78e5317242
* New driver does not tolerate USE - handle this by closing db and reopening db in the new dbname
111 lines
2.5 KiB
Go
Vendored
111 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()
|
|
}
|