// SplitQuery is the stub for TabletServer.SplitQuery RPC
// TODO(erez): Remove this method and rename SplitQueryV2 to SplitQuery once
// the migration to SplitQuery V2 is done.
func (conn *gRPCQueryClient) SplitQuery(ctx context.Context, target *querypb.Target, query querytypes.BoundQuery, splitColumn string, splitCount int64) (queries []querytypes.QuerySplit, err error) {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
err = tabletconn.ConnClosed
return
}
q, err := querytypes.BoundQueryToProto3(query.Sql, query.BindVariables)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
req := &querypb.SplitQueryRequest{
Target: target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
Query: q,
SplitColumn: []string{splitColumn},
SplitCount: splitCount,
NumRowsPerQueryPart: 0,
Algorithm: querypb.SplitQueryRequest_EQUAL_SPLITS,
UseSplitQueryV2: false,
}
sqr, err := conn.c.SplitQuery(ctx, req)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
split, err := querytypes.Proto3ToQuerySplits(sqr.Queries)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
return split, nil
}
// SplitQuery is the stub for TabletServer.SplitQuery RPC
func (conn *gRPCQueryClient) SplitQuery(ctx context.Context, query tproto.BoundQuery, splitColumn string, splitCount int) (queries []tproto.QuerySplit, err error) {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
err = tabletconn.ConnClosed
return
}
q, err := tproto.BoundQueryToProto3(query.Sql, query.BindVariables)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
req := &pb.SplitQueryRequest{
Target: conn.target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
Query: q,
SplitColumn: splitColumn,
SplitCount: int64(splitCount),
SessionId: conn.sessionID,
}
sqr, err := conn.c.SplitQuery(ctx, req)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
split, err := tproto.Proto3ToQuerySplits(sqr.Queries)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
return split, nil
}
// BeginExecute starts a transaction and runs an Execute.
func (conn *gRPCQueryClient) BeginExecute(ctx context.Context, target *querypb.Target, query string, bindVars map[string]interface{}, options *querypb.ExecuteOptions) (result *sqltypes.Result, transactionID int64, err error) {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
return nil, 0, tabletconn.ConnClosed
}
q, err := querytypes.BoundQueryToProto3(query, bindVars)
if err != nil {
return nil, 0, err
}
if *combo {
// If combo is enabled, we combine both calls
req := &querypb.BeginExecuteRequest{
Target: target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
Query: q,
Options: options,
}
reply, err := conn.c.BeginExecute(ctx, req)
if err != nil {
return nil, 0, tabletconn.TabletErrorFromGRPC(err)
}
if reply.Error != nil {
return nil, reply.TransactionId, tabletconn.TabletErrorFromRPCError(reply.Error)
}
return sqltypes.Proto3ToResult(reply.Result), reply.TransactionId, nil
}
// Begin part.
breq := &querypb.BeginRequest{
Target: target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
}
br, err := conn.c.Begin(ctx, breq)
if err != nil {
return nil, 0, tabletconn.TabletErrorFromGRPC(err)
}
transactionID = br.TransactionId
// Execute part.
ereq := &querypb.ExecuteRequest{
Target: target,
EffectiveCallerId: breq.EffectiveCallerId,
ImmediateCallerId: breq.ImmediateCallerId,
Query: q,
TransactionId: transactionID,
Options: options,
}
er, err := conn.c.Execute(ctx, ereq)
if err != nil {
return nil, transactionID, tabletconn.TabletErrorFromGRPC(err)
}
return sqltypes.Proto3ToResult(er.Result), transactionID, nil
}
// SplitQuery is part of tabletconn.TabletConn
func (itc *internalTabletConn) SplitQuery(ctx context.Context, target *querypb.Target, query querytypes.BoundQuery, splitColumn string, splitCount int64) ([]querytypes.QuerySplit, error) {
splits, err := itc.tablet.qsc.QueryService().SplitQuery(ctx, target, query.Sql, query.BindVariables, splitColumn, splitCount)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(vterrors.ToGRPCError(err))
}
return splits, nil
}
// ExecuteBatch sends a batch query to VTTablet.
func (conn *gRPCQueryClient) ExecuteBatch(ctx context.Context, target *querypb.Target, queries []querytypes.BoundQuery, asTransaction bool, transactionID int64, options *querypb.ExecuteOptions) ([]sqltypes.Result, error) {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
return nil, tabletconn.ConnClosed
}
req := &querypb.ExecuteBatchRequest{
Target: target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
Queries: make([]*querypb.BoundQuery, len(queries)),
AsTransaction: asTransaction,
TransactionId: transactionID,
Options: options,
}
for i, q := range queries {
qq, err := querytypes.BoundQueryToProto3(q.Sql, q.BindVariables)
if err != nil {
return nil, err
}
req.Queries[i] = qq
}
ebr, err := conn.c.ExecuteBatch(ctx, req)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
return sqltypes.Proto3ToResults(ebr.Results), nil
}
// SplitQueryV2 is part of tabletconn.TabletConn
// TODO(erez): Rename to SplitQuery once the migration to SplitQuery V2 is done.
func (itc *internalTabletConn) SplitQueryV2(
ctx context.Context,
query querytypes.BoundQuery,
splitColumns []string,
splitCount int64,
numRowsPerQueryPart int64,
algorithm querypb.SplitQueryRequest_Algorithm) ([]querytypes.QuerySplit, error) {
splits, err := itc.tablet.qsc.QueryService().SplitQueryV2(
ctx,
&querypb.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
},
query.Sql,
query.BindVariables,
splitColumns,
splitCount,
numRowsPerQueryPart,
algorithm)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(err))
}
return splits, nil
}
// StreamExecute is part of tabletconn.TabletConn
// We need to copy the bind variables as tablet server will change them.
func (itc *internalTabletConn) StreamExecute(ctx context.Context, target *querypb.Target, query string, bindVars map[string]interface{}, options *querypb.ExecuteOptions) (sqltypes.ResultStream, error) {
bv, err := querytypes.BindVariablesToProto3(bindVars)
if err != nil {
return nil, err
}
bindVars, err = querytypes.Proto3ToBindVariables(bv)
if err != nil {
return nil, err
}
result := make(chan *sqltypes.Result, 10)
var finalErr error
go func() {
finalErr = itc.tablet.qsc.QueryService().StreamExecute(ctx, target, query, bindVars, options, func(reply *sqltypes.Result) error {
// We need to deep-copy the reply before returning,
// because the underlying buffers are reused.
result <- reply.Copy()
return nil
})
finalErr = tabletconn.TabletErrorFromGRPC(vterrors.ToGRPCError(finalErr))
// the client will only access finalErr after the
// channel is closed, and then it's already set.
close(result)
}()
return &streamExecuteAdapter{result, &finalErr}, nil
}
// StreamHealth is part of tabletconn.TabletConn
func (itc *internalTabletConn) StreamHealth(ctx context.Context) (tabletconn.StreamHealthReader, error) {
result := make(chan *querypb.StreamHealthResponse, 10)
id, err := itc.tablet.qsc.QueryService().StreamHealthRegister(result)
if err != nil {
return nil, err
}
var finalErr error
go func() {
select {
case <-ctx.Done():
}
// We populate finalErr before closing the channel.
// The consumer first waits on the channel closure,
// then read finalErr
finalErr = itc.tablet.qsc.QueryService().StreamHealthUnregister(id)
finalErr = tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(finalErr))
close(result)
}()
return &streamHealthReader{
c: result,
err: &finalErr,
}, nil
}
// Execute sends the query to VTTablet.
func (conn *gRPCQueryClient) Execute(ctx context.Context, query string, bindVars map[string]interface{}, transactionID int64) (*sqltypes.Result, error) {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
return nil, tabletconn.ConnClosed
}
q, err := tproto.BoundQueryToProto3(query, bindVars)
if err != nil {
return nil, err
}
req := &pb.ExecuteRequest{
Target: conn.target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
Query: q,
TransactionId: transactionID,
SessionId: conn.sessionID,
}
er, err := conn.c.Execute(ctx, req)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
return sqltypes.Proto3ToResult(er.Result), nil
}
// ExecuteBatch is part of tabletconn.TabletConn
// We need to copy the bind variables as tablet server will change them.
func (itc *internalTabletConn) ExecuteBatch(ctx context.Context, queries []tproto.BoundQuery, asTransaction bool, transactionID int64) (*tproto.QueryResultList, error) {
q := make([]tproto.BoundQuery, len(queries))
for i, query := range queries {
bv, err := tproto.BindVariablesToProto3(query.BindVariables)
if err != nil {
return nil, err
}
bindVars, err := tproto.Proto3ToBindVariables(bv)
if err != nil {
return nil, err
}
q[i].Sql = query.Sql
q[i].BindVariables = bindVars
}
reply := &tproto.QueryResultList{}
if err := itc.tablet.qsc.QueryService().ExecuteBatch(ctx, &querypb.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, &tproto.QueryList{
Queries: q,
AsTransaction: asTransaction,
TransactionId: transactionID,
}, reply); err != nil {
return nil, tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(err))
}
return reply, nil
}
// StreamExecute is part of tabletconn.TabletConn
// We need to copy the bind variables as tablet server will change them.
func (itc *internalTabletConn) StreamExecute(ctx context.Context, query string, bindVars map[string]interface{}, transactionID int64) (<-chan *mproto.QueryResult, tabletconn.ErrFunc, error) {
bindVars = tproto.Proto3ToBindVariables(tproto.BindVariablesToProto3(bindVars))
result := make(chan *mproto.QueryResult, 10)
var finalErr error
go func() {
finalErr = itc.tablet.qsc.QueryService().StreamExecute(ctx, &pbq.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, &tproto.Query{
Sql: query,
BindVariables: bindVars,
TransactionId: transactionID,
}, func(reply *mproto.QueryResult) error {
result <- reply
return nil
})
// the client will only access finalErr after the
// channel is closed, and then it's already set.
close(result)
}()
return result, func() error {
return tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(finalErr))
}, nil
}
// StreamExecute is part of tabletconn.TabletConn
// We need to copy the bind variables as tablet server will change them.
func (itc *internalTabletConn) StreamExecute(ctx context.Context, query string, bindVars map[string]interface{}, transactionID int64) (<-chan *sqltypes.Result, tabletconn.ErrFunc, error) {
bv, err := querytypes.BindVariablesToProto3(bindVars)
if err != nil {
return nil, nil, err
}
bindVars, err = querytypes.Proto3ToBindVariables(bv)
if err != nil {
return nil, nil, err
}
result := make(chan *sqltypes.Result, 10)
var finalErr error
go func() {
finalErr = itc.tablet.qsc.QueryService().StreamExecute(ctx, &querypb.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, query, bindVars, 0, func(reply *sqltypes.Result) error {
// We need to deep-copy the reply before returning,
// because the underlying buffers are reused.
result <- reply.Copy()
return nil
})
// the client will only access finalErr after the
// channel is closed, and then it's already set.
close(result)
}()
return result, func() error {
return tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(finalErr))
}, nil
}
// Begin is part of tabletconn.TabletConn
func (itc *internalTabletConn) Begin(ctx context.Context, target *querypb.Target) (int64, error) {
transactionID, err := itc.tablet.qsc.QueryService().Begin(ctx, target)
if err != nil {
return 0, tabletconn.TabletErrorFromGRPC(vterrors.ToGRPCError(err))
}
return transactionID, nil
}
// ExecuteBatch sends a batch query to VTTablet.
func (conn *gRPCQueryClient) ExecuteBatch(ctx context.Context, queries []tproto.BoundQuery, asTransaction bool, transactionID int64) (*tproto.QueryResultList, error) {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
return nil, tabletconn.ConnClosed
}
req := &pb.ExecuteBatchRequest{
Target: conn.target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
Queries: make([]*pb.BoundQuery, len(queries)),
AsTransaction: asTransaction,
TransactionId: transactionID,
SessionId: conn.sessionID,
}
for i, q := range queries {
req.Queries[i] = tproto.BoundQueryToProto3(q.Sql, q.BindVariables)
}
ebr, err := conn.c.ExecuteBatch(ctx, req)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
return tproto.Proto3ToQueryResultList(ebr.Results), nil
}
// Rollback is part of tabletconn.TabletConn
func (itc *internalTabletConn) Rollback(ctx context.Context, transactionID int64) error {
err := itc.tablet.qsc.QueryService().Rollback(ctx, &querypb.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, 0, transactionID)
return tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(err))
}
// StreamExecute starts a streaming query to VTTablet.
func (conn *gRPCQueryClient) StreamExecute(ctx context.Context, query string, bindVars map[string]interface{}, transactionID int64) (<-chan *sqltypes.Result, tabletconn.ErrFunc, error) {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
return nil, nil, tabletconn.ConnClosed
}
q, err := querytypes.BoundQueryToProto3(query, bindVars)
if err != nil {
return nil, nil, err
}
req := &querypb.StreamExecuteRequest{
Target: conn.target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
Query: q,
SessionId: conn.sessionID,
}
stream, err := conn.c.StreamExecute(ctx, req)
if err != nil {
return nil, nil, tabletconn.TabletErrorFromGRPC(err)
}
sr := make(chan *sqltypes.Result, 10)
var finalError error
go func() {
var fields []*querypb.Field
for {
ser, err := stream.Recv()
if err != nil {
if err != io.EOF {
finalError = tabletconn.TabletErrorFromGRPC(err)
}
close(sr)
return
}
if fields == nil {
fields = ser.Result.Fields
}
sr <- sqltypes.CustomProto3ToResult(fields, ser.Result)
}
}()
return sr, func() error {
return finalError
}, nil
}
// Commit is part of tabletconn.TabletConn
func (itc *internalTabletConn) Commit(ctx context.Context, transactionID int64) error {
err := itc.tablet.qsc.QueryService().Commit(ctx, &pbq.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, &tproto.Session{
TransactionId: transactionID,
})
return tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(err))
}
// Begin is part of tabletconn.TabletConn
func (itc *internalTabletConn) Begin(ctx context.Context) (int64, error) {
transactionID, err := itc.tablet.qsc.QueryService().Begin(ctx, &querypb.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, 0)
if err != nil {
return 0, tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(err))
}
return transactionID, nil
}
// Begin is part of tabletconn.TabletConn
func (itc *internalTabletConn) Begin(ctx context.Context) (transactionID int64, err error) {
result := &tproto.TransactionInfo{}
if err := itc.tablet.qsc.QueryService().Begin(ctx, &pbq.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, &tproto.Session{}, result); err != nil {
return 0, tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(err))
}
return result.TransactionId, nil
}
func (a *updateStreamAdapter) Recv() (*querypb.StreamEvent, error) {
r, err := a.stream.Recv()
switch err {
case nil:
return r.Event, nil
case io.EOF:
return nil, err
default:
return nil, tabletconn.TabletErrorFromGRPC(err)
}
}
func (a *streamExecuteAdapter) Recv() (*sqltypes.Result, error) {
ser, err := a.stream.Recv()
switch err {
case nil:
if a.fields == nil {
a.fields = ser.Result.Fields
}
return sqltypes.CustomProto3ToResult(a.fields, ser.Result), nil
case io.EOF:
return nil, err
default:
return nil, tabletconn.TabletErrorFromGRPC(err)
}
}
// SplitQuery is part of tabletconn.TabletConn
func (itc *internalTabletConn) SplitQuery(ctx context.Context, query tproto.BoundQuery, splitColumn string, splitCount int) ([]tproto.QuerySplit, error) {
reply := &tproto.SplitQueryResult{}
if err := itc.tablet.qsc.QueryService().SplitQuery(ctx, &pbq.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, &tproto.SplitQueryRequest{
Query: query,
SplitColumn: splitColumn,
SplitCount: splitCount,
}, reply); err != nil {
return nil, tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(err))
}
return reply.Queries, nil
}
// Execute is part of tabletconn.TabletConn
// We need to copy the bind variables as tablet server will change them.
func (itc *internalTabletConn) Execute(ctx context.Context, target *querypb.Target, query string, bindVars map[string]interface{}, transactionID int64, options *querypb.ExecuteOptions) (*sqltypes.Result, error) {
bv, err := querytypes.BindVariablesToProto3(bindVars)
if err != nil {
return nil, err
}
bindVars, err = querytypes.Proto3ToBindVariables(bv)
if err != nil {
return nil, err
}
reply, err := itc.tablet.qsc.QueryService().Execute(ctx, target, query, bindVars, transactionID, options)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(vterrors.ToGRPCError(err))
}
return reply, nil
}
// Execute is part of tabletconn.TabletConn
// We need to copy the bind variables as tablet server will change them.
func (itc *internalTabletConn) Execute(ctx context.Context, query string, bindVars map[string]interface{}, transactionID int64) (*mproto.QueryResult, error) {
bindVars = tproto.Proto3ToBindVariables(tproto.BindVariablesToProto3(bindVars))
reply := &mproto.QueryResult{}
if err := itc.tablet.qsc.QueryService().Execute(ctx, &pbq.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, &tproto.Query{
Sql: query,
BindVariables: bindVars,
TransactionId: transactionID,
}, reply); err != nil {
return nil, tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(err))
}
return reply, nil
}
// Begin starts a transaction.
func (conn *gRPCQueryClient) Begin(ctx context.Context, target *querypb.Target) (transactionID int64, err error) {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
return 0, tabletconn.ConnClosed
}
req := &querypb.BeginRequest{
Target: target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
}
br, err := conn.c.Begin(ctx, req)
if err != nil {
return 0, tabletconn.TabletErrorFromGRPC(err)
}
return br.TransactionId, nil
}
// ReadTransaction returns the metadata for the sepcified dtid.
func (conn *gRPCQueryClient) ReadTransaction(ctx context.Context, target *querypb.Target, dtid string) (*querypb.TransactionMetadata, error) {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
return nil, tabletconn.ConnClosed
}
req := &querypb.ReadTransactionRequest{
Target: target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
Dtid: dtid,
}
response, err := conn.c.ReadTransaction(ctx, req)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(err)
}
return response.Metadata, nil
}
// Rollback rolls back the ongoing transaction.
func (conn *gRPCQueryClient) Rollback(ctx context.Context, target *querypb.Target, transactionID int64) error {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
return tabletconn.ConnClosed
}
req := &querypb.RollbackRequest{
Target: target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
TransactionId: transactionID,
}
_, err := conn.c.Rollback(ctx, req)
if err != nil {
return tabletconn.TabletErrorFromGRPC(err)
}
return nil
}
// Execute is part of tabletconn.TabletConn
// We need to copy the bind variables as tablet server will change them.
func (itc *internalTabletConn) Execute(ctx context.Context, query string, bindVars map[string]interface{}, transactionID int64) (*sqltypes.Result, error) {
bv, err := querytypes.BindVariablesToProto3(bindVars)
if err != nil {
return nil, err
}
bindVars, err = querytypes.Proto3ToBindVariables(bv)
if err != nil {
return nil, err
}
reply, err := itc.tablet.qsc.QueryService().Execute(ctx, &querypb.Target{
Keyspace: itc.tablet.keyspace,
Shard: itc.tablet.shard,
TabletType: itc.tablet.tabletType,
}, query, bindVars, 0, transactionID)
if err != nil {
return nil, tabletconn.TabletErrorFromGRPC(tabletserver.ToGRPCError(err))
}
return reply, nil
}
// CommitPrepared commits the prepared transaction.
func (conn *gRPCQueryClient) CommitPrepared(ctx context.Context, target *querypb.Target, dtid string) error {
conn.mu.RLock()
defer conn.mu.RUnlock()
if conn.cc == nil {
return tabletconn.ConnClosed
}
req := &querypb.CommitPreparedRequest{
Target: target,
EffectiveCallerId: callerid.EffectiveCallerIDFromContext(ctx),
ImmediateCallerId: callerid.ImmediateCallerIDFromContext(ctx),
Dtid: dtid,
}
_, err := conn.c.CommitPrepared(ctx, req)
if err != nil {
return tabletconn.TabletErrorFromGRPC(err)
}
return nil
}
// UpdateStream is part of tabletconn.TabletConn.
func (itc *internalTabletConn) UpdateStream(ctx context.Context, target *querypb.Target, position string, timestamp int64) (tabletconn.StreamEventReader, error) {
result := make(chan *querypb.StreamEvent, 10)
var finalErr error
go func() {
finalErr = itc.tablet.qsc.QueryService().UpdateStream(ctx, target, position, timestamp, func(reply *querypb.StreamEvent) error {
// We need to deep-copy the reply before returning,
// because the underlying buffers are reused.
result <- proto.Clone(reply).(*querypb.StreamEvent)
return nil
})
finalErr = tabletconn.TabletErrorFromGRPC(vterrors.ToGRPCError(finalErr))
// the client will only access finalErr after the
// channel is closed, and then it's already set.
close(result)
}()
return &updateStreamAdapter{result, &finalErr}, nil
}
