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[bytom/vapor.git] / vendor / google.golang.org / genproto / googleapis / spanner / v1 / transaction.pb.go

// Code generated by protoc-gen-go. DO NOT EDIT.
// source: google/spanner/v1/transaction.proto

package spanner

import proto "github.com/golang/protobuf/proto"
import fmt "fmt"
import math "math"
import _ "google.golang.org/genproto/googleapis/api/annotations"
import google_protobuf2 "github.com/golang/protobuf/ptypes/duration"
import google_protobuf3 "github.com/golang/protobuf/ptypes/timestamp"

// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf

// # Transactions
//
//
// Each session can have at most one active transaction at a time. After the
// active transaction is completed, the session can immediately be
// re-used for the next transaction. It is not necessary to create a
// new session for each transaction.
//
// # Transaction Modes
//
// Cloud Spanner supports two transaction modes:
//
//   1. Locking read-write. This type of transaction is the only way
//      to write data into Cloud Spanner. These transactions rely on
//      pessimistic locking and, if necessary, two-phase commit.
//      Locking read-write transactions may abort, requiring the
//      application to retry.
//
//   2. Snapshot read-only. This transaction type provides guaranteed
//      consistency across several reads, but does not allow
//      writes. Snapshot read-only transactions can be configured to
//      read at timestamps in the past. Snapshot read-only
//      transactions do not need to be committed.
//
// For transactions that only read, snapshot read-only transactions
// provide simpler semantics and are almost always faster. In
// particular, read-only transactions do not take locks, so they do
// not conflict with read-write transactions. As a consequence of not
// taking locks, they also do not abort, so retry loops are not needed.
//
// Transactions may only read/write data in a single database. They
// may, however, read/write data in different tables within that
// database.
//
// ## Locking Read-Write Transactions
//
// Locking transactions may be used to atomically read-modify-write
// data anywhere in a database. This type of transaction is externally
// consistent.
//
// Clients should attempt to minimize the amount of time a transaction
// is active. Faster transactions commit with higher probability
// and cause less contention. Cloud Spanner attempts to keep read locks
// active as long as the transaction continues to do reads, and the
// transaction has not been terminated by
// [Commit][google.spanner.v1.Spanner.Commit] or
// [Rollback][google.spanner.v1.Spanner.Rollback].  Long periods of
// inactivity at the client may cause Cloud Spanner to release a
// transaction's locks and abort it.
//
// Reads performed within a transaction acquire locks on the data
// being read. Writes can only be done at commit time, after all reads
// have been completed.
// Conceptually, a read-write transaction consists of zero or more
// reads or SQL queries followed by
// [Commit][google.spanner.v1.Spanner.Commit]. At any time before
// [Commit][google.spanner.v1.Spanner.Commit], the client can send a
// [Rollback][google.spanner.v1.Spanner.Rollback] request to abort the
// transaction.
//
// ### Semantics
//
// Cloud Spanner can commit the transaction if all read locks it acquired
// are still valid at commit time, and it is able to acquire write
// locks for all writes. Cloud Spanner can abort the transaction for any
// reason. If a commit attempt returns `ABORTED`, Cloud Spanner guarantees
// that the transaction has not modified any user data in Cloud Spanner.
//
// Unless the transaction commits, Cloud Spanner makes no guarantees about
// how long the transaction's locks were held for. It is an error to
// use Cloud Spanner locks for any sort of mutual exclusion other than
// between Cloud Spanner transactions themselves.
//
// ### Retrying Aborted Transactions
//
// When a transaction aborts, the application can choose to retry the
// whole transaction again. To maximize the chances of successfully
// committing the retry, the client should execute the retry in the
// same session as the original attempt. The original session's lock
// priority increases with each consecutive abort, meaning that each
// attempt has a slightly better chance of success than the previous.
//
// Under some circumstances (e.g., many transactions attempting to
// modify the same row(s)), a transaction can abort many times in a
// short period before successfully committing. Thus, it is not a good
// idea to cap the number of retries a transaction can attempt;
// instead, it is better to limit the total amount of wall time spent
// retrying.
//
// ### Idle Transactions
//
// A transaction is considered idle if it has no outstanding reads or
// SQL queries and has not started a read or SQL query within the last 10
// seconds. Idle transactions can be aborted by Cloud Spanner so that they
// don't hold on to locks indefinitely. In that case, the commit will
// fail with error `ABORTED`.
//
// If this behavior is undesirable, periodically executing a simple
// SQL query in the transaction (e.g., `SELECT 1`) prevents the
// transaction from becoming idle.
//
// ## Snapshot Read-Only Transactions
//
// Snapshot read-only transactions provides a simpler method than
// locking read-write transactions for doing several consistent
// reads. However, this type of transaction does not support writes.
//
// Snapshot transactions do not take locks. Instead, they work by
// choosing a Cloud Spanner timestamp, then executing all reads at that
// timestamp. Since they do not acquire locks, they do not block
// concurrent read-write transactions.
//
// Unlike locking read-write transactions, snapshot read-only
// transactions never abort. They can fail if the chosen read
// timestamp is garbage collected; however, the default garbage
// collection policy is generous enough that most applications do not
// need to worry about this in practice.
//
// Snapshot read-only transactions do not need to call
// [Commit][google.spanner.v1.Spanner.Commit] or
// [Rollback][google.spanner.v1.Spanner.Rollback] (and in fact are not
// permitted to do so).
//
// To execute a snapshot transaction, the client specifies a timestamp
// bound, which tells Cloud Spanner how to choose a read timestamp.
//
// The types of timestamp bound are:
//
//   - Strong (the default).
//   - Bounded staleness.
//   - Exact staleness.
//
// If the Cloud Spanner database to be read is geographically distributed,
// stale read-only transactions can execute more quickly than strong
// or read-write transaction, because they are able to execute far
// from the leader replica.
//
// Each type of timestamp bound is discussed in detail below.
//
// ### Strong
//
// Strong reads are guaranteed to see the effects of all transactions
// that have committed before the start of the read. Furthermore, all
// rows yielded by a single read are consistent with each other -- if
// any part of the read observes a transaction, all parts of the read
// see the transaction.
//
// Strong reads are not repeatable: two consecutive strong read-only
// transactions might return inconsistent results if there are
// concurrent writes. If consistency across reads is required, the
// reads should be executed within a transaction or at an exact read
// timestamp.
//
// See [TransactionOptions.ReadOnly.strong][google.spanner.v1.TransactionOptions.ReadOnly.strong].
//
// ### Exact Staleness
//
// These timestamp bounds execute reads at a user-specified
// timestamp. Reads at a timestamp are guaranteed to see a consistent
// prefix of the global transaction history: they observe
// modifications done by all transactions with a commit timestamp <=
// the read timestamp, and observe none of the modifications done by
// transactions with a larger commit timestamp. They will block until
// all conflicting transactions that may be assigned commit timestamps
// <= the read timestamp have finished.
//
// The timestamp can either be expressed as an absolute Cloud Spanner commit
// timestamp or a staleness relative to the current time.
//
// These modes do not require a "negotiation phase" to pick a
// timestamp. As a result, they execute slightly faster than the
// equivalent boundedly stale concurrency modes. On the other hand,
// boundedly stale reads usually return fresher results.
//
// See [TransactionOptions.ReadOnly.read_timestamp][google.spanner.v1.TransactionOptions.ReadOnly.read_timestamp] and
// [TransactionOptions.ReadOnly.exact_staleness][google.spanner.v1.TransactionOptions.ReadOnly.exact_staleness].
//
// ### Bounded Staleness
//
// Bounded staleness modes allow Cloud Spanner to pick the read timestamp,
// subject to a user-provided staleness bound. Cloud Spanner chooses the
// newest timestamp within the staleness bound that allows execution
// of the reads at the closest available replica without blocking.
//
// All rows yielded are consistent with each other -- if any part of
// the read observes a transaction, all parts of the read see the
// transaction. Boundedly stale reads are not repeatable: two stale
// reads, even if they use the same staleness bound, can execute at
// different timestamps and thus return inconsistent results.
//
// Boundedly stale reads execute in two phases: the first phase
// negotiates a timestamp among all replicas needed to serve the
// read. In the second phase, reads are executed at the negotiated
// timestamp.
//
// As a result of the two phase execution, bounded staleness reads are
// usually a little slower than comparable exact staleness
// reads. However, they are typically able to return fresher
// results, and are more likely to execute at the closest replica.
//
// Because the timestamp negotiation requires up-front knowledge of
// which rows will be read, it can only be used with single-use
// read-only transactions.
//
// See [TransactionOptions.ReadOnly.max_staleness][google.spanner.v1.TransactionOptions.ReadOnly.max_staleness] and
// [TransactionOptions.ReadOnly.min_read_timestamp][google.spanner.v1.TransactionOptions.ReadOnly.min_read_timestamp].
//
// ### Old Read Timestamps and Garbage Collection
//
// Cloud Spanner continuously garbage collects deleted and overwritten data
// in the background to reclaim storage space. This process is known
// as "version GC". By default, version GC reclaims versions after they
// are one hour old. Because of this, Cloud Spanner cannot perform reads
// at read timestamps more than one hour in the past. This
// restriction also applies to in-progress reads and/or SQL queries whose
// timestamp become too old while executing. Reads and SQL queries with
// too-old read timestamps fail with the error `FAILED_PRECONDITION`.
type TransactionOptions struct {
        // Required. The type of transaction.
        //
        // Types that are valid to be assigned to Mode:
        //      *TransactionOptions_ReadWrite_
        //      *TransactionOptions_ReadOnly_
        Mode isTransactionOptions_Mode `protobuf_oneof:"mode"`
}

func (m *TransactionOptions) Reset()                    { *m = TransactionOptions{} }
func (m *TransactionOptions) String() string            { return proto.CompactTextString(m) }
func (*TransactionOptions) ProtoMessage()               {}
func (*TransactionOptions) Descriptor() ([]byte, []int) { return fileDescriptor5, []int{0} }

type isTransactionOptions_Mode interface {
        isTransactionOptions_Mode()
}

type TransactionOptions_ReadWrite_ struct {
        ReadWrite *TransactionOptions_ReadWrite `protobuf:"bytes,1,opt,name=read_write,json=readWrite,oneof"`
}
type TransactionOptions_ReadOnly_ struct {
        ReadOnly *TransactionOptions_ReadOnly `protobuf:"bytes,2,opt,name=read_only,json=readOnly,oneof"`
}

func (*TransactionOptions_ReadWrite_) isTransactionOptions_Mode() {}
func (*TransactionOptions_ReadOnly_) isTransactionOptions_Mode()  {}

func (m *TransactionOptions) GetMode() isTransactionOptions_Mode {
        if m != nil {
                return m.Mode
        }
        return nil
}

func (m *TransactionOptions) GetReadWrite() *TransactionOptions_ReadWrite {
        if x, ok := m.GetMode().(*TransactionOptions_ReadWrite_); ok {
                return x.ReadWrite
        }
        return nil
}

func (m *TransactionOptions) GetReadOnly() *TransactionOptions_ReadOnly {
        if x, ok := m.GetMode().(*TransactionOptions_ReadOnly_); ok {
                return x.ReadOnly
        }
        return nil
}

// XXX_OneofFuncs is for the internal use of the proto package.
func (*TransactionOptions) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
        return _TransactionOptions_OneofMarshaler, _TransactionOptions_OneofUnmarshaler, _TransactionOptions_OneofSizer, []interface{}{
                (*TransactionOptions_ReadWrite_)(nil),
                (*TransactionOptions_ReadOnly_)(nil),
        }
}

func _TransactionOptions_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
        m := msg.(*TransactionOptions)
        // mode
        switch x := m.Mode.(type) {
        case *TransactionOptions_ReadWrite_:
                b.EncodeVarint(1<<3 | proto.WireBytes)
                if err := b.EncodeMessage(x.ReadWrite); err != nil {
                        return err
                }
        case *TransactionOptions_ReadOnly_:
                b.EncodeVarint(2<<3 | proto.WireBytes)
                if err := b.EncodeMessage(x.ReadOnly); err != nil {
                        return err
                }
        case nil:
        default:
                return fmt.Errorf("TransactionOptions.Mode has unexpected type %T", x)
        }
        return nil
}

func _TransactionOptions_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
        m := msg.(*TransactionOptions)
        switch tag {
        case 1: // mode.read_write
                if wire != proto.WireBytes {
                        return true, proto.ErrInternalBadWireType
                }
                msg := new(TransactionOptions_ReadWrite)
                err := b.DecodeMessage(msg)
                m.Mode = &TransactionOptions_ReadWrite_{msg}
                return true, err
        case 2: // mode.read_only
                if wire != proto.WireBytes {
                        return true, proto.ErrInternalBadWireType
                }
                msg := new(TransactionOptions_ReadOnly)
                err := b.DecodeMessage(msg)
                m.Mode = &TransactionOptions_ReadOnly_{msg}
                return true, err
        default:
                return false, nil
        }
}

func _TransactionOptions_OneofSizer(msg proto.Message) (n int) {
        m := msg.(*TransactionOptions)
        // mode
        switch x := m.Mode.(type) {
        case *TransactionOptions_ReadWrite_:
                s := proto.Size(x.ReadWrite)
                n += proto.SizeVarint(1<<3 | proto.WireBytes)
                n += proto.SizeVarint(uint64(s))
                n += s
        case *TransactionOptions_ReadOnly_:
                s := proto.Size(x.ReadOnly)
                n += proto.SizeVarint(2<<3 | proto.WireBytes)
                n += proto.SizeVarint(uint64(s))
                n += s
        case nil:
        default:
                panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
        }
        return n
}

// Options for read-write transactions.
type TransactionOptions_ReadWrite struct {
}

func (m *TransactionOptions_ReadWrite) Reset()                    { *m = TransactionOptions_ReadWrite{} }
func (m *TransactionOptions_ReadWrite) String() string            { return proto.CompactTextString(m) }
func (*TransactionOptions_ReadWrite) ProtoMessage()               {}
func (*TransactionOptions_ReadWrite) Descriptor() ([]byte, []int) { return fileDescriptor5, []int{0, 0} }

// Options for read-only transactions.
type TransactionOptions_ReadOnly struct {
        // How to choose the timestamp for the read-only transaction.
        //
        // Types that are valid to be assigned to TimestampBound:
        //      *TransactionOptions_ReadOnly_Strong
        //      *TransactionOptions_ReadOnly_MinReadTimestamp
        //      *TransactionOptions_ReadOnly_MaxStaleness
        //      *TransactionOptions_ReadOnly_ReadTimestamp
        //      *TransactionOptions_ReadOnly_ExactStaleness
        TimestampBound isTransactionOptions_ReadOnly_TimestampBound `protobuf_oneof:"timestamp_bound"`
        // If true, the Cloud Spanner-selected read timestamp is included in
        // the [Transaction][google.spanner.v1.Transaction] message that describes the transaction.
        ReturnReadTimestamp bool `protobuf:"varint,6,opt,name=return_read_timestamp,json=returnReadTimestamp" json:"return_read_timestamp,omitempty"`
}

func (m *TransactionOptions_ReadOnly) Reset()                    { *m = TransactionOptions_ReadOnly{} }
func (m *TransactionOptions_ReadOnly) String() string            { return proto.CompactTextString(m) }
func (*TransactionOptions_ReadOnly) ProtoMessage()               {}
func (*TransactionOptions_ReadOnly) Descriptor() ([]byte, []int) { return fileDescriptor5, []int{0, 1} }

type isTransactionOptions_ReadOnly_TimestampBound interface {
        isTransactionOptions_ReadOnly_TimestampBound()
}

type TransactionOptions_ReadOnly_Strong struct {
        Strong bool `protobuf:"varint,1,opt,name=strong,oneof"`
}
type TransactionOptions_ReadOnly_MinReadTimestamp struct {
        MinReadTimestamp *google_protobuf3.Timestamp `protobuf:"bytes,2,opt,name=min_read_timestamp,json=minReadTimestamp,oneof"`
}
type TransactionOptions_ReadOnly_MaxStaleness struct {
        MaxStaleness *google_protobuf2.Duration `protobuf:"bytes,3,opt,name=max_staleness,json=maxStaleness,oneof"`
}
type TransactionOptions_ReadOnly_ReadTimestamp struct {
        ReadTimestamp *google_protobuf3.Timestamp `protobuf:"bytes,4,opt,name=read_timestamp,json=readTimestamp,oneof"`
}
type TransactionOptions_ReadOnly_ExactStaleness struct {
        ExactStaleness *google_protobuf2.Duration `protobuf:"bytes,5,opt,name=exact_staleness,json=exactStaleness,oneof"`
}

func (*TransactionOptions_ReadOnly_Strong) isTransactionOptions_ReadOnly_TimestampBound()           {}
func (*TransactionOptions_ReadOnly_MinReadTimestamp) isTransactionOptions_ReadOnly_TimestampBound() {}
func (*TransactionOptions_ReadOnly_MaxStaleness) isTransactionOptions_ReadOnly_TimestampBound()     {}
func (*TransactionOptions_ReadOnly_ReadTimestamp) isTransactionOptions_ReadOnly_TimestampBound()    {}
func (*TransactionOptions_ReadOnly_ExactStaleness) isTransactionOptions_ReadOnly_TimestampBound()   {}

func (m *TransactionOptions_ReadOnly) GetTimestampBound() isTransactionOptions_ReadOnly_TimestampBound {
        if m != nil {
                return m.TimestampBound
        }
        return nil
}

func (m *TransactionOptions_ReadOnly) GetStrong() bool {
        if x, ok := m.GetTimestampBound().(*TransactionOptions_ReadOnly_Strong); ok {
                return x.Strong
        }
        return false
}

func (m *TransactionOptions_ReadOnly) GetMinReadTimestamp() *google_protobuf3.Timestamp {
        if x, ok := m.GetTimestampBound().(*TransactionOptions_ReadOnly_MinReadTimestamp); ok {
                return x.MinReadTimestamp
        }
        return nil
}

func (m *TransactionOptions_ReadOnly) GetMaxStaleness() *google_protobuf2.Duration {
        if x, ok := m.GetTimestampBound().(*TransactionOptions_ReadOnly_MaxStaleness); ok {
                return x.MaxStaleness
        }
        return nil
}

func (m *TransactionOptions_ReadOnly) GetReadTimestamp() *google_protobuf3.Timestamp {
        if x, ok := m.GetTimestampBound().(*TransactionOptions_ReadOnly_ReadTimestamp); ok {
                return x.ReadTimestamp
        }
        return nil
}

func (m *TransactionOptions_ReadOnly) GetExactStaleness() *google_protobuf2.Duration {
        if x, ok := m.GetTimestampBound().(*TransactionOptions_ReadOnly_ExactStaleness); ok {
                return x.ExactStaleness
        }
        return nil
}

func (m *TransactionOptions_ReadOnly) GetReturnReadTimestamp() bool {
        if m != nil {
                return m.ReturnReadTimestamp
        }
        return false
}

// XXX_OneofFuncs is for the internal use of the proto package.
func (*TransactionOptions_ReadOnly) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
        return _TransactionOptions_ReadOnly_OneofMarshaler, _TransactionOptions_ReadOnly_OneofUnmarshaler, _TransactionOptions_ReadOnly_OneofSizer, []interface{}{
                (*TransactionOptions_ReadOnly_Strong)(nil),
                (*TransactionOptions_ReadOnly_MinReadTimestamp)(nil),
                (*TransactionOptions_ReadOnly_MaxStaleness)(nil),
                (*TransactionOptions_ReadOnly_ReadTimestamp)(nil),
                (*TransactionOptions_ReadOnly_ExactStaleness)(nil),
        }
}

func _TransactionOptions_ReadOnly_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
        m := msg.(*TransactionOptions_ReadOnly)
        // timestamp_bound
        switch x := m.TimestampBound.(type) {
        case *TransactionOptions_ReadOnly_Strong:
                t := uint64(0)
                if x.Strong {
                        t = 1
                }
                b.EncodeVarint(1<<3 | proto.WireVarint)
                b.EncodeVarint(t)
        case *TransactionOptions_ReadOnly_MinReadTimestamp:
                b.EncodeVarint(2<<3 | proto.WireBytes)
                if err := b.EncodeMessage(x.MinReadTimestamp); err != nil {
                        return err
                }
        case *TransactionOptions_ReadOnly_MaxStaleness:
                b.EncodeVarint(3<<3 | proto.WireBytes)
                if err := b.EncodeMessage(x.MaxStaleness); err != nil {
                        return err
                }
        case *TransactionOptions_ReadOnly_ReadTimestamp:
                b.EncodeVarint(4<<3 | proto.WireBytes)
                if err := b.EncodeMessage(x.ReadTimestamp); err != nil {
                        return err
                }
        case *TransactionOptions_ReadOnly_ExactStaleness:
                b.EncodeVarint(5<<3 | proto.WireBytes)
                if err := b.EncodeMessage(x.ExactStaleness); err != nil {
                        return err
                }
        case nil:
        default:
                return fmt.Errorf("TransactionOptions_ReadOnly.TimestampBound has unexpected type %T", x)
        }
        return nil
}

func _TransactionOptions_ReadOnly_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
        m := msg.(*TransactionOptions_ReadOnly)
        switch tag {
        case 1: // timestamp_bound.strong
                if wire != proto.WireVarint {
                        return true, proto.ErrInternalBadWireType
                }
                x, err := b.DecodeVarint()
                m.TimestampBound = &TransactionOptions_ReadOnly_Strong{x != 0}
                return true, err
        case 2: // timestamp_bound.min_read_timestamp
                if wire != proto.WireBytes {
                        return true, proto.ErrInternalBadWireType
                }
                msg := new(google_protobuf3.Timestamp)
                err := b.DecodeMessage(msg)
                m.TimestampBound = &TransactionOptions_ReadOnly_MinReadTimestamp{msg}
                return true, err
        case 3: // timestamp_bound.max_staleness
                if wire != proto.WireBytes {
                        return true, proto.ErrInternalBadWireType
                }
                msg := new(google_protobuf2.Duration)
                err := b.DecodeMessage(msg)
                m.TimestampBound = &TransactionOptions_ReadOnly_MaxStaleness{msg}
                return true, err
        case 4: // timestamp_bound.read_timestamp
                if wire != proto.WireBytes {
                        return true, proto.ErrInternalBadWireType
                }
                msg := new(google_protobuf3.Timestamp)
                err := b.DecodeMessage(msg)
                m.TimestampBound = &TransactionOptions_ReadOnly_ReadTimestamp{msg}
                return true, err
        case 5: // timestamp_bound.exact_staleness
                if wire != proto.WireBytes {
                        return true, proto.ErrInternalBadWireType
                }
                msg := new(google_protobuf2.Duration)
                err := b.DecodeMessage(msg)
                m.TimestampBound = &TransactionOptions_ReadOnly_ExactStaleness{msg}
                return true, err
        default:
                return false, nil
        }
}

func _TransactionOptions_ReadOnly_OneofSizer(msg proto.Message) (n int) {
        m := msg.(*TransactionOptions_ReadOnly)
        // timestamp_bound
        switch x := m.TimestampBound.(type) {
        case *TransactionOptions_ReadOnly_Strong:
                n += proto.SizeVarint(1<<3 | proto.WireVarint)
                n += 1
        case *TransactionOptions_ReadOnly_MinReadTimestamp:
                s := proto.Size(x.MinReadTimestamp)
                n += proto.SizeVarint(2<<3 | proto.WireBytes)
                n += proto.SizeVarint(uint64(s))
                n += s
        case *TransactionOptions_ReadOnly_MaxStaleness:
                s := proto.Size(x.MaxStaleness)
                n += proto.SizeVarint(3<<3 | proto.WireBytes)
                n += proto.SizeVarint(uint64(s))
                n += s
        case *TransactionOptions_ReadOnly_ReadTimestamp:
                s := proto.Size(x.ReadTimestamp)
                n += proto.SizeVarint(4<<3 | proto.WireBytes)
                n += proto.SizeVarint(uint64(s))
                n += s
        case *TransactionOptions_ReadOnly_ExactStaleness:
                s := proto.Size(x.ExactStaleness)
                n += proto.SizeVarint(5<<3 | proto.WireBytes)
                n += proto.SizeVarint(uint64(s))
                n += s
        case nil:
        default:
                panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
        }
        return n
}

// A transaction.
type Transaction struct {
        // `id` may be used to identify the transaction in subsequent
        // [Read][google.spanner.v1.Spanner.Read],
        // [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql],
        // [Commit][google.spanner.v1.Spanner.Commit], or
        // [Rollback][google.spanner.v1.Spanner.Rollback] calls.
        //
        // Single-use read-only transactions do not have IDs, because
        // single-use transactions do not support multiple requests.
        Id []byte `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
        // For snapshot read-only transactions, the read timestamp chosen
        // for the transaction. Not returned by default: see
        // [TransactionOptions.ReadOnly.return_read_timestamp][google.spanner.v1.TransactionOptions.ReadOnly.return_read_timestamp].
        ReadTimestamp *google_protobuf3.Timestamp `protobuf:"bytes,2,opt,name=read_timestamp,json=readTimestamp" json:"read_timestamp,omitempty"`
}

func (m *Transaction) Reset()                    { *m = Transaction{} }
func (m *Transaction) String() string            { return proto.CompactTextString(m) }
func (*Transaction) ProtoMessage()               {}
func (*Transaction) Descriptor() ([]byte, []int) { return fileDescriptor5, []int{1} }

func (m *Transaction) GetId() []byte {
        if m != nil {
                return m.Id
        }
        return nil
}

func (m *Transaction) GetReadTimestamp() *google_protobuf3.Timestamp {
        if m != nil {
                return m.ReadTimestamp
        }
        return nil
}

// This message is used to select the transaction in which a
// [Read][google.spanner.v1.Spanner.Read] or
// [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] call runs.
//
// See [TransactionOptions][google.spanner.v1.TransactionOptions] for more information about transactions.
type TransactionSelector struct {
        // If no fields are set, the default is a single use transaction
        // with strong concurrency.
        //
        // Types that are valid to be assigned to Selector:
        //      *TransactionSelector_SingleUse
        //      *TransactionSelector_Id
        //      *TransactionSelector_Begin
        Selector isTransactionSelector_Selector `protobuf_oneof:"selector"`
}

func (m *TransactionSelector) Reset()                    { *m = TransactionSelector{} }
func (m *TransactionSelector) String() string            { return proto.CompactTextString(m) }
func (*TransactionSelector) ProtoMessage()               {}
func (*TransactionSelector) Descriptor() ([]byte, []int) { return fileDescriptor5, []int{2} }

type isTransactionSelector_Selector interface {
        isTransactionSelector_Selector()
}

type TransactionSelector_SingleUse struct {
        SingleUse *TransactionOptions `protobuf:"bytes,1,opt,name=single_use,json=singleUse,oneof"`
}
type TransactionSelector_Id struct {
        Id []byte `protobuf:"bytes,2,opt,name=id,proto3,oneof"`
}
type TransactionSelector_Begin struct {
        Begin *TransactionOptions `protobuf:"bytes,3,opt,name=begin,oneof"`
}

func (*TransactionSelector_SingleUse) isTransactionSelector_Selector() {}
func (*TransactionSelector_Id) isTransactionSelector_Selector()        {}
func (*TransactionSelector_Begin) isTransactionSelector_Selector()     {}

func (m *TransactionSelector) GetSelector() isTransactionSelector_Selector {
        if m != nil {
                return m.Selector
        }
        return nil
}

func (m *TransactionSelector) GetSingleUse() *TransactionOptions {
        if x, ok := m.GetSelector().(*TransactionSelector_SingleUse); ok {
                return x.SingleUse
        }
        return nil
}

func (m *TransactionSelector) GetId() []byte {
        if x, ok := m.GetSelector().(*TransactionSelector_Id); ok {
                return x.Id
        }
        return nil
}

func (m *TransactionSelector) GetBegin() *TransactionOptions {
        if x, ok := m.GetSelector().(*TransactionSelector_Begin); ok {
                return x.Begin
        }
        return nil
}

// XXX_OneofFuncs is for the internal use of the proto package.
func (*TransactionSelector) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
        return _TransactionSelector_OneofMarshaler, _TransactionSelector_OneofUnmarshaler, _TransactionSelector_OneofSizer, []interface{}{
                (*TransactionSelector_SingleUse)(nil),
                (*TransactionSelector_Id)(nil),
                (*TransactionSelector_Begin)(nil),
        }
}

func _TransactionSelector_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
        m := msg.(*TransactionSelector)
        // selector
        switch x := m.Selector.(type) {
        case *TransactionSelector_SingleUse:
                b.EncodeVarint(1<<3 | proto.WireBytes)
                if err := b.EncodeMessage(x.SingleUse); err != nil {
                        return err
                }
        case *TransactionSelector_Id:
                b.EncodeVarint(2<<3 | proto.WireBytes)
                b.EncodeRawBytes(x.Id)
        case *TransactionSelector_Begin:
                b.EncodeVarint(3<<3 | proto.WireBytes)
                if err := b.EncodeMessage(x.Begin); err != nil {
                        return err
                }
        case nil:
        default:
                return fmt.Errorf("TransactionSelector.Selector has unexpected type %T", x)
        }
        return nil
}

func _TransactionSelector_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
        m := msg.(*TransactionSelector)
        switch tag {
        case 1: // selector.single_use
                if wire != proto.WireBytes {
                        return true, proto.ErrInternalBadWireType
                }
                msg := new(TransactionOptions)
                err := b.DecodeMessage(msg)
                m.Selector = &TransactionSelector_SingleUse{msg}
                return true, err
        case 2: // selector.id
                if wire != proto.WireBytes {
                        return true, proto.ErrInternalBadWireType
                }
                x, err := b.DecodeRawBytes(true)
                m.Selector = &TransactionSelector_Id{x}
                return true, err
        case 3: // selector.begin
                if wire != proto.WireBytes {
                        return true, proto.ErrInternalBadWireType
                }
                msg := new(TransactionOptions)
                err := b.DecodeMessage(msg)
                m.Selector = &TransactionSelector_Begin{msg}
                return true, err
        default:
                return false, nil
        }
}

func _TransactionSelector_OneofSizer(msg proto.Message) (n int) {
        m := msg.(*TransactionSelector)
        // selector
        switch x := m.Selector.(type) {
        case *TransactionSelector_SingleUse:
                s := proto.Size(x.SingleUse)
                n += proto.SizeVarint(1<<3 | proto.WireBytes)
                n += proto.SizeVarint(uint64(s))
                n += s
        case *TransactionSelector_Id:
                n += proto.SizeVarint(2<<3 | proto.WireBytes)
                n += proto.SizeVarint(uint64(len(x.Id)))
                n += len(x.Id)
        case *TransactionSelector_Begin:
                s := proto.Size(x.Begin)
                n += proto.SizeVarint(3<<3 | proto.WireBytes)
                n += proto.SizeVarint(uint64(s))
                n += s
        case nil:
        default:
                panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
        }
        return n
}

func init() {
        proto.RegisterType((*TransactionOptions)(nil), "google.spanner.v1.TransactionOptions")
        proto.RegisterType((*TransactionOptions_ReadWrite)(nil), "google.spanner.v1.TransactionOptions.ReadWrite")
        proto.RegisterType((*TransactionOptions_ReadOnly)(nil), "google.spanner.v1.TransactionOptions.ReadOnly")
        proto.RegisterType((*Transaction)(nil), "google.spanner.v1.Transaction")
        proto.RegisterType((*TransactionSelector)(nil), "google.spanner.v1.TransactionSelector")
}

func init() { proto.RegisterFile("google/spanner/v1/transaction.proto", fileDescriptor5) }

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