect to master: %v", err) } cancel() // Check status again. status, statusErr = r.agent.MysqlDaemon.SlaveStatus() } } } if statusErr != nil { // mysqld is not running or slave is not configured. // We can't report healthy. return 0, statusErr } if !status.SlaveRunning() { // mysqld is running, but slave is not replicating (most likely, // replication has been stopped). See if we can extrapolate. if r.lastKnownTime.IsZero() { // we can't. return 0, health.ErrSlaveNotRunning } // we can extrapolate with the worst possible // value (that is we made no replication // progress since last time, and just fell more behind). elapsed := r.now().Sub(r.lastKnownTime) return elapsed + r.lastKnownValue, nil } // we got a real value, save it. r.lastKnownValue = time.Duration(status.SecondsBehindMaster) * time.Second r.lastKnownTime = r.now() return r.lastKnownValue, nil }
go
func (r *replicationReporter) Report(isSlaveType, shouldQueryServiceBeRunning bool) (time.Duration, error) { if !isSlaveType { return 0, nil } status, statusErr := r.agent.MysqlDaemon.SlaveStatus() if statusErr == mysql.ErrNotSlave || (statusErr == nil && !status.SlaveSQLRunning && !status.SlaveIORunning) { // MySQL is up, but slave is either not configured or not running. // Both SQL and IO threads are stopped, so it's probably either // stopped on purpose, or stopped because of a mysqld restart. if !r.agent.slaveStopped() { // As far as we've been told, it isn't stopped on purpose, // so let's try to start it. if *mysqlctl.DisableActiveReparents { log.Infof("Slave is stopped. Running with --disable_active_reparents so will not try to reconnect to master...") } else { log.Infof("Slave is stopped. Trying to reconnect to master...") ctx, cancel := context.WithTimeout(r.agent.batchCtx, 5*time.Second) if err := repairReplication(ctx, r.agent); err != nil { log.Infof("Failed to reconnect to master: %v", err) } cancel() // Check status again. status, statusErr = r.agent.MysqlDaemon.SlaveStatus() } } } if statusErr != nil { // mysqld is not running or slave is not configured. // We can't report healthy. return 0, statusErr } if !status.SlaveRunning() { // mysqld is running, but slave is not replicating (most likely, // replication has been stopped). See if we can extrapolate. if r.lastKnownTime.IsZero() { // we can't. return 0, health.ErrSlaveNotRunning } // we can extrapolate with the worst possible // value (that is we made no replication // progress since last time, and just fell more behind). elapsed := r.now().Sub(r.lastKnownTime) return elapsed + r.lastKnownValue, nil } // we got a real value, save it. r.lastKnownValue = time.Duration(status.SecondsBehindMaster) * time.Second r.lastKnownTime = r.now() return r.lastKnownValue, nil }
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// Report is part of the health.Reporter interface
[ "Report", "is", "part", "of", "the", "health", ".", "Reporter", "interface" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletmanager/replication_reporter.go#L52-L104
train
vitessio/vitess
go/vt/vttablet/tabletmanager/replication_reporter.go
repairReplication
func repairReplication(ctx context.Context, agent *ActionAgent) error { if *mysqlctl.DisableActiveReparents { return fmt.Errorf("can't repair replication with --disable_active_reparents") } ts := agent.TopoServer tablet := agent.Tablet() si, err := ts.GetShard(ctx, tablet.Keyspace, tablet.Shard) if err != nil { return err } if !si.HasMaster() { return fmt.Errorf("no master tablet for shard %v/%v", tablet.Keyspace, tablet.Shard) } // If Orchestrator is configured and if Orchestrator is actively reparenting, we should not repairReplication if agent.orc != nil { re, err := agent.orc.InActiveShardRecovery(tablet) if err != nil { return err } if re { return fmt.Errorf("orchestrator actively reparenting shard %v, skipping repairReplication", si) } // Before repairing replication, tell Orchestrator to enter maintenance mode for this tablet and to // lock any other actions on this tablet by Orchestrator. if err := agent.orc.BeginMaintenance(agent.Tablet(), "vttablet has been told to StopSlave"); err != nil { log.Warningf("Orchestrator BeginMaintenance failed: %v", err) return vterrors.Wrap(err, "orchestrator BeginMaintenance failed, skipping repairReplication") } } return agent.setMasterRepairReplication(ctx, si.MasterAlias, 0, true) }
go
func repairReplication(ctx context.Context, agent *ActionAgent) error { if *mysqlctl.DisableActiveReparents { return fmt.Errorf("can't repair replication with --disable_active_reparents") } ts := agent.TopoServer tablet := agent.Tablet() si, err := ts.GetShard(ctx, tablet.Keyspace, tablet.Shard) if err != nil { return err } if !si.HasMaster() { return fmt.Errorf("no master tablet for shard %v/%v", tablet.Keyspace, tablet.Shard) } // If Orchestrator is configured and if Orchestrator is actively reparenting, we should not repairReplication if agent.orc != nil { re, err := agent.orc.InActiveShardRecovery(tablet) if err != nil { return err } if re { return fmt.Errorf("orchestrator actively reparenting shard %v, skipping repairReplication", si) } // Before repairing replication, tell Orchestrator to enter maintenance mode for this tablet and to // lock any other actions on this tablet by Orchestrator. if err := agent.orc.BeginMaintenance(agent.Tablet(), "vttablet has been told to StopSlave"); err != nil { log.Warningf("Orchestrator BeginMaintenance failed: %v", err) return vterrors.Wrap(err, "orchestrator BeginMaintenance failed, skipping repairReplication") } } return agent.setMasterRepairReplication(ctx, si.MasterAlias, 0, true) }
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// repairReplication tries to connect this slave to whoever is // the current master of the shard, and start replicating.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletmanager/replication_reporter.go#L113-L148
train
vitessio/vitess
go/vt/vtgate/gateway/discoverygateway.go
RegisterStats
func (dg *discoveryGateway) RegisterStats() { stats.NewGaugeDurationFunc( "TopologyWatcherMaxRefreshLag", "maximum time since the topology watcher refreshed a cell", dg.topologyWatcherMaxRefreshLag, ) stats.NewGaugeFunc( "TopologyWatcherChecksum", "crc32 checksum of the topology watcher state", dg.topologyWatcherChecksum, ) }
go
func (dg *discoveryGateway) RegisterStats() { stats.NewGaugeDurationFunc( "TopologyWatcherMaxRefreshLag", "maximum time since the topology watcher refreshed a cell", dg.topologyWatcherMaxRefreshLag, ) stats.NewGaugeFunc( "TopologyWatcherChecksum", "crc32 checksum of the topology watcher state", dg.topologyWatcherChecksum, ) }
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// RegisterStats registers the stats to export the lag since the last refresh // and the checksum of the topology
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/gateway/discoverygateway.go#L139-L151
train
vitessio/vitess
go/vt/vtgate/gateway/discoverygateway.go
topologyWatcherMaxRefreshLag
func (dg *discoveryGateway) topologyWatcherMaxRefreshLag() time.Duration { var lag time.Duration for _, tw := range dg.tabletsWatchers { cellLag := tw.RefreshLag() if cellLag > lag { lag = cellLag } } return lag }
go
func (dg *discoveryGateway) topologyWatcherMaxRefreshLag() time.Duration { var lag time.Duration for _, tw := range dg.tabletsWatchers { cellLag := tw.RefreshLag() if cellLag > lag { lag = cellLag } } return lag }
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// topologyWatcherMaxRefreshLag returns the maximum lag since the watched // cells were refreshed from the topo server
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/gateway/discoverygateway.go#L155-L164
train
vitessio/vitess
go/vt/vtgate/gateway/discoverygateway.go
topologyWatcherChecksum
func (dg *discoveryGateway) topologyWatcherChecksum() int64 { var checksum int64 for _, tw := range dg.tabletsWatchers { checksum = checksum ^ int64(tw.TopoChecksum()) } return checksum }
go
func (dg *discoveryGateway) topologyWatcherChecksum() int64 { var checksum int64 for _, tw := range dg.tabletsWatchers { checksum = checksum ^ int64(tw.TopoChecksum()) } return checksum }
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// topologyWatcherChecksum returns a checksum of the topology watcher state
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/gateway/discoverygateway.go#L167-L173
train
vitessio/vitess
go/vt/vtgate/gateway/discoverygateway.go
StatsUpdate
func (dg *discoveryGateway) StatsUpdate(ts *discovery.TabletStats) { dg.tsc.StatsUpdate(ts) if ts.Target.TabletType == topodatapb.TabletType_MASTER { dg.buffer.StatsUpdate(ts) } }
go
func (dg *discoveryGateway) StatsUpdate(ts *discovery.TabletStats) { dg.tsc.StatsUpdate(ts) if ts.Target.TabletType == topodatapb.TabletType_MASTER { dg.buffer.StatsUpdate(ts) } }
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// StatsUpdate forwards HealthCheck updates to TabletStatsCache and MasterBuffer. // It is part of the discovery.HealthCheckStatsListener interface.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/gateway/discoverygateway.go#L177-L183
train
vitessio/vitess
go/vt/vtgate/gateway/discoverygateway.go
WaitForTablets
func (dg *discoveryGateway) WaitForTablets(ctx context.Context, tabletTypesToWait []topodatapb.TabletType) error { // Skip waiting for tablets if we are not told to do so. if len(tabletTypesToWait) == 0 { return nil } // Finds the targets to look for. targets, err := srvtopo.FindAllTargets(ctx, dg.srvTopoServer, dg.localCell, tabletTypesToWait) if err != nil { return err } return dg.tsc.WaitForAllServingTablets(ctx, targets) }
go
func (dg *discoveryGateway) WaitForTablets(ctx context.Context, tabletTypesToWait []topodatapb.TabletType) error { // Skip waiting for tablets if we are not told to do so. if len(tabletTypesToWait) == 0 { return nil } // Finds the targets to look for. targets, err := srvtopo.FindAllTargets(ctx, dg.srvTopoServer, dg.localCell, tabletTypesToWait) if err != nil { return err } return dg.tsc.WaitForAllServingTablets(ctx, targets) }
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// WaitForTablets is part of the gateway.Gateway interface.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/gateway/discoverygateway.go#L186-L199
train
vitessio/vitess
go/vt/vtgate/gateway/discoverygateway.go
GetAggregateStats
func (dg *discoveryGateway) GetAggregateStats(target *querypb.Target) (*querypb.AggregateStats, queryservice.QueryService, error) { stats, err := dg.tsc.GetAggregateStats(target) return stats, dg, err }
go
func (dg *discoveryGateway) GetAggregateStats(target *querypb.Target) (*querypb.AggregateStats, queryservice.QueryService, error) { stats, err := dg.tsc.GetAggregateStats(target) return stats, dg, err }
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// GetAggregateStats is part of the srvtopo.TargetStats interface.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/gateway/discoverygateway.go#L202-L205
train
vitessio/vitess
go/vt/vtgate/gateway/discoverygateway.go
GetMasterCell
func (dg *discoveryGateway) GetMasterCell(keyspace, shard string) (string, queryservice.QueryService, error) { cell, err := dg.tsc.GetMasterCell(keyspace, shard) return cell, dg, err }
go
func (dg *discoveryGateway) GetMasterCell(keyspace, shard string) (string, queryservice.QueryService, error) { cell, err := dg.tsc.GetMasterCell(keyspace, shard) return cell, dg, err }
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// GetMasterCell is part of the srvtopo.TargetStats interface.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/gateway/discoverygateway.go#L208-L211
train
vitessio/vitess
go/vt/vtgate/gateway/discoverygateway.go
Close
func (dg *discoveryGateway) Close(ctx context.Context) error { dg.buffer.Shutdown() for _, ctw := range dg.tabletsWatchers { ctw.Stop() } return nil }
go
func (dg *discoveryGateway) Close(ctx context.Context) error { dg.buffer.Shutdown() for _, ctw := range dg.tabletsWatchers { ctw.Stop() } return nil }
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// Close shuts down underlying connections. // This function hides the inner implementation.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/gateway/discoverygateway.go#L215-L221
train
vitessio/vitess
go/vt/vtgate/gateway/discoverygateway.go
withRetry
func (dg *discoveryGateway) withRetry(ctx context.Context, target *querypb.Target, unused queryservice.QueryService, name string, inTransaction bool, inner func(ctx context.Context, target *querypb.Target, conn queryservice.QueryService) (bool, error)) error { var tabletLastUsed *topodatapb.Tablet var err error invalidTablets := make(map[string]bool) if len(allowedTabletTypes) > 0 { var match bool for _, allowed := range allowedTabletTypes { if allowed == target.TabletType { match = true break } } if !match { return vterrors.Errorf(vtrpcpb.Code_FAILED_PRECONDITION, "requested tablet type %v is not part of the allowed tablet types for this vtgate: %+v", target.TabletType.String(), allowedTabletTypes) } } bufferedOnce := false for i := 0; i < dg.retryCount+1; i++ { // Check if we should buffer MASTER queries which failed due to an ongoing // failover. // Note: We only buffer once and only "!inTransaction" queries i.e. // a) no transaction is necessary (e.g. critical reads) or // b) no transaction was created yet. if !bufferedOnce && !inTransaction && target.TabletType == topodatapb.TabletType_MASTER { // The next call blocks if we should buffer during a failover. retryDone, bufferErr := dg.buffer.WaitForFailoverEnd(ctx, target.Keyspace, target.Shard, err) if bufferErr != nil { // Buffering failed e.g. buffer is already full. Do not retry. err = vterrors.Errorf( vterrors.Code(bufferErr), "failed to automatically buffer and retry failed request during failover: %v original err (type=%T): %v", bufferErr, err, err) break } // Request may have been buffered. if retryDone != nil { // We're going to retry this request as part of a buffer drain. // Notify the buffer after we retried. defer retryDone() bufferedOnce = true } } tablets := dg.tsc.GetHealthyTabletStats(target.Keyspace, target.Shard, target.TabletType) if len(tablets) == 0 { // fail fast if there is no tablet err = vterrors.New(vtrpcpb.Code_UNAVAILABLE, "no valid tablet") break } shuffleTablets(dg.localCell, tablets) // skip tablets we tried before var ts *discovery.TabletStats for _, t := range tablets { if _, ok := invalidTablets[t.Key]; !ok { ts = &t break } } if ts == nil { if err == nil { // do not override error from last attempt. err = vterrors.New(vtrpcpb.Code_UNAVAILABLE, "no available connection") } break } // execute tabletLastUsed = ts.Tablet conn := dg.hc.GetConnection(ts.Key) if conn == nil { err = vterrors.Errorf(vtrpcpb.Code_UNAVAILABLE, "no connection for key %v tablet %+v", ts.Key, ts.Tablet) invalidTablets[ts.Key] = true continue } startTime := time.Now() var canRetry bool canRetry, err = inner(ctx, ts.Target, conn) dg.updateStats(target, startTime, err) if canRetry { invalidTablets[ts.Key] = true continue } break } return NewShardError(err, target, tabletLastUsed) }
go
func (dg *discoveryGateway) withRetry(ctx context.Context, target *querypb.Target, unused queryservice.QueryService, name string, inTransaction bool, inner func(ctx context.Context, target *querypb.Target, conn queryservice.QueryService) (bool, error)) error { var tabletLastUsed *topodatapb.Tablet var err error invalidTablets := make(map[string]bool) if len(allowedTabletTypes) > 0 { var match bool for _, allowed := range allowedTabletTypes { if allowed == target.TabletType { match = true break } } if !match { return vterrors.Errorf(vtrpcpb.Code_FAILED_PRECONDITION, "requested tablet type %v is not part of the allowed tablet types for this vtgate: %+v", target.TabletType.String(), allowedTabletTypes) } } bufferedOnce := false for i := 0; i < dg.retryCount+1; i++ { // Check if we should buffer MASTER queries which failed due to an ongoing // failover. // Note: We only buffer once and only "!inTransaction" queries i.e. // a) no transaction is necessary (e.g. critical reads) or // b) no transaction was created yet. if !bufferedOnce && !inTransaction && target.TabletType == topodatapb.TabletType_MASTER { // The next call blocks if we should buffer during a failover. retryDone, bufferErr := dg.buffer.WaitForFailoverEnd(ctx, target.Keyspace, target.Shard, err) if bufferErr != nil { // Buffering failed e.g. buffer is already full. Do not retry. err = vterrors.Errorf( vterrors.Code(bufferErr), "failed to automatically buffer and retry failed request during failover: %v original err (type=%T): %v", bufferErr, err, err) break } // Request may have been buffered. if retryDone != nil { // We're going to retry this request as part of a buffer drain. // Notify the buffer after we retried. defer retryDone() bufferedOnce = true } } tablets := dg.tsc.GetHealthyTabletStats(target.Keyspace, target.Shard, target.TabletType) if len(tablets) == 0 { // fail fast if there is no tablet err = vterrors.New(vtrpcpb.Code_UNAVAILABLE, "no valid tablet") break } shuffleTablets(dg.localCell, tablets) // skip tablets we tried before var ts *discovery.TabletStats for _, t := range tablets { if _, ok := invalidTablets[t.Key]; !ok { ts = &t break } } if ts == nil { if err == nil { // do not override error from last attempt. err = vterrors.New(vtrpcpb.Code_UNAVAILABLE, "no available connection") } break } // execute tabletLastUsed = ts.Tablet conn := dg.hc.GetConnection(ts.Key) if conn == nil { err = vterrors.Errorf(vtrpcpb.Code_UNAVAILABLE, "no connection for key %v tablet %+v", ts.Key, ts.Tablet) invalidTablets[ts.Key] = true continue } startTime := time.Now() var canRetry bool canRetry, err = inner(ctx, ts.Target, conn) dg.updateStats(target, startTime, err) if canRetry { invalidTablets[ts.Key] = true continue } break } return NewShardError(err, target, tabletLastUsed) }
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// withRetry gets available connections and executes the action. If there are retryable errors, // it retries retryCount times before failing. It does not retry if the connection is in // the middle of a transaction. While returning the error check if it maybe a result of // a resharding event, and set the re-resolve bit and let the upper layers // re-resolve and retry.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/gateway/discoverygateway.go#L241-L331
train
vitessio/vitess
go/vt/vttablet/tabletserver/planbuilder/query_gen.go
GenerateFullQuery
func GenerateFullQuery(statement sqlparser.Statement) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) statement.Format(buf) return buf.ParsedQuery() }
go
func GenerateFullQuery(statement sqlparser.Statement) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) statement.Format(buf) return buf.ParsedQuery() }
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// GenerateFullQuery generates the full query from the ast.
[ "GenerateFullQuery", "generates", "the", "full", "query", "from", "the", "ast", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/planbuilder/query_gen.go#L25-L29
train
vitessio/vitess
go/vt/vttablet/tabletserver/planbuilder/query_gen.go
GenerateFieldQuery
func GenerateFieldQuery(statement sqlparser.Statement) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(sqlparser.FormatImpossibleQuery).WriteNode(statement) if buf.HasBindVars() { return nil } return buf.ParsedQuery() }
go
func GenerateFieldQuery(statement sqlparser.Statement) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(sqlparser.FormatImpossibleQuery).WriteNode(statement) if buf.HasBindVars() { return nil } return buf.ParsedQuery() }
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// GenerateFieldQuery generates a query to just fetch the field info // by adding impossible where clauses as needed.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/planbuilder/query_gen.go#L33-L41
train
vitessio/vitess
go/vt/vttablet/tabletserver/planbuilder/query_gen.go
GenerateLimitQuery
func GenerateLimitQuery(selStmt sqlparser.SelectStatement) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) switch sel := selStmt.(type) { case *sqlparser.Select: limit := sel.Limit if limit == nil { sel.Limit = execLimit defer func() { sel.Limit = nil }() } case *sqlparser.Union: // Code is identical to *Select, but this one is a *Union. limit := sel.Limit if limit == nil { sel.Limit = execLimit defer func() { sel.Limit = nil }() } } buf.Myprintf("%v", selStmt) return buf.ParsedQuery() }
go
func GenerateLimitQuery(selStmt sqlparser.SelectStatement) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) switch sel := selStmt.(type) { case *sqlparser.Select: limit := sel.Limit if limit == nil { sel.Limit = execLimit defer func() { sel.Limit = nil }() } case *sqlparser.Union: // Code is identical to *Select, but this one is a *Union. limit := sel.Limit if limit == nil { sel.Limit = execLimit defer func() { sel.Limit = nil }() } } buf.Myprintf("%v", selStmt) return buf.ParsedQuery() }
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// GenerateLimitQuery generates a select query with a limit clause.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/planbuilder/query_gen.go#L44-L67
train
vitessio/vitess
go/vt/vttablet/tabletserver/planbuilder/query_gen.go
GenerateInsertOuterQuery
func GenerateInsertOuterQuery(ins *sqlparser.Insert) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) buf.Myprintf("%s %v%sinto %v%v values %a", ins.Action, ins.Comments, ins.Ignore, ins.Table, ins.Columns, ":#values", ) return buf.ParsedQuery() }
go
func GenerateInsertOuterQuery(ins *sqlparser.Insert) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) buf.Myprintf("%s %v%sinto %v%v values %a", ins.Action, ins.Comments, ins.Ignore, ins.Table, ins.Columns, ":#values", ) return buf.ParsedQuery() }
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// GenerateInsertOuterQuery generates the outer query for inserts.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/planbuilder/query_gen.go#L70-L81
train
vitessio/vitess
go/vt/vttablet/tabletserver/planbuilder/query_gen.go
GenerateUpdateOuterQuery
func GenerateUpdateOuterQuery(upd *sqlparser.Update, aliased *sqlparser.AliasedTableExpr, formatter sqlparser.NodeFormatter) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(formatter) buf.Myprintf("update %v%v set %v where %a%v", upd.Comments, aliased.RemoveHints(), upd.Exprs, ":#pk", upd.OrderBy) return buf.ParsedQuery() }
go
func GenerateUpdateOuterQuery(upd *sqlparser.Update, aliased *sqlparser.AliasedTableExpr, formatter sqlparser.NodeFormatter) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(formatter) buf.Myprintf("update %v%v set %v where %a%v", upd.Comments, aliased.RemoveHints(), upd.Exprs, ":#pk", upd.OrderBy) return buf.ParsedQuery() }
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// GenerateUpdateOuterQuery generates the outer query for updates. // If there is no custom formatting needed, formatter can be nil.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/planbuilder/query_gen.go#L85-L89
train
vitessio/vitess
go/vt/vttablet/tabletserver/planbuilder/query_gen.go
GenerateDeleteOuterQuery
func GenerateDeleteOuterQuery(del *sqlparser.Delete, aliased *sqlparser.AliasedTableExpr) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) buf.Myprintf("delete %vfrom %v where %a%v", del.Comments, aliased.RemoveHints(), ":#pk", del.OrderBy) return buf.ParsedQuery() }
go
func GenerateDeleteOuterQuery(del *sqlparser.Delete, aliased *sqlparser.AliasedTableExpr) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) buf.Myprintf("delete %vfrom %v where %a%v", del.Comments, aliased.RemoveHints(), ":#pk", del.OrderBy) return buf.ParsedQuery() }
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// GenerateDeleteOuterQuery generates the outer query for deletes.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/planbuilder/query_gen.go#L92-L96
train
vitessio/vitess
go/vt/vttablet/tabletserver/planbuilder/query_gen.go
GenerateUpdateSubquery
func GenerateUpdateSubquery(upd *sqlparser.Update, table *schema.Table, aliased *sqlparser.AliasedTableExpr) *sqlparser.ParsedQuery { return GenerateSubquery( table.Indexes[0].Columns, aliased, upd.Where, upd.OrderBy, upd.Limit, true, ) }
go
func GenerateUpdateSubquery(upd *sqlparser.Update, table *schema.Table, aliased *sqlparser.AliasedTableExpr) *sqlparser.ParsedQuery { return GenerateSubquery( table.Indexes[0].Columns, aliased, upd.Where, upd.OrderBy, upd.Limit, true, ) }
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// GenerateUpdateSubquery generates the subquery for updates.
[ "GenerateUpdateSubquery", "generates", "the", "subquery", "for", "updates", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/planbuilder/query_gen.go#L99-L108
train
vitessio/vitess
go/vt/vttablet/tabletserver/planbuilder/query_gen.go
GenerateDeleteSubquery
func GenerateDeleteSubquery(del *sqlparser.Delete, table *schema.Table, aliased *sqlparser.AliasedTableExpr) *sqlparser.ParsedQuery { return GenerateSubquery( table.Indexes[0].Columns, aliased, del.Where, del.OrderBy, del.Limit, true, ) }
go
func GenerateDeleteSubquery(del *sqlparser.Delete, table *schema.Table, aliased *sqlparser.AliasedTableExpr) *sqlparser.ParsedQuery { return GenerateSubquery( table.Indexes[0].Columns, aliased, del.Where, del.OrderBy, del.Limit, true, ) }
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// GenerateDeleteSubquery generates the subquery for deletes.
[ "GenerateDeleteSubquery", "generates", "the", "subquery", "for", "deletes", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/planbuilder/query_gen.go#L111-L120
train
vitessio/vitess
go/vt/vttablet/tabletserver/planbuilder/query_gen.go
GenerateSubquery
func GenerateSubquery(columns []sqlparser.ColIdent, table *sqlparser.AliasedTableExpr, where *sqlparser.Where, order sqlparser.OrderBy, limit *sqlparser.Limit, forUpdate bool) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) if limit == nil { limit = execLimit } buf.WriteString("select ") prefix := "" for _, c := range columns { buf.Myprintf("%s%v", prefix, c) prefix = ", " } buf.Myprintf(" from %v%v%v%v", table, where, order, limit) if forUpdate { buf.Myprintf(sqlparser.ForUpdateStr) } return buf.ParsedQuery() }
go
func GenerateSubquery(columns []sqlparser.ColIdent, table *sqlparser.AliasedTableExpr, where *sqlparser.Where, order sqlparser.OrderBy, limit *sqlparser.Limit, forUpdate bool) *sqlparser.ParsedQuery { buf := sqlparser.NewTrackedBuffer(nil) if limit == nil { limit = execLimit } buf.WriteString("select ") prefix := "" for _, c := range columns { buf.Myprintf("%s%v", prefix, c) prefix = ", " } buf.Myprintf(" from %v%v%v%v", table, where, order, limit) if forUpdate { buf.Myprintf(sqlparser.ForUpdateStr) } return buf.ParsedQuery() }
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// GenerateSubquery generates a subquery based on the input parameters.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/planbuilder/query_gen.go#L123-L139
train
vitessio/vitess
go/vt/grpcclient/snappy.go
Compress
func (s SnappyCompressor) Compress(w io.Writer) (io.WriteCloser, error) { return snappy.NewBufferedWriter(w), nil }
go
func (s SnappyCompressor) Compress(w io.Writer) (io.WriteCloser, error) { return snappy.NewBufferedWriter(w), nil }
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// Compress wraps with a SnappyReader
[ "Compress", "wraps", "with", "a", "SnappyReader" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/grpcclient/snappy.go#L25-L27
train
vitessio/vitess
go/vt/grpcclient/snappy.go
Decompress
func (s SnappyCompressor) Decompress(r io.Reader) (io.Reader, error) { return snappy.NewReader(r), nil }
go
func (s SnappyCompressor) Decompress(r io.Reader) (io.Reader, error) { return snappy.NewReader(r), nil }
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// Decompress wraps with a SnappyReader
[ "Decompress", "wraps", "with", "a", "SnappyReader" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/grpcclient/snappy.go#L30-L32
train
vitessio/vitess
go/vt/servenv/service_map.go
updateServiceMap
func updateServiceMap() { for _, s := range serviceMapFlag { if s[0] == '-' { delete(serviceMap, s[1:]) } else { serviceMap[s] = true } } }
go
func updateServiceMap() { for _, s := range serviceMapFlag { if s[0] == '-' { delete(serviceMap, s[1:]) } else { serviceMap[s] = true } } }
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// updateServiceMap takes the command line parameter, and updates the // ServiceMap accordingly
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/servenv/service_map.go#L50-L58
train
vitessio/vitess
go/vt/topo/tablet.go
IsTrivialTypeChange
func IsTrivialTypeChange(oldTabletType, newTabletType topodatapb.TabletType) bool { switch oldTabletType { case topodatapb.TabletType_REPLICA, topodatapb.TabletType_RDONLY, topodatapb.TabletType_SPARE, topodatapb.TabletType_BACKUP, topodatapb.TabletType_EXPERIMENTAL, topodatapb.TabletType_DRAINED: switch newTabletType { case topodatapb.TabletType_REPLICA, topodatapb.TabletType_RDONLY, topodatapb.TabletType_SPARE, topodatapb.TabletType_BACKUP, topodatapb.TabletType_EXPERIMENTAL, topodatapb.TabletType_DRAINED: return true } case topodatapb.TabletType_RESTORE: switch newTabletType { case topodatapb.TabletType_SPARE: return true } } return false }
go
func IsTrivialTypeChange(oldTabletType, newTabletType topodatapb.TabletType) bool { switch oldTabletType { case topodatapb.TabletType_REPLICA, topodatapb.TabletType_RDONLY, topodatapb.TabletType_SPARE, topodatapb.TabletType_BACKUP, topodatapb.TabletType_EXPERIMENTAL, topodatapb.TabletType_DRAINED: switch newTabletType { case topodatapb.TabletType_REPLICA, topodatapb.TabletType_RDONLY, topodatapb.TabletType_SPARE, topodatapb.TabletType_BACKUP, topodatapb.TabletType_EXPERIMENTAL, topodatapb.TabletType_DRAINED: return true } case topodatapb.TabletType_RESTORE: switch newTabletType { case topodatapb.TabletType_SPARE: return true } } return false }
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// IsTrivialTypeChange returns if this db type be trivially reassigned // without changes to the replication graph
[ "IsTrivialTypeChange", "returns", "if", "this", "db", "type", "be", "trivially", "reassigned", "without", "changes", "to", "the", "replication", "graph" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L41-L55
train
vitessio/vitess
go/vt/topo/tablet.go
IsInServingGraph
func IsInServingGraph(tt topodatapb.TabletType) bool { switch tt { case topodatapb.TabletType_MASTER, topodatapb.TabletType_REPLICA, topodatapb.TabletType_RDONLY: return true } return false }
go
func IsInServingGraph(tt topodatapb.TabletType) bool { switch tt { case topodatapb.TabletType_MASTER, topodatapb.TabletType_REPLICA, topodatapb.TabletType_RDONLY: return true } return false }
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// IsInServingGraph returns if a tablet appears in the serving graph
[ "IsInServingGraph", "returns", "if", "a", "tablet", "appears", "in", "the", "serving", "graph" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L58-L64
train
vitessio/vitess
go/vt/topo/tablet.go
IsRunningQueryService
func IsRunningQueryService(tt topodatapb.TabletType) bool { switch tt { case topodatapb.TabletType_MASTER, topodatapb.TabletType_REPLICA, topodatapb.TabletType_RDONLY, topodatapb.TabletType_EXPERIMENTAL, topodatapb.TabletType_DRAINED: return true } return false }
go
func IsRunningQueryService(tt topodatapb.TabletType) bool { switch tt { case topodatapb.TabletType_MASTER, topodatapb.TabletType_REPLICA, topodatapb.TabletType_RDONLY, topodatapb.TabletType_EXPERIMENTAL, topodatapb.TabletType_DRAINED: return true } return false }
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// IsRunningQueryService returns if a tablet is running the query service
[ "IsRunningQueryService", "returns", "if", "a", "tablet", "is", "running", "the", "query", "service" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L67-L73
train
vitessio/vitess
go/vt/topo/tablet.go
NewTablet
func NewTablet(uid uint32, cell, host string) *topodatapb.Tablet { return &topodatapb.Tablet{ Alias: &topodatapb.TabletAlias{ Cell: cell, Uid: uid, }, Hostname: host, PortMap: make(map[string]int32), } }
go
func NewTablet(uid uint32, cell, host string) *topodatapb.Tablet { return &topodatapb.Tablet{ Alias: &topodatapb.TabletAlias{ Cell: cell, Uid: uid, }, Hostname: host, PortMap: make(map[string]int32), } }
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// NewTablet create a new Tablet record with the given id, cell, and hostname.
[ "NewTablet", "create", "a", "new", "Tablet", "record", "with", "the", "given", "id", "cell", "and", "hostname", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L121-L130
train
vitessio/vitess
go/vt/topo/tablet.go
String
func (ti *TabletInfo) String() string { return fmt.Sprintf("Tablet{%v}", topoproto.TabletAliasString(ti.Alias)) }
go
func (ti *TabletInfo) String() string { return fmt.Sprintf("Tablet{%v}", topoproto.TabletAliasString(ti.Alias)) }
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// String returns a string describing the tablet.
[ "String", "returns", "a", "string", "describing", "the", "tablet", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L169-L171
train
vitessio/vitess
go/vt/topo/tablet.go
NewTabletInfo
func NewTabletInfo(tablet *topodatapb.Tablet, version Version) *TabletInfo { return &TabletInfo{version: version, Tablet: tablet} }
go
func NewTabletInfo(tablet *topodatapb.Tablet, version Version) *TabletInfo { return &TabletInfo{version: version, Tablet: tablet} }
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// NewTabletInfo returns a TabletInfo basing on tablet with the // version set. This function should be only used by Server // implementations.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L213-L215
train
vitessio/vitess
go/vt/topo/tablet.go
GetTablet
func (ts *Server) GetTablet(ctx context.Context, alias *topodatapb.TabletAlias) (*TabletInfo, error) { conn, err := ts.ConnForCell(ctx, alias.Cell) if err != nil { return nil, err } span, ctx := trace.NewSpan(ctx, "TopoServer.GetTablet") span.Annotate("tablet", topoproto.TabletAliasString(alias)) defer span.Finish() tabletPath := path.Join(TabletsPath, topoproto.TabletAliasString(alias), TabletFile) data, version, err := conn.Get(ctx, tabletPath) if err != nil { return nil, err } tablet := &topodatapb.Tablet{} if err := proto.Unmarshal(data, tablet); err != nil { return nil, err } return &TabletInfo{ version: version, Tablet: tablet, }, nil }
go
func (ts *Server) GetTablet(ctx context.Context, alias *topodatapb.TabletAlias) (*TabletInfo, error) { conn, err := ts.ConnForCell(ctx, alias.Cell) if err != nil { return nil, err } span, ctx := trace.NewSpan(ctx, "TopoServer.GetTablet") span.Annotate("tablet", topoproto.TabletAliasString(alias)) defer span.Finish() tabletPath := path.Join(TabletsPath, topoproto.TabletAliasString(alias), TabletFile) data, version, err := conn.Get(ctx, tabletPath) if err != nil { return nil, err } tablet := &topodatapb.Tablet{} if err := proto.Unmarshal(data, tablet); err != nil { return nil, err } return &TabletInfo{ version: version, Tablet: tablet, }, nil }
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// GetTablet is a high level function to read tablet data. // It generates trace spans.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L219-L243
train
vitessio/vitess
go/vt/topo/tablet.go
UpdateTablet
func (ts *Server) UpdateTablet(ctx context.Context, ti *TabletInfo) error { conn, err := ts.ConnForCell(ctx, ti.Tablet.Alias.Cell) if err != nil { return err } span, ctx := trace.NewSpan(ctx, "TopoServer.UpdateTablet") span.Annotate("tablet", topoproto.TabletAliasString(ti.Alias)) defer span.Finish() data, err := proto.Marshal(ti.Tablet) if err != nil { return err } tabletPath := path.Join(TabletsPath, topoproto.TabletAliasString(ti.Tablet.Alias), TabletFile) newVersion, err := conn.Update(ctx, tabletPath, data, ti.version) if err != nil { return err } ti.version = newVersion event.Dispatch(&events.TabletChange{ Tablet: *ti.Tablet, Status: "updated", }) return nil }
go
func (ts *Server) UpdateTablet(ctx context.Context, ti *TabletInfo) error { conn, err := ts.ConnForCell(ctx, ti.Tablet.Alias.Cell) if err != nil { return err } span, ctx := trace.NewSpan(ctx, "TopoServer.UpdateTablet") span.Annotate("tablet", topoproto.TabletAliasString(ti.Alias)) defer span.Finish() data, err := proto.Marshal(ti.Tablet) if err != nil { return err } tabletPath := path.Join(TabletsPath, topoproto.TabletAliasString(ti.Tablet.Alias), TabletFile) newVersion, err := conn.Update(ctx, tabletPath, data, ti.version) if err != nil { return err } ti.version = newVersion event.Dispatch(&events.TabletChange{ Tablet: *ti.Tablet, Status: "updated", }) return nil }
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// UpdateTablet updates the tablet data only - not associated replication paths. // It also uses a span, and sends the event.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L247-L273
train
vitessio/vitess
go/vt/topo/tablet.go
UpdateTabletFields
func (ts *Server) UpdateTabletFields(ctx context.Context, alias *topodatapb.TabletAlias, update func(*topodatapb.Tablet) error) (*topodatapb.Tablet, error) { span, ctx := trace.NewSpan(ctx, "TopoServer.UpdateTabletFields") span.Annotate("tablet", topoproto.TabletAliasString(alias)) defer span.Finish() for { ti, err := ts.GetTablet(ctx, alias) if err != nil { return nil, err } if err = update(ti.Tablet); err != nil { if IsErrType(err, NoUpdateNeeded) { return nil, nil } return nil, err } if err = ts.UpdateTablet(ctx, ti); !IsErrType(err, BadVersion) { return ti.Tablet, err } } }
go
func (ts *Server) UpdateTabletFields(ctx context.Context, alias *topodatapb.TabletAlias, update func(*topodatapb.Tablet) error) (*topodatapb.Tablet, error) { span, ctx := trace.NewSpan(ctx, "TopoServer.UpdateTabletFields") span.Annotate("tablet", topoproto.TabletAliasString(alias)) defer span.Finish() for { ti, err := ts.GetTablet(ctx, alias) if err != nil { return nil, err } if err = update(ti.Tablet); err != nil { if IsErrType(err, NoUpdateNeeded) { return nil, nil } return nil, err } if err = ts.UpdateTablet(ctx, ti); !IsErrType(err, BadVersion) { return ti.Tablet, err } } }
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// UpdateTabletFields is a high level helper to read a tablet record, call an // update function on it, and then write it back. If the write fails due to // a version mismatch, it will re-read the record and retry the update. // If the update succeeds, it returns the updated tablet. // If the update method returns ErrNoUpdateNeeded, nothing is written, // and nil,nil is returned.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L281-L301
train
vitessio/vitess
go/vt/topo/tablet.go
Validate
func Validate(ctx context.Context, ts *Server, tabletAlias *topodatapb.TabletAlias) error { // read the tablet record, make sure it parses tablet, err := ts.GetTablet(ctx, tabletAlias) if err != nil { return err } if !topoproto.TabletAliasEqual(tablet.Alias, tabletAlias) { return vterrors.Errorf(vtrpc.Code_INVALID_ARGUMENT, "bad tablet alias data for tablet %v: %#v", topoproto.TabletAliasString(tabletAlias), tablet.Alias) } // Validate the entry in the shard replication nodes si, err := ts.GetShardReplication(ctx, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard) if err != nil { return err } if _, err = si.GetShardReplicationNode(tabletAlias); err != nil { return vterrors.Wrapf(err, "tablet %v not found in cell %v shard replication", tabletAlias, tablet.Alias.Cell) } return nil }
go
func Validate(ctx context.Context, ts *Server, tabletAlias *topodatapb.TabletAlias) error { // read the tablet record, make sure it parses tablet, err := ts.GetTablet(ctx, tabletAlias) if err != nil { return err } if !topoproto.TabletAliasEqual(tablet.Alias, tabletAlias) { return vterrors.Errorf(vtrpc.Code_INVALID_ARGUMENT, "bad tablet alias data for tablet %v: %#v", topoproto.TabletAliasString(tabletAlias), tablet.Alias) } // Validate the entry in the shard replication nodes si, err := ts.GetShardReplication(ctx, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard) if err != nil { return err } if _, err = si.GetShardReplicationNode(tabletAlias); err != nil { return vterrors.Wrapf(err, "tablet %v not found in cell %v shard replication", tabletAlias, tablet.Alias.Cell) } return nil }
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// Validate makes sure a tablet is represented correctly in the topology server.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L304-L325
train
vitessio/vitess
go/vt/topo/tablet.go
CreateTablet
func (ts *Server) CreateTablet(ctx context.Context, tablet *topodatapb.Tablet) error { conn, err := ts.ConnForCell(ctx, tablet.Alias.Cell) if err != nil { return err } data, err := proto.Marshal(tablet) if err != nil { return err } tabletPath := path.Join(TabletsPath, topoproto.TabletAliasString(tablet.Alias), TabletFile) if _, err = conn.Create(ctx, tabletPath, data); err != nil { return err } if updateErr := UpdateTabletReplicationData(ctx, ts, tablet); updateErr != nil { return updateErr } if err == nil { event.Dispatch(&events.TabletChange{ Tablet: *tablet, Status: "created", }) } return err }
go
func (ts *Server) CreateTablet(ctx context.Context, tablet *topodatapb.Tablet) error { conn, err := ts.ConnForCell(ctx, tablet.Alias.Cell) if err != nil { return err } data, err := proto.Marshal(tablet) if err != nil { return err } tabletPath := path.Join(TabletsPath, topoproto.TabletAliasString(tablet.Alias), TabletFile) if _, err = conn.Create(ctx, tabletPath, data); err != nil { return err } if updateErr := UpdateTabletReplicationData(ctx, ts, tablet); updateErr != nil { return updateErr } if err == nil { event.Dispatch(&events.TabletChange{ Tablet: *tablet, Status: "created", }) } return err }
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// CreateTablet creates a new tablet and all associated paths for the // replication graph.
[ "CreateTablet", "creates", "a", "new", "tablet", "and", "all", "associated", "paths", "for", "the", "replication", "graph", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L329-L355
train
vitessio/vitess
go/vt/topo/tablet.go
DeleteTablet
func (ts *Server) DeleteTablet(ctx context.Context, tabletAlias *topodatapb.TabletAlias) error { conn, err := ts.ConnForCell(ctx, tabletAlias.Cell) if err != nil { return err } // get the current tablet record, if any, to log the deletion ti, tErr := ts.GetTablet(ctx, tabletAlias) tabletPath := path.Join(TabletsPath, topoproto.TabletAliasString(tabletAlias), TabletFile) if err := conn.Delete(ctx, tabletPath, nil); err != nil { return err } // Only try to log if we have the required info. if tErr == nil { // Only copy the identity info for the tablet. The rest has been deleted. event.Dispatch(&events.TabletChange{ Tablet: topodatapb.Tablet{ Alias: tabletAlias, Keyspace: ti.Tablet.Keyspace, Shard: ti.Tablet.Shard, }, Status: "deleted", }) } return nil }
go
func (ts *Server) DeleteTablet(ctx context.Context, tabletAlias *topodatapb.TabletAlias) error { conn, err := ts.ConnForCell(ctx, tabletAlias.Cell) if err != nil { return err } // get the current tablet record, if any, to log the deletion ti, tErr := ts.GetTablet(ctx, tabletAlias) tabletPath := path.Join(TabletsPath, topoproto.TabletAliasString(tabletAlias), TabletFile) if err := conn.Delete(ctx, tabletPath, nil); err != nil { return err } // Only try to log if we have the required info. if tErr == nil { // Only copy the identity info for the tablet. The rest has been deleted. event.Dispatch(&events.TabletChange{ Tablet: topodatapb.Tablet{ Alias: tabletAlias, Keyspace: ti.Tablet.Keyspace, Shard: ti.Tablet.Shard, }, Status: "deleted", }) } return nil }
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// DeleteTablet wraps the underlying conn.Delete // and dispatches the event.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L359-L386
train
vitessio/vitess
go/vt/topo/tablet.go
UpdateTabletReplicationData
func UpdateTabletReplicationData(ctx context.Context, ts *Server, tablet *topodatapb.Tablet) error { return UpdateShardReplicationRecord(ctx, ts, tablet.Keyspace, tablet.Shard, tablet.Alias) }
go
func UpdateTabletReplicationData(ctx context.Context, ts *Server, tablet *topodatapb.Tablet) error { return UpdateShardReplicationRecord(ctx, ts, tablet.Keyspace, tablet.Shard, tablet.Alias) }
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// UpdateTabletReplicationData creates or updates the replication // graph data for a tablet
[ "UpdateTabletReplicationData", "creates", "or", "updates", "the", "replication", "graph", "data", "for", "a", "tablet" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L390-L392
train
vitessio/vitess
go/vt/topo/tablet.go
DeleteTabletReplicationData
func DeleteTabletReplicationData(ctx context.Context, ts *Server, tablet *topodatapb.Tablet) error { return RemoveShardReplicationRecord(ctx, ts, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard, tablet.Alias) }
go
func DeleteTabletReplicationData(ctx context.Context, ts *Server, tablet *topodatapb.Tablet) error { return RemoveShardReplicationRecord(ctx, ts, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard, tablet.Alias) }
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// DeleteTabletReplicationData deletes replication data.
[ "DeleteTabletReplicationData", "deletes", "replication", "data", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/topo/tablet.go#L395-L397
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
NewTxPool
func NewTxPool( prefix string, capacity int, foundRowsCapacity int, timeout time.Duration, idleTimeout time.Duration, waiterCap int, checker connpool.MySQLChecker, limiter txlimiter.TxLimiter) *TxPool { axp := &TxPool{ conns: connpool.New(prefix+"TransactionPool", capacity, idleTimeout, checker), foundRowsPool: connpool.New(prefix+"FoundRowsPool", foundRowsCapacity, idleTimeout, checker), activePool: pools.NewNumbered(), lastID: sync2.NewAtomicInt64(time.Now().UnixNano()), timeout: sync2.NewAtomicDuration(timeout), waiterCap: sync2.NewAtomicInt64(int64(waiterCap)), waiters: sync2.NewAtomicInt64(0), ticks: timer.NewTimer(timeout / 10), checker: checker, limiter: limiter, } txOnce.Do(func() { // Careful: conns also exports name+"xxx" vars, // but we know it doesn't export Timeout. stats.NewGaugeDurationFunc(prefix+"TransactionPoolTimeout", "Transaction pool timeout", axp.timeout.Get) stats.NewGaugeFunc(prefix+"TransactionPoolWaiters", "Transaction pool waiters", axp.waiters.Get) }) return axp }
go
func NewTxPool( prefix string, capacity int, foundRowsCapacity int, timeout time.Duration, idleTimeout time.Duration, waiterCap int, checker connpool.MySQLChecker, limiter txlimiter.TxLimiter) *TxPool { axp := &TxPool{ conns: connpool.New(prefix+"TransactionPool", capacity, idleTimeout, checker), foundRowsPool: connpool.New(prefix+"FoundRowsPool", foundRowsCapacity, idleTimeout, checker), activePool: pools.NewNumbered(), lastID: sync2.NewAtomicInt64(time.Now().UnixNano()), timeout: sync2.NewAtomicDuration(timeout), waiterCap: sync2.NewAtomicInt64(int64(waiterCap)), waiters: sync2.NewAtomicInt64(0), ticks: timer.NewTimer(timeout / 10), checker: checker, limiter: limiter, } txOnce.Do(func() { // Careful: conns also exports name+"xxx" vars, // but we know it doesn't export Timeout. stats.NewGaugeDurationFunc(prefix+"TransactionPoolTimeout", "Transaction pool timeout", axp.timeout.Get) stats.NewGaugeFunc(prefix+"TransactionPoolWaiters", "Transaction pool waiters", axp.waiters.Get) }) return axp }
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// NewTxPool creates a new TxPool. It's not operational until it's Open'd.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L106-L134
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
Open
func (axp *TxPool) Open(appParams, dbaParams, appDebugParams *mysql.ConnParams) { log.Infof("Starting transaction id: %d", axp.lastID) axp.conns.Open(appParams, dbaParams, appDebugParams) foundRowsParam := *appParams foundRowsParam.EnableClientFoundRows() axp.foundRowsPool.Open(&foundRowsParam, dbaParams, appDebugParams) axp.ticks.Start(func() { axp.transactionKiller() }) }
go
func (axp *TxPool) Open(appParams, dbaParams, appDebugParams *mysql.ConnParams) { log.Infof("Starting transaction id: %d", axp.lastID) axp.conns.Open(appParams, dbaParams, appDebugParams) foundRowsParam := *appParams foundRowsParam.EnableClientFoundRows() axp.foundRowsPool.Open(&foundRowsParam, dbaParams, appDebugParams) axp.ticks.Start(func() { axp.transactionKiller() }) }
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// Open makes the TxPool operational. This also starts the transaction killer // that will kill long-running transactions.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L138-L145
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
Close
func (axp *TxPool) Close() { axp.ticks.Stop() for _, v := range axp.activePool.GetOutdated(time.Duration(0), "for closing") { conn := v.(*TxConnection) log.Warningf("killing transaction for shutdown: %s", conn.Format(nil)) tabletenv.InternalErrors.Add("StrayTransactions", 1) conn.Close() conn.conclude(TxClose, "pool closed") } axp.conns.Close() axp.foundRowsPool.Close() }
go
func (axp *TxPool) Close() { axp.ticks.Stop() for _, v := range axp.activePool.GetOutdated(time.Duration(0), "for closing") { conn := v.(*TxConnection) log.Warningf("killing transaction for shutdown: %s", conn.Format(nil)) tabletenv.InternalErrors.Add("StrayTransactions", 1) conn.Close() conn.conclude(TxClose, "pool closed") } axp.conns.Close() axp.foundRowsPool.Close() }
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// Close closes the TxPool. A closed pool can be reopened.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L148-L159
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
AdjustLastID
func (axp *TxPool) AdjustLastID(id int64) { if current := axp.lastID.Get(); current < id { log.Infof("Adjusting transaction id to: %d", id) axp.lastID.Set(id) } }
go
func (axp *TxPool) AdjustLastID(id int64) { if current := axp.lastID.Get(); current < id { log.Infof("Adjusting transaction id to: %d", id) axp.lastID.Set(id) } }
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// AdjustLastID adjusts the last transaction id to be at least // as large as the input value. This will ensure that there are // no dtid collisions with future transactions.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L164-L169
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
RollbackNonBusy
func (axp *TxPool) RollbackNonBusy(ctx context.Context) { for _, v := range axp.activePool.GetOutdated(time.Duration(0), "for transition") { axp.LocalConclude(ctx, v.(*TxConnection)) } }
go
func (axp *TxPool) RollbackNonBusy(ctx context.Context) { for _, v := range axp.activePool.GetOutdated(time.Duration(0), "for transition") { axp.LocalConclude(ctx, v.(*TxConnection)) } }
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// RollbackNonBusy rolls back all transactions that are not in use. // Transactions can be in use for situations like executing statements // or in prepared state.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L174-L178
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
Get
func (axp *TxPool) Get(transactionID int64, reason string) (*TxConnection, error) { v, err := axp.activePool.Get(transactionID, reason) if err != nil { return nil, vterrors.Errorf(vtrpcpb.Code_ABORTED, "transaction %d: %v", transactionID, err) } return v.(*TxConnection), nil }
go
func (axp *TxPool) Get(transactionID int64, reason string) (*TxConnection, error) { v, err := axp.activePool.Get(transactionID, reason) if err != nil { return nil, vterrors.Errorf(vtrpcpb.Code_ABORTED, "transaction %d: %v", transactionID, err) } return v.(*TxConnection), nil }
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// Get fetches the connection associated to the transactionID. // You must call Recycle on TxConnection once done.
[ "Get", "fetches", "the", "connection", "associated", "to", "the", "transactionID", ".", "You", "must", "call", "Recycle", "on", "TxConnection", "once", "done", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L311-L317
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
LocalBegin
func (axp *TxPool) LocalBegin(ctx context.Context, options *querypb.ExecuteOptions) (*TxConnection, string, error) { span, ctx := trace.NewSpan(ctx, "TxPool.LocalBegin") defer span.Finish() transactionID, beginSQL, err := axp.Begin(ctx, options) if err != nil { return nil, "", err } conn, err := axp.Get(transactionID, "for local query") return conn, beginSQL, err }
go
func (axp *TxPool) LocalBegin(ctx context.Context, options *querypb.ExecuteOptions) (*TxConnection, string, error) { span, ctx := trace.NewSpan(ctx, "TxPool.LocalBegin") defer span.Finish() transactionID, beginSQL, err := axp.Begin(ctx, options) if err != nil { return nil, "", err } conn, err := axp.Get(transactionID, "for local query") return conn, beginSQL, err }
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// LocalBegin is equivalent to Begin->Get. // It's used for executing transactions within a request. It's safe // to always call LocalConclude at the end.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L322-L332
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
LocalCommit
func (axp *TxPool) LocalCommit(ctx context.Context, conn *TxConnection, mc messageCommitter) (string, error) { span, ctx := trace.NewSpan(ctx, "TxPool.LocalCommit") defer span.Finish() defer conn.conclude(TxCommit, "transaction committed") defer mc.LockDB(conn.NewMessages, conn.ChangedMessages)() if conn.Autocommit { mc.UpdateCaches(conn.NewMessages, conn.ChangedMessages) return "", nil } if _, err := conn.Exec(ctx, "commit", 1, false); err != nil { conn.Close() return "", err } mc.UpdateCaches(conn.NewMessages, conn.ChangedMessages) return "commit", nil }
go
func (axp *TxPool) LocalCommit(ctx context.Context, conn *TxConnection, mc messageCommitter) (string, error) { span, ctx := trace.NewSpan(ctx, "TxPool.LocalCommit") defer span.Finish() defer conn.conclude(TxCommit, "transaction committed") defer mc.LockDB(conn.NewMessages, conn.ChangedMessages)() if conn.Autocommit { mc.UpdateCaches(conn.NewMessages, conn.ChangedMessages) return "", nil } if _, err := conn.Exec(ctx, "commit", 1, false); err != nil { conn.Close() return "", err } mc.UpdateCaches(conn.NewMessages, conn.ChangedMessages) return "commit", nil }
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// LocalCommit is the commit function for LocalBegin.
[ "LocalCommit", "is", "the", "commit", "function", "for", "LocalBegin", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L335-L352
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
LocalConclude
func (axp *TxPool) LocalConclude(ctx context.Context, conn *TxConnection) { span, ctx := trace.NewSpan(ctx, "TxPool.LocalConclude") defer span.Finish() if conn.DBConn != nil { _ = axp.localRollback(ctx, conn) } }
go
func (axp *TxPool) LocalConclude(ctx context.Context, conn *TxConnection) { span, ctx := trace.NewSpan(ctx, "TxPool.LocalConclude") defer span.Finish() if conn.DBConn != nil { _ = axp.localRollback(ctx, conn) } }
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// LocalConclude concludes a transaction started by LocalBegin. // If the transaction was not previously concluded, it's rolled back.
[ "LocalConclude", "concludes", "a", "transaction", "started", "by", "LocalBegin", ".", "If", "the", "transaction", "was", "not", "previously", "concluded", "it", "s", "rolled", "back", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L356-L362
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
LogActive
func (axp *TxPool) LogActive() { axp.logMu.Lock() defer axp.logMu.Unlock() if time.Since(axp.lastLog) < txLogInterval { return } axp.lastLog = time.Now() conns := axp.activePool.GetAll() for _, c := range conns { c.(*TxConnection).LogToFile.Set(1) } }
go
func (axp *TxPool) LogActive() { axp.logMu.Lock() defer axp.logMu.Unlock() if time.Since(axp.lastLog) < txLogInterval { return } axp.lastLog = time.Now() conns := axp.activePool.GetAll() for _, c := range conns { c.(*TxConnection).LogToFile.Set(1) } }
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// LogActive causes all existing transactions to be logged when they complete. // The logging is throttled to no more than once every txLogInterval.
[ "LogActive", "causes", "all", "existing", "transactions", "to", "be", "logged", "when", "they", "complete", ".", "The", "logging", "is", "throttled", "to", "no", "more", "than", "once", "every", "txLogInterval", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L375-L386
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
SetTimeout
func (axp *TxPool) SetTimeout(timeout time.Duration) { axp.timeout.Set(timeout) axp.ticks.SetInterval(timeout / 10) }
go
func (axp *TxPool) SetTimeout(timeout time.Duration) { axp.timeout.Set(timeout) axp.ticks.SetInterval(timeout / 10) }
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// SetTimeout sets the transaction timeout.
[ "SetTimeout", "sets", "the", "transaction", "timeout", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L394-L397
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
Exec
func (txc *TxConnection) Exec(ctx context.Context, query string, maxrows int, wantfields bool) (*sqltypes.Result, error) { r, err := txc.DBConn.ExecOnce(ctx, query, maxrows, wantfields) if err != nil { if mysql.IsConnErr(err) { select { case <-ctx.Done(): // If the context is done, the query was killed. // So, don't trigger a mysql check. default: txc.pool.checker.CheckMySQL() } } return nil, err } return r, nil }
go
func (txc *TxConnection) Exec(ctx context.Context, query string, maxrows int, wantfields bool) (*sqltypes.Result, error) { r, err := txc.DBConn.ExecOnce(ctx, query, maxrows, wantfields) if err != nil { if mysql.IsConnErr(err) { select { case <-ctx.Done(): // If the context is done, the query was killed. // So, don't trigger a mysql check. default: txc.pool.checker.CheckMySQL() } } return nil, err } return r, nil }
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// Exec executes the statement for the current transaction.
[ "Exec", "executes", "the", "statement", "for", "the", "current", "transaction", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L433-L448
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
BeginAgain
func (txc *TxConnection) BeginAgain(ctx context.Context) error { if _, err := txc.DBConn.Exec(ctx, "commit", 1, false); err != nil { return err } if _, err := txc.DBConn.Exec(ctx, "begin", 1, false); err != nil { return err } return nil }
go
func (txc *TxConnection) BeginAgain(ctx context.Context) error { if _, err := txc.DBConn.Exec(ctx, "commit", 1, false); err != nil { return err } if _, err := txc.DBConn.Exec(ctx, "begin", 1, false); err != nil { return err } return nil }
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// BeginAgain commits the existing transaction and begins a new one
[ "BeginAgain", "commits", "the", "existing", "transaction", "and", "begins", "a", "new", "one" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L451-L459
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
Recycle
func (txc *TxConnection) Recycle() { if txc.IsClosed() { txc.conclude(TxClose, "closed") } else { txc.pool.activePool.Put(txc.TransactionID) } }
go
func (txc *TxConnection) Recycle() { if txc.IsClosed() { txc.conclude(TxClose, "closed") } else { txc.pool.activePool.Put(txc.TransactionID) } }
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// Recycle returns the connection to the pool. The transaction remains // active.
[ "Recycle", "returns", "the", "connection", "to", "the", "pool", ".", "The", "transaction", "remains", "active", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L463-L469
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
RecordQuery
func (txc *TxConnection) RecordQuery(query string) { txc.Queries = append(txc.Queries, query) }
go
func (txc *TxConnection) RecordQuery(query string) { txc.Queries = append(txc.Queries, query) }
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// RecordQuery records the query against this transaction.
[ "RecordQuery", "records", "the", "query", "against", "this", "transaction", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L472-L474
train
vitessio/vitess
go/vt/vttablet/tabletserver/tx_pool.go
Format
func (txc *TxConnection) Format(params url.Values) string { return fmt.Sprintf( "%v\t'%v'\t'%v'\t%v\t%v\t%.6f\t%v\t%v\t\n", txc.TransactionID, callerid.GetPrincipal(txc.EffectiveCallerID), callerid.GetUsername(txc.ImmediateCallerID), txc.StartTime.Format(time.StampMicro), txc.EndTime.Format(time.StampMicro), txc.EndTime.Sub(txc.StartTime).Seconds(), txc.Conclusion, strings.Join(txc.Queries, ";"), ) }
go
func (txc *TxConnection) Format(params url.Values) string { return fmt.Sprintf( "%v\t'%v'\t'%v'\t%v\t%v\t%.6f\t%v\t%v\t\n", txc.TransactionID, callerid.GetPrincipal(txc.EffectiveCallerID), callerid.GetUsername(txc.ImmediateCallerID), txc.StartTime.Format(time.StampMicro), txc.EndTime.Format(time.StampMicro), txc.EndTime.Sub(txc.StartTime).Seconds(), txc.Conclusion, strings.Join(txc.Queries, ";"), ) }
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// Format returns a printable version of the connection info.
[ "Format", "returns", "a", "printable", "version", "of", "the", "connection", "info", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletserver/tx_pool.go#L508-L520
train
vitessio/vitess
go/vt/vttablet/tabletmanager/restore.go
RestoreData
func (agent *ActionAgent) RestoreData(ctx context.Context, logger logutil.Logger, deleteBeforeRestore bool) error { if err := agent.lock(ctx); err != nil { return err } defer agent.unlock() if agent.Cnf == nil { return fmt.Errorf("cannot perform restore without my.cnf, please restart vttablet with a my.cnf file specified") } return agent.restoreDataLocked(ctx, logger, deleteBeforeRestore) }
go
func (agent *ActionAgent) RestoreData(ctx context.Context, logger logutil.Logger, deleteBeforeRestore bool) error { if err := agent.lock(ctx); err != nil { return err } defer agent.unlock() if agent.Cnf == nil { return fmt.Errorf("cannot perform restore without my.cnf, please restart vttablet with a my.cnf file specified") } return agent.restoreDataLocked(ctx, logger, deleteBeforeRestore) }
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// RestoreData is the main entry point for backup restore. // It will either work, fail gracefully, or return // an error in case of a non-recoverable error. // It takes the action lock so no RPC interferes.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/tabletmanager/restore.go#L48-L57
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
newSymtab
func newSymtab() *symtab { return &symtab{ tables: make(map[sqlparser.TableName]*table), uniqueColumns: make(map[string]*column), } }
go
func newSymtab() *symtab { return &symtab{ tables: make(map[sqlparser.TableName]*table), uniqueColumns: make(map[string]*column), } }
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// newSymtab creates a new symtab.
[ "newSymtab", "creates", "a", "new", "symtab", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L70-L75
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
newSymtabWithRoute
func newSymtabWithRoute(rb *route) *symtab { return &symtab{ tables: make(map[sqlparser.TableName]*table), uniqueColumns: make(map[string]*column), singleRoute: rb, } }
go
func newSymtabWithRoute(rb *route) *symtab { return &symtab{ tables: make(map[sqlparser.TableName]*table), uniqueColumns: make(map[string]*column), singleRoute: rb, } }
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// newSymtab creates a new symtab initialized // to contain just one route.
[ "newSymtab", "creates", "a", "new", "symtab", "initialized", "to", "contain", "just", "one", "route", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L79-L85
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
AddVSchemaTable
func (st *symtab) AddVSchemaTable(alias sqlparser.TableName, vschemaTables []*vindexes.Table, rb *route) (vindexMaps []map[*column]vindexes.Vindex, err error) { t := &table{ alias: alias, origin: rb, } vindexMaps = make([]map[*column]vindexes.Vindex, len(vschemaTables)) for i, vst := range vschemaTables { // If any input is authoritative, we make the table authoritative. // TODO(sougou): vschema builder should validate that authoritative columns match. if vst.ColumnListAuthoritative { t.isAuthoritative = true } for _, col := range vst.Columns { t.addColumn(col.Name, &column{ origin: rb, st: st, typ: col.Type, }) } var vindexMap map[*column]vindexes.Vindex for _, cv := range vst.ColumnVindexes { for i, cvcol := range cv.Columns { col, ok := t.columns[cvcol.Lowered()] if !ok { col = &column{ origin: rb, st: st, } t.addColumn(cvcol, col) } if i == 0 { // For now, only the first column is used for vindex Map functions. if vindexMap == nil { vindexMap = make(map[*column]vindexes.Vindex) } vindexMap[col] = cv.Vindex } } } vindexMaps[i] = vindexMap if ai := vst.AutoIncrement; ai != nil { if _, ok := t.columns[ai.Column.Lowered()]; !ok { t.addColumn(ai.Column, &column{ origin: rb, st: st, }) } } } if err := st.AddTable(t); err != nil { return nil, err } return vindexMaps, nil }
go
func (st *symtab) AddVSchemaTable(alias sqlparser.TableName, vschemaTables []*vindexes.Table, rb *route) (vindexMaps []map[*column]vindexes.Vindex, err error) { t := &table{ alias: alias, origin: rb, } vindexMaps = make([]map[*column]vindexes.Vindex, len(vschemaTables)) for i, vst := range vschemaTables { // If any input is authoritative, we make the table authoritative. // TODO(sougou): vschema builder should validate that authoritative columns match. if vst.ColumnListAuthoritative { t.isAuthoritative = true } for _, col := range vst.Columns { t.addColumn(col.Name, &column{ origin: rb, st: st, typ: col.Type, }) } var vindexMap map[*column]vindexes.Vindex for _, cv := range vst.ColumnVindexes { for i, cvcol := range cv.Columns { col, ok := t.columns[cvcol.Lowered()] if !ok { col = &column{ origin: rb, st: st, } t.addColumn(cvcol, col) } if i == 0 { // For now, only the first column is used for vindex Map functions. if vindexMap == nil { vindexMap = make(map[*column]vindexes.Vindex) } vindexMap[col] = cv.Vindex } } } vindexMaps[i] = vindexMap if ai := vst.AutoIncrement; ai != nil { if _, ok := t.columns[ai.Column.Lowered()]; !ok { t.addColumn(ai.Column, &column{ origin: rb, st: st, }) } } } if err := st.AddTable(t); err != nil { return nil, err } return vindexMaps, nil }
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// AddVSchemaTable takes a list of vschema tables as input and // creates a table with multiple route options. It returns a // list of vindex maps, one for each input.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L90-L148
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
Merge
func (st *symtab) Merge(newsyms *symtab) error { if st.tableNames == nil || newsyms.tableNames == nil { // If any side of symtab has anonymous tables, // we treat the merged symtab as having anonymous tables. return nil } for _, t := range newsyms.tables { if err := st.AddTable(t); err != nil { return err } } return nil }
go
func (st *symtab) Merge(newsyms *symtab) error { if st.tableNames == nil || newsyms.tableNames == nil { // If any side of symtab has anonymous tables, // we treat the merged symtab as having anonymous tables. return nil } for _, t := range newsyms.tables { if err := st.AddTable(t); err != nil { return err } } return nil }
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// Merge merges the new symtab into the current one. // Duplicate table aliases return an error. // uniqueColumns is updated, but duplicates are removed. // Merges are only performed during the FROM clause analysis. // At this point, only tables and uniqueColumns are set. // All other fields are ignored.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L156-L168
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
AddTable
func (st *symtab) AddTable(t *table) error { if rb, ok := t.origin.(*route); !ok || rb.Resolve() != st.singleRoute { st.singleRoute = nil } if _, ok := st.tables[t.alias]; ok { return fmt.Errorf("duplicate symbol: %s", sqlparser.String(t.alias)) } st.tables[t.alias] = t st.tableNames = append(st.tableNames, t.alias) // update the uniqueColumns list, and eliminate // duplicate symbols if found. for colname, c := range t.columns { c.st = st if _, ok := st.uniqueColumns[colname]; ok { // Keep the entry, but make it nil. This will // ensure that yet another column of the same name // doesn't get added back in. st.uniqueColumns[colname] = nil continue } st.uniqueColumns[colname] = c } return nil }
go
func (st *symtab) AddTable(t *table) error { if rb, ok := t.origin.(*route); !ok || rb.Resolve() != st.singleRoute { st.singleRoute = nil } if _, ok := st.tables[t.alias]; ok { return fmt.Errorf("duplicate symbol: %s", sqlparser.String(t.alias)) } st.tables[t.alias] = t st.tableNames = append(st.tableNames, t.alias) // update the uniqueColumns list, and eliminate // duplicate symbols if found. for colname, c := range t.columns { c.st = st if _, ok := st.uniqueColumns[colname]; ok { // Keep the entry, but make it nil. This will // ensure that yet another column of the same name // doesn't get added back in. st.uniqueColumns[colname] = nil continue } st.uniqueColumns[colname] = c } return nil }
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// AddTable adds a table to symtab.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L171-L195
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
AllTables
func (st *symtab) AllTables() []*table { if len(st.tableNames) == 0 { return nil } tables := make([]*table, 0, len(st.tableNames)) for _, tname := range st.tableNames { tables = append(tables, st.tables[tname]) } return tables }
go
func (st *symtab) AllTables() []*table { if len(st.tableNames) == 0 { return nil } tables := make([]*table, 0, len(st.tableNames)) for _, tname := range st.tableNames { tables = append(tables, st.tables[tname]) } return tables }
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// AllTables returns an ordered list of all current tables.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L198-L207
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
SetResultColumns
func (st *symtab) SetResultColumns(rcs []*resultColumn) { for _, rc := range rcs { rc.column.st = st } st.ResultColumns = rcs }
go
func (st *symtab) SetResultColumns(rcs []*resultColumn) { for _, rc := range rcs { rc.column.st = st } st.ResultColumns = rcs }
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// SetResultColumns sets the result columns.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L229-L234
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
searchResultColumn
func (st *symtab) searchResultColumn(col *sqlparser.ColName) (c *column, err error) { var cursym *resultColumn for _, rc := range st.ResultColumns { if rc.alias.Equal(col.Name) { if cursym != nil { return nil, fmt.Errorf("ambiguous symbol reference: %v", sqlparser.String(col)) } cursym = rc } } if cursym != nil { return cursym.column, nil } return nil, nil }
go
func (st *symtab) searchResultColumn(col *sqlparser.ColName) (c *column, err error) { var cursym *resultColumn for _, rc := range st.ResultColumns { if rc.alias.Equal(col.Name) { if cursym != nil { return nil, fmt.Errorf("ambiguous symbol reference: %v", sqlparser.String(col)) } cursym = rc } } if cursym != nil { return cursym.column, nil } return nil, nil }
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// searchResultColumn looks for col in the results columns.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L312-L326
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
searchTables
func (st *symtab) searchTables(col *sqlparser.ColName) (*column, error) { var t *table // @@ syntax is only allowed for dual tables, in which case there should be // only one in the symtab. So, such expressions will be implicitly matched. if col.Qualifier.IsEmpty() || strings.HasPrefix(col.Qualifier.Name.String(), "@@") { // Search uniqueColumns first. If found, our job is done. // Check for nil because there can be nil entries if there // are duplicate columns across multiple tables. if c := st.uniqueColumns[col.Name.Lowered()]; c != nil { return c, nil } switch { case len(st.tables) == 1: // If there's only one table match against it. // Loop executes once to match the only table. for _, v := range st.tables { t = v } // No return: break out. case st.singleRoute != nil: // If there's only one route, create an anonymous symbol. return &column{origin: st.singleRoute, st: st}, nil default: // If none of the above, the symbol is unresolvable. return nil, fmt.Errorf("symbol %s not found", sqlparser.String(col)) } } else { var ok bool t, ok = st.tables[col.Qualifier] if !ok { return nil, nil } } // At this point, t should be set. c, ok := t.columns[col.Name.Lowered()] if !ok { // We know all the column names of a subquery. Might as well return an error if it's not found. if t.isAuthoritative { return nil, fmt.Errorf("symbol %s not found in table or subquery", sqlparser.String(col)) } c = &column{ origin: t.Origin(), st: st, } t.addColumn(col.Name, c) } return c, nil }
go
func (st *symtab) searchTables(col *sqlparser.ColName) (*column, error) { var t *table // @@ syntax is only allowed for dual tables, in which case there should be // only one in the symtab. So, such expressions will be implicitly matched. if col.Qualifier.IsEmpty() || strings.HasPrefix(col.Qualifier.Name.String(), "@@") { // Search uniqueColumns first. If found, our job is done. // Check for nil because there can be nil entries if there // are duplicate columns across multiple tables. if c := st.uniqueColumns[col.Name.Lowered()]; c != nil { return c, nil } switch { case len(st.tables) == 1: // If there's only one table match against it. // Loop executes once to match the only table. for _, v := range st.tables { t = v } // No return: break out. case st.singleRoute != nil: // If there's only one route, create an anonymous symbol. return &column{origin: st.singleRoute, st: st}, nil default: // If none of the above, the symbol is unresolvable. return nil, fmt.Errorf("symbol %s not found", sqlparser.String(col)) } } else { var ok bool t, ok = st.tables[col.Qualifier] if !ok { return nil, nil } } // At this point, t should be set. c, ok := t.columns[col.Name.Lowered()] if !ok { // We know all the column names of a subquery. Might as well return an error if it's not found. if t.isAuthoritative { return nil, fmt.Errorf("symbol %s not found in table or subquery", sqlparser.String(col)) } c = &column{ origin: t.Origin(), st: st, } t.addColumn(col.Name, c) } return c, nil }
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// searchTables looks for the column in the tables. The search order // is as described in Find.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L330-L379
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
ResultFromNumber
func ResultFromNumber(rcs []*resultColumn, val *sqlparser.SQLVal) (int, error) { if val.Type != sqlparser.IntVal { return 0, errors.New("column number is not an int") } num, err := strconv.ParseInt(string(val.Val), 0, 64) if err != nil { return 0, fmt.Errorf("error parsing column number: %s", sqlparser.String(val)) } if num < 1 || num > int64(len(rcs)) { return 0, fmt.Errorf("column number out of range: %d", num) } return int(num - 1), nil }
go
func ResultFromNumber(rcs []*resultColumn, val *sqlparser.SQLVal) (int, error) { if val.Type != sqlparser.IntVal { return 0, errors.New("column number is not an int") } num, err := strconv.ParseInt(string(val.Val), 0, 64) if err != nil { return 0, fmt.Errorf("error parsing column number: %s", sqlparser.String(val)) } if num < 1 || num > int64(len(rcs)) { return 0, fmt.Errorf("column number out of range: %d", num) } return int(num - 1), nil }
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// ResultFromNumber returns the result column index based on the column // order expression.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L383-L395
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
ResolveSymbols
func (st *symtab) ResolveSymbols(node sqlparser.SQLNode) error { return sqlparser.Walk(func(node sqlparser.SQLNode) (kontinue bool, err error) { switch node := node.(type) { case *sqlparser.ColName: if _, _, err := st.Find(node); err != nil { return false, err } case *sqlparser.Subquery: return false, errors.New("subqueries disallowed") } return true, nil }, node) }
go
func (st *symtab) ResolveSymbols(node sqlparser.SQLNode) error { return sqlparser.Walk(func(node sqlparser.SQLNode) (kontinue bool, err error) { switch node := node.(type) { case *sqlparser.ColName: if _, _, err := st.Find(node); err != nil { return false, err } case *sqlparser.Subquery: return false, errors.New("subqueries disallowed") } return true, nil }, node) }
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// ResolveSymbols resolves all column references against symtab. // This makes sure that they all have their Metadata initialized. // If a symbol cannot be resolved or if the expression contains // a subquery, an error is returned.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L401-L413
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
Origin
func (t *table) Origin() builder { // If it's a route, we have to resolve it. if rb, ok := t.origin.(*route); ok { return rb.Resolve() } return t.origin }
go
func (t *table) Origin() builder { // If it's a route, we have to resolve it. if rb, ok := t.origin.(*route); ok { return rb.Resolve() } return t.origin }
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// Origin returns the route that originates the table.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L440-L446
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
Origin
func (c *column) Origin() builder { // If it's a route, we have to resolve it. if rb, ok := c.origin.(*route); ok { return rb.Resolve() } return c.origin }
go
func (c *column) Origin() builder { // If it's a route, we have to resolve it. if rb, ok := c.origin.(*route); ok { return rb.Resolve() } return c.origin }
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// Origin returns the route that originates the column.
[ "Origin", "returns", "the", "route", "that", "originates", "the", "column", "." ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L464-L470
train
vitessio/vitess
go/vt/vtgate/planbuilder/symtab.go
newResultColumn
func newResultColumn(expr *sqlparser.AliasedExpr, origin builder) *resultColumn { rc := &resultColumn{ alias: expr.As, } if col, ok := expr.Expr.(*sqlparser.ColName); ok { // If no alias was specified, then the base name // of the column becomes the alias. if rc.alias.IsEmpty() { rc.alias = col.Name } // If it's a col it should already have metadata. rc.column = col.Metadata.(*column) } else { // We don't generate an alias if the expression is non-trivial. // Just to be safe, generate an anonymous column for the expression. rc.column = &column{ origin: origin, } } return rc }
go
func newResultColumn(expr *sqlparser.AliasedExpr, origin builder) *resultColumn { rc := &resultColumn{ alias: expr.As, } if col, ok := expr.Expr.(*sqlparser.ColName); ok { // If no alias was specified, then the base name // of the column becomes the alias. if rc.alias.IsEmpty() { rc.alias = col.Name } // If it's a col it should already have metadata. rc.column = col.Metadata.(*column) } else { // We don't generate an alias if the expression is non-trivial. // Just to be safe, generate an anonymous column for the expression. rc.column = &column{ origin: origin, } } return rc }
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// NewResultColumn creates a new resultColumn based on the supplied expression. // The created symbol is not remembered until it is later set as ResultColumns // after all select expressions are analyzed.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vtgate/planbuilder/symtab.go#L489-L509
train
vitessio/vitess
go/trace/trace.go
NewSpan
func NewSpan(inCtx context.Context, label string) (Span, context.Context) { parent, _ := spanFactory.FromContext(inCtx) span := spanFactory.New(parent, label) outCtx := spanFactory.NewContext(inCtx, span) return span, outCtx }
go
func NewSpan(inCtx context.Context, label string) (Span, context.Context) { parent, _ := spanFactory.FromContext(inCtx) span := spanFactory.New(parent, label) outCtx := spanFactory.NewContext(inCtx, span) return span, outCtx }
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// NewSpan creates a new Span with the currently installed tracing plugin. // If no tracing plugin is installed, it returns a fake Span that does nothing.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/trace/trace.go#L47-L53
train
vitessio/vitess
go/trace/trace.go
NewContext
func NewContext(parent context.Context, span Span) context.Context { return spanFactory.NewContext(parent, span) }
go
func NewContext(parent context.Context, span Span) context.Context { return spanFactory.NewContext(parent, span) }
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// NewContext returns a context based on parent with a new Span value.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/trace/trace.go#L68-L70
train
vitessio/vitess
go/trace/trace.go
CopySpan
func CopySpan(parentCtx, spanCtx context.Context) context.Context { if span, ok := FromContext(spanCtx); ok { return NewContext(parentCtx, span) } return parentCtx }
go
func CopySpan(parentCtx, spanCtx context.Context) context.Context { if span, ok := FromContext(spanCtx); ok { return NewContext(parentCtx, span) } return parentCtx }
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// CopySpan creates a new context from parentCtx, with only the trace span // copied over from spanCtx, if it has any. If not, parentCtx is returned.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/trace/trace.go#L74-L79
train
vitessio/vitess
go/trace/trace.go
StartTracing
func StartTracing(serviceName string) io.Closer { factory, ok := tracingBackendFactories[*tracingServer] if !ok { return fail(serviceName) } tracer, closer, err := factory(serviceName) if err != nil { log.Error(vterrors.Wrapf(err, "failed to create a %s tracer", *tracingServer)) return &nilCloser{} } spanFactory = tracer log.Infof("successfully started tracing with [%s]", *tracingServer) return closer }
go
func StartTracing(serviceName string) io.Closer { factory, ok := tracingBackendFactories[*tracingServer] if !ok { return fail(serviceName) } tracer, closer, err := factory(serviceName) if err != nil { log.Error(vterrors.Wrapf(err, "failed to create a %s tracer", *tracingServer)) return &nilCloser{} } spanFactory = tracer log.Infof("successfully started tracing with [%s]", *tracingServer) return closer }
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// StartTracing enables tracing for a named service
[ "StartTracing", "enables", "tracing", "for", "a", "named", "service" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/trace/trace.go#L119-L136
train
vitessio/vitess
go/vt/worker/clone_utils.go
makeValueString
func makeValueString(fields []*querypb.Field, rows [][]sqltypes.Value) string { buf := bytes.Buffer{} for i, row := range rows { if i > 0 { buf.Write([]byte(",(")) } else { buf.WriteByte('(') } for j, value := range row { if j > 0 { buf.WriteByte(',') } value.EncodeSQL(&buf) } buf.WriteByte(')') } return buf.String() }
go
func makeValueString(fields []*querypb.Field, rows [][]sqltypes.Value) string { buf := bytes.Buffer{} for i, row := range rows { if i > 0 { buf.Write([]byte(",(")) } else { buf.WriteByte('(') } for j, value := range row { if j > 0 { buf.WriteByte(',') } value.EncodeSQL(&buf) } buf.WriteByte(')') } return buf.String() }
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// makeValueString returns a string that contains all the passed-in rows // as an insert SQL command's parameters.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/worker/clone_utils.go#L37-L54
train
vitessio/vitess
go/vt/vttablet/grpctmclient/client.go
dial
func (client *Client) dial(tablet *topodatapb.Tablet) (*grpc.ClientConn, tabletmanagerservicepb.TabletManagerClient, error) { addr := netutil.JoinHostPort(tablet.Hostname, int32(tablet.PortMap["grpc"])) opt, err := grpcclient.SecureDialOption(*cert, *key, *ca, *name) if err != nil { return nil, nil, err } cc, err := grpcclient.Dial(addr, grpcclient.FailFast(false), opt) if err != nil { return nil, nil, err } return cc, tabletmanagerservicepb.NewTabletManagerClient(cc), nil }
go
func (client *Client) dial(tablet *topodatapb.Tablet) (*grpc.ClientConn, tabletmanagerservicepb.TabletManagerClient, error) { addr := netutil.JoinHostPort(tablet.Hostname, int32(tablet.PortMap["grpc"])) opt, err := grpcclient.SecureDialOption(*cert, *key, *ca, *name) if err != nil { return nil, nil, err } cc, err := grpcclient.Dial(addr, grpcclient.FailFast(false), opt) if err != nil { return nil, nil, err } return cc, tabletmanagerservicepb.NewTabletManagerClient(cc), nil }
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// dial returns a client to use
[ "dial", "returns", "a", "client", "to", "use" ]
d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/grpctmclient/client.go#L80-L91
train
vitessio/vitess
go/vt/vttablet/grpctmclient/client.go
Ping
func (client *Client) Ping(ctx context.Context, tablet *topodatapb.Tablet) error { cc, c, err := client.dial(tablet) if err != nil { return err } defer cc.Close() result, err := c.Ping(ctx, &tabletmanagerdatapb.PingRequest{ Payload: "payload", }) if err != nil { return err } if result.Payload != "payload" { return fmt.Errorf("bad ping result: %v", result.Payload) } return nil }
go
func (client *Client) Ping(ctx context.Context, tablet *topodatapb.Tablet) error { cc, c, err := client.dial(tablet) if err != nil { return err } defer cc.Close() result, err := c.Ping(ctx, &tabletmanagerdatapb.PingRequest{ Payload: "payload", }) if err != nil { return err } if result.Payload != "payload" { return fmt.Errorf("bad ping result: %v", result.Payload) } return nil }
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// // Various read-only methods // // Ping is part of the tmclient.TabletManagerClient interface.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/grpctmclient/client.go#L134-L150
train
vitessio/vitess
go/vt/vttablet/grpctmclient/client.go
ExecuteFetchAsDba
func (client *Client) ExecuteFetchAsDba(ctx context.Context, tablet *topodatapb.Tablet, usePool bool, query []byte, maxRows int, disableBinlogs, reloadSchema bool) (*querypb.QueryResult, error) { var c tabletmanagerservicepb.TabletManagerClient var err error if usePool { c, err = client.dialPool(tablet) if err != nil { return nil, err } } else { var cc *grpc.ClientConn cc, c, err = client.dial(tablet) if err != nil { return nil, err } defer cc.Close() } response, err := c.ExecuteFetchAsDba(ctx, &tabletmanagerdatapb.ExecuteFetchAsDbaRequest{ Query: query, DbName: topoproto.TabletDbName(tablet), MaxRows: uint64(maxRows), DisableBinlogs: disableBinlogs, ReloadSchema: reloadSchema, }) if err != nil { return nil, err } return response.Result, nil }
go
func (client *Client) ExecuteFetchAsDba(ctx context.Context, tablet *topodatapb.Tablet, usePool bool, query []byte, maxRows int, disableBinlogs, reloadSchema bool) (*querypb.QueryResult, error) { var c tabletmanagerservicepb.TabletManagerClient var err error if usePool { c, err = client.dialPool(tablet) if err != nil { return nil, err } } else { var cc *grpc.ClientConn cc, c, err = client.dial(tablet) if err != nil { return nil, err } defer cc.Close() } response, err := c.ExecuteFetchAsDba(ctx, &tabletmanagerdatapb.ExecuteFetchAsDbaRequest{ Query: query, DbName: topoproto.TabletDbName(tablet), MaxRows: uint64(maxRows), DisableBinlogs: disableBinlogs, ReloadSchema: reloadSchema, }) if err != nil { return nil, err } return response.Result, nil }
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// ExecuteFetchAsDba is part of the tmclient.TabletManagerClient interface.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/grpctmclient/client.go#L372-L400
train
vitessio/vitess
go/vt/vttablet/grpctmclient/client.go
MasterPosition
func (client *Client) MasterPosition(ctx context.Context, tablet *topodatapb.Tablet) (string, error) { cc, c, err := client.dial(tablet) if err != nil { return "", err } defer cc.Close() response, err := c.MasterPosition(ctx, &tabletmanagerdatapb.MasterPositionRequest{}) if err != nil { return "", err } return response.Position, nil }
go
func (client *Client) MasterPosition(ctx context.Context, tablet *topodatapb.Tablet) (string, error) { cc, c, err := client.dial(tablet) if err != nil { return "", err } defer cc.Close() response, err := c.MasterPosition(ctx, &tabletmanagerdatapb.MasterPositionRequest{}) if err != nil { return "", err } return response.Position, nil }
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// MasterPosition is part of the tmclient.TabletManagerClient interface.
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d568817542a413611801aa17a1c213aa95592182
https://github.com/vitessio/vitess/blob/d568817542a413611801aa17a1c213aa95592182/go/vt/vttablet/grpctmclient/client.go#L472-L483
train