forgejo-federation/vendor/github.com/denisenkom/go-mssqldb/tran.go
zeripath 78e5317242
Update to latest mssqldriver (#7613)
* New driver does not tolerate USE - handle this by closing db and reopening db in the new dbname
2019-07-26 05:10:20 +01:00

110 lines
2.5 KiB
Go
Vendored

package mssql
// Transaction Manager requests
// http://msdn.microsoft.com/en-us/library/dd339887.aspx
import (
"encoding/binary"
)
const (
tmGetDtcAddr = 0
tmPropagateXact = 1
tmBeginXact = 5
tmPromoteXact = 6
tmCommitXact = 7
tmRollbackXact = 8
tmSaveXact = 9
)
type isoLevel uint8
const (
isolationUseCurrent isoLevel = 0
isolationReadUncommited = 1
isolationReadCommited = 2
isolationRepeatableRead = 3
isolationSerializable = 4
isolationSnapshot = 5
)
func sendBeginXact(buf *tdsBuffer, headers []headerStruct, isolation isoLevel, name string, resetSession bool) (err error) {
buf.BeginPacket(packTransMgrReq, resetSession)
writeAllHeaders(buf, headers)
var rqtype uint16 = tmBeginXact
err = binary.Write(buf, binary.LittleEndian, &rqtype)
if err != nil {
return
}
err = binary.Write(buf, binary.LittleEndian, &isolation)
if err != nil {
return
}
err = writeBVarChar(buf, name)
if err != nil {
return
}
return buf.FinishPacket()
}
const (
fBeginXact = 1
)
func sendCommitXact(buf *tdsBuffer, headers []headerStruct, name string, flags uint8, isolation uint8, newname string, resetSession bool) error {
buf.BeginPacket(packTransMgrReq, resetSession)
writeAllHeaders(buf, headers)
var rqtype uint16 = tmCommitXact
err := binary.Write(buf, binary.LittleEndian, &rqtype)
if err != nil {
return err
}
err = writeBVarChar(buf, name)
if err != nil {
return err
}
err = binary.Write(buf, binary.LittleEndian, &flags)
if err != nil {
return err
}
if flags&fBeginXact != 0 {
err = binary.Write(buf, binary.LittleEndian, &isolation)
if err != nil {
return err
}
err = writeBVarChar(buf, name)
if err != nil {
return err
}
}
return buf.FinishPacket()
}
func sendRollbackXact(buf *tdsBuffer, headers []headerStruct, name string, flags uint8, isolation uint8, newname string, resetSession bool) error {
buf.BeginPacket(packTransMgrReq, resetSession)
writeAllHeaders(buf, headers)
var rqtype uint16 = tmRollbackXact
err := binary.Write(buf, binary.LittleEndian, &rqtype)
if err != nil {
return err
}
err = writeBVarChar(buf, name)
if err != nil {
return err
}
err = binary.Write(buf, binary.LittleEndian, &flags)
if err != nil {
return err
}
if flags&fBeginXact != 0 {
err = binary.Write(buf, binary.LittleEndian, &isolation)
if err != nil {
return err
}
err = writeBVarChar(buf, name)
if err != nil {
return err
}
}
return buf.FinishPacket()
}