mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-08-27 23:17:54 +02:00
465 lines
9.8 KiB
Go
465 lines
9.8 KiB
Go
|
package mssql
|
||
|
|
||
|
import (
|
||
|
"database/sql"
|
||
|
"database/sql/driver"
|
||
|
"encoding/binary"
|
||
|
"errors"
|
||
|
"fmt"
|
||
|
"io"
|
||
|
"log"
|
||
|
"math"
|
||
|
"net"
|
||
|
"strings"
|
||
|
"time"
|
||
|
)
|
||
|
|
||
|
func init() {
|
||
|
sql.Register("mssql", &MssqlDriver{})
|
||
|
}
|
||
|
|
||
|
type MssqlDriver struct {
|
||
|
log *log.Logger
|
||
|
}
|
||
|
|
||
|
func (d *MssqlDriver) SetLogger(logger *log.Logger) {
|
||
|
d.log = logger
|
||
|
}
|
||
|
|
||
|
func CheckBadConn(err error) error {
|
||
|
if err == io.EOF {
|
||
|
return driver.ErrBadConn
|
||
|
}
|
||
|
|
||
|
switch e := err.(type) {
|
||
|
case net.Error:
|
||
|
if e.Timeout() {
|
||
|
return e
|
||
|
}
|
||
|
return driver.ErrBadConn
|
||
|
default:
|
||
|
return err
|
||
|
}
|
||
|
}
|
||
|
|
||
|
type MssqlConn struct {
|
||
|
sess *tdsSession
|
||
|
}
|
||
|
|
||
|
func (c *MssqlConn) Commit() error {
|
||
|
headers := []headerStruct{
|
||
|
{hdrtype: dataStmHdrTransDescr,
|
||
|
data: transDescrHdr{c.sess.tranid, 1}.pack()},
|
||
|
}
|
||
|
if err := sendCommitXact(c.sess.buf, headers, "", 0, 0, ""); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
tokchan := make(chan tokenStruct, 5)
|
||
|
go processResponse(c.sess, tokchan)
|
||
|
for tok := range tokchan {
|
||
|
switch token := tok.(type) {
|
||
|
case error:
|
||
|
return token
|
||
|
}
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (c *MssqlConn) Rollback() error {
|
||
|
headers := []headerStruct{
|
||
|
{hdrtype: dataStmHdrTransDescr,
|
||
|
data: transDescrHdr{c.sess.tranid, 1}.pack()},
|
||
|
}
|
||
|
if err := sendRollbackXact(c.sess.buf, headers, "", 0, 0, ""); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
tokchan := make(chan tokenStruct, 5)
|
||
|
go processResponse(c.sess, tokchan)
|
||
|
for tok := range tokchan {
|
||
|
switch token := tok.(type) {
|
||
|
case error:
|
||
|
return token
|
||
|
}
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (c *MssqlConn) Begin() (driver.Tx, error) {
|
||
|
headers := []headerStruct{
|
||
|
{hdrtype: dataStmHdrTransDescr,
|
||
|
data: transDescrHdr{0, 1}.pack()},
|
||
|
}
|
||
|
if err := sendBeginXact(c.sess.buf, headers, 0, ""); err != nil {
|
||
|
return nil, CheckBadConn(err)
|
||
|
}
|
||
|
tokchan := make(chan tokenStruct, 5)
|
||
|
go processResponse(c.sess, tokchan)
|
||
|
for tok := range tokchan {
|
||
|
switch token := tok.(type) {
|
||
|
case error:
|
||
|
if c.sess.tranid != 0 {
|
||
|
return nil, token
|
||
|
}
|
||
|
return nil, CheckBadConn(token)
|
||
|
}
|
||
|
}
|
||
|
// successful BEGINXACT request will return sess.tranid
|
||
|
// for started transaction
|
||
|
return c, nil
|
||
|
}
|
||
|
|
||
|
func (d *MssqlDriver) Open(dsn string) (driver.Conn, error) {
|
||
|
params, err := parseConnectParams(dsn)
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
|
||
|
sess, err := connect(params)
|
||
|
if err != nil {
|
||
|
// main server failed, try fail-over partner
|
||
|
if params.failOverPartner == "" {
|
||
|
return nil, err
|
||
|
}
|
||
|
|
||
|
params.host = params.failOverPartner
|
||
|
if params.failOverPort != 0 {
|
||
|
params.port = params.failOverPort
|
||
|
}
|
||
|
|
||
|
sess, err = connect(params)
|
||
|
if err != nil {
|
||
|
// fail-over partner also failed, now fail
|
||
|
return nil, err
|
||
|
}
|
||
|
}
|
||
|
|
||
|
conn := &MssqlConn{sess}
|
||
|
conn.sess.log = (*Logger)(d.log)
|
||
|
return conn, nil
|
||
|
}
|
||
|
|
||
|
func (c *MssqlConn) Close() error {
|
||
|
return c.sess.buf.transport.Close()
|
||
|
}
|
||
|
|
||
|
type MssqlStmt struct {
|
||
|
c *MssqlConn
|
||
|
query string
|
||
|
paramCount int
|
||
|
notifSub *queryNotifSub
|
||
|
}
|
||
|
|
||
|
type queryNotifSub struct {
|
||
|
msgText string
|
||
|
options string
|
||
|
timeout uint32
|
||
|
}
|
||
|
|
||
|
func (c *MssqlConn) Prepare(query string) (driver.Stmt, error) {
|
||
|
q, paramCount := parseParams(query)
|
||
|
return &MssqlStmt{c, q, paramCount, nil}, nil
|
||
|
}
|
||
|
|
||
|
func (s *MssqlStmt) Close() error {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (s *MssqlStmt) SetQueryNotification(id, options string, timeout time.Duration) {
|
||
|
to := uint32(timeout / time.Second)
|
||
|
if to < 1 {
|
||
|
to = 1
|
||
|
}
|
||
|
s.notifSub = &queryNotifSub{id, options, to}
|
||
|
}
|
||
|
|
||
|
func (s *MssqlStmt) NumInput() int {
|
||
|
return s.paramCount
|
||
|
}
|
||
|
|
||
|
func (s *MssqlStmt) sendQuery(args []driver.Value) (err error) {
|
||
|
headers := []headerStruct{
|
||
|
{hdrtype: dataStmHdrTransDescr,
|
||
|
data: transDescrHdr{s.c.sess.tranid, 1}.pack()},
|
||
|
}
|
||
|
|
||
|
if s.notifSub != nil {
|
||
|
headers = append(headers, headerStruct{hdrtype: dataStmHdrQueryNotif,
|
||
|
data: queryNotifHdr{s.notifSub.msgText, s.notifSub.options, s.notifSub.timeout}.pack()})
|
||
|
}
|
||
|
|
||
|
if len(args) != s.paramCount {
|
||
|
return errors.New(fmt.Sprintf("sql: expected %d parameters, got %d", s.paramCount, len(args)))
|
||
|
}
|
||
|
if s.c.sess.logFlags&logSQL != 0 {
|
||
|
s.c.sess.log.Println(s.query)
|
||
|
}
|
||
|
if s.c.sess.logFlags&logParams != 0 && len(args) > 0 {
|
||
|
for i := 0; i < len(args); i++ {
|
||
|
s.c.sess.log.Printf("\t@p%d\t%v\n", i+1, args[i])
|
||
|
}
|
||
|
|
||
|
}
|
||
|
if len(args) == 0 {
|
||
|
if err = sendSqlBatch72(s.c.sess.buf, s.query, headers); err != nil {
|
||
|
if s.c.sess.tranid != 0 {
|
||
|
return err
|
||
|
}
|
||
|
return CheckBadConn(err)
|
||
|
}
|
||
|
} else {
|
||
|
params := make([]Param, len(args)+2)
|
||
|
decls := make([]string, len(args))
|
||
|
params[0], err = s.makeParam(s.query)
|
||
|
if err != nil {
|
||
|
return
|
||
|
}
|
||
|
for i, val := range args {
|
||
|
params[i+2], err = s.makeParam(val)
|
||
|
if err != nil {
|
||
|
return
|
||
|
}
|
||
|
name := fmt.Sprintf("@p%d", i+1)
|
||
|
params[i+2].Name = name
|
||
|
decls[i] = fmt.Sprintf("%s %s", name, makeDecl(params[i+2].ti))
|
||
|
}
|
||
|
params[1], err = s.makeParam(strings.Join(decls, ","))
|
||
|
if err != nil {
|
||
|
return
|
||
|
}
|
||
|
if err = sendRpc(s.c.sess.buf, headers, Sp_ExecuteSql, 0, params); err != nil {
|
||
|
if s.c.sess.tranid != 0 {
|
||
|
return err
|
||
|
}
|
||
|
return CheckBadConn(err)
|
||
|
}
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func (s *MssqlStmt) Query(args []driver.Value) (res driver.Rows, err error) {
|
||
|
if err = s.sendQuery(args); err != nil {
|
||
|
return
|
||
|
}
|
||
|
tokchan := make(chan tokenStruct, 5)
|
||
|
go processResponse(s.c.sess, tokchan)
|
||
|
// process metadata
|
||
|
var cols []string
|
||
|
loop:
|
||
|
for tok := range tokchan {
|
||
|
switch token := tok.(type) {
|
||
|
// by ignoring DONE token we effectively
|
||
|
// skip empty result-sets
|
||
|
// this improves results in queryes like that:
|
||
|
// set nocount on; select 1
|
||
|
// see TestIgnoreEmptyResults test
|
||
|
//case doneStruct:
|
||
|
//break loop
|
||
|
case []columnStruct:
|
||
|
cols = make([]string, len(token))
|
||
|
for i, col := range token {
|
||
|
cols[i] = col.ColName
|
||
|
}
|
||
|
break loop
|
||
|
case error:
|
||
|
if s.c.sess.tranid != 0 {
|
||
|
return nil, token
|
||
|
}
|
||
|
return nil, CheckBadConn(token)
|
||
|
}
|
||
|
}
|
||
|
return &MssqlRows{sess: s.c.sess, tokchan: tokchan, cols: cols}, nil
|
||
|
}
|
||
|
|
||
|
func (s *MssqlStmt) Exec(args []driver.Value) (res driver.Result, err error) {
|
||
|
if err = s.sendQuery(args); err != nil {
|
||
|
return
|
||
|
}
|
||
|
tokchan := make(chan tokenStruct, 5)
|
||
|
go processResponse(s.c.sess, tokchan)
|
||
|
var rowCount int64
|
||
|
for token := range tokchan {
|
||
|
switch token := token.(type) {
|
||
|
case doneInProcStruct:
|
||
|
if token.Status&doneCount != 0 {
|
||
|
rowCount = int64(token.RowCount)
|
||
|
}
|
||
|
case doneStruct:
|
||
|
if token.Status&doneCount != 0 {
|
||
|
rowCount = int64(token.RowCount)
|
||
|
}
|
||
|
case error:
|
||
|
if s.c.sess.logFlags&logErrors != 0 {
|
||
|
s.c.sess.log.Println("got error:", token)
|
||
|
}
|
||
|
if s.c.sess.tranid != 0 {
|
||
|
return nil, token
|
||
|
}
|
||
|
return nil, CheckBadConn(token)
|
||
|
}
|
||
|
}
|
||
|
return &MssqlResult{s.c, rowCount}, nil
|
||
|
}
|
||
|
|
||
|
type MssqlRows struct {
|
||
|
sess *tdsSession
|
||
|
cols []string
|
||
|
tokchan chan tokenStruct
|
||
|
|
||
|
nextCols []string
|
||
|
}
|
||
|
|
||
|
func (rc *MssqlRows) Close() error {
|
||
|
for _ = range rc.tokchan {
|
||
|
}
|
||
|
rc.tokchan = nil
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (rc *MssqlRows) Columns() (res []string) {
|
||
|
return rc.cols
|
||
|
}
|
||
|
|
||
|
func (rc *MssqlRows) Next(dest []driver.Value) (err error) {
|
||
|
if rc.nextCols != nil {
|
||
|
return io.EOF
|
||
|
}
|
||
|
for tok := range rc.tokchan {
|
||
|
switch tokdata := tok.(type) {
|
||
|
case []columnStruct:
|
||
|
cols := make([]string, len(tokdata))
|
||
|
for i, col := range tokdata {
|
||
|
cols[i] = col.ColName
|
||
|
}
|
||
|
rc.nextCols = cols
|
||
|
return io.EOF
|
||
|
case []interface{}:
|
||
|
for i := range dest {
|
||
|
dest[i] = tokdata[i]
|
||
|
}
|
||
|
return nil
|
||
|
case error:
|
||
|
return tokdata
|
||
|
}
|
||
|
}
|
||
|
return io.EOF
|
||
|
}
|
||
|
|
||
|
func (rc *MssqlRows) HasNextResultSet() bool {
|
||
|
return rc.nextCols != nil
|
||
|
}
|
||
|
|
||
|
func (rc *MssqlRows) NextResultSet() error {
|
||
|
rc.cols = rc.nextCols
|
||
|
rc.nextCols = nil
|
||
|
if rc.cols == nil {
|
||
|
return io.EOF
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (s *MssqlStmt) makeParam(val driver.Value) (res Param, err error) {
|
||
|
if val == nil {
|
||
|
res.ti.TypeId = typeNVarChar
|
||
|
res.buffer = nil
|
||
|
res.ti.Size = 2
|
||
|
return
|
||
|
}
|
||
|
switch val := val.(type) {
|
||
|
case int64:
|
||
|
res.ti.TypeId = typeIntN
|
||
|
res.buffer = make([]byte, 8)
|
||
|
res.ti.Size = 8
|
||
|
binary.LittleEndian.PutUint64(res.buffer, uint64(val))
|
||
|
case float64:
|
||
|
res.ti.TypeId = typeFltN
|
||
|
res.ti.Size = 8
|
||
|
res.buffer = make([]byte, 8)
|
||
|
binary.LittleEndian.PutUint64(res.buffer, math.Float64bits(val))
|
||
|
case []byte:
|
||
|
res.ti.TypeId = typeBigVarBin
|
||
|
res.ti.Size = len(val)
|
||
|
res.buffer = val
|
||
|
case string:
|
||
|
res.ti.TypeId = typeNVarChar
|
||
|
res.buffer = str2ucs2(val)
|
||
|
res.ti.Size = len(res.buffer)
|
||
|
case bool:
|
||
|
res.ti.TypeId = typeBitN
|
||
|
res.ti.Size = 1
|
||
|
res.buffer = make([]byte, 1)
|
||
|
if val {
|
||
|
res.buffer[0] = 1
|
||
|
}
|
||
|
case time.Time:
|
||
|
if s.c.sess.loginAck.TDSVersion >= verTDS73 {
|
||
|
res.ti.TypeId = typeDateTimeOffsetN
|
||
|
res.ti.Scale = 7
|
||
|
res.ti.Size = 10
|
||
|
buf := make([]byte, 10)
|
||
|
res.buffer = buf
|
||
|
days, ns := dateTime2(val)
|
||
|
ns /= 100
|
||
|
buf[0] = byte(ns)
|
||
|
buf[1] = byte(ns >> 8)
|
||
|
buf[2] = byte(ns >> 16)
|
||
|
buf[3] = byte(ns >> 24)
|
||
|
buf[4] = byte(ns >> 32)
|
||
|
buf[5] = byte(days)
|
||
|
buf[6] = byte(days >> 8)
|
||
|
buf[7] = byte(days >> 16)
|
||
|
_, offset := val.Zone()
|
||
|
offset /= 60
|
||
|
buf[8] = byte(offset)
|
||
|
buf[9] = byte(offset >> 8)
|
||
|
} else {
|
||
|
res.ti.TypeId = typeDateTimeN
|
||
|
res.ti.Size = 8
|
||
|
res.buffer = make([]byte, 8)
|
||
|
ref := time.Date(1900, 1, 1, 0, 0, 0, 0, time.UTC)
|
||
|
dur := val.Sub(ref)
|
||
|
days := dur / (24 * time.Hour)
|
||
|
tm := (300 * (dur % (24 * time.Hour))) / time.Second
|
||
|
binary.LittleEndian.PutUint32(res.buffer[0:4], uint32(days))
|
||
|
binary.LittleEndian.PutUint32(res.buffer[4:8], uint32(tm))
|
||
|
}
|
||
|
default:
|
||
|
err = fmt.Errorf("mssql: unknown type for %T", val)
|
||
|
return
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
type MssqlResult struct {
|
||
|
c *MssqlConn
|
||
|
rowsAffected int64
|
||
|
}
|
||
|
|
||
|
func (r *MssqlResult) RowsAffected() (int64, error) {
|
||
|
return r.rowsAffected, nil
|
||
|
}
|
||
|
|
||
|
func (r *MssqlResult) LastInsertId() (int64, error) {
|
||
|
s, err := r.c.Prepare("select cast(@@identity as bigint)")
|
||
|
if err != nil {
|
||
|
return 0, err
|
||
|
}
|
||
|
defer s.Close()
|
||
|
rows, err := s.Query(nil)
|
||
|
if err != nil {
|
||
|
return 0, err
|
||
|
}
|
||
|
defer rows.Close()
|
||
|
dest := make([]driver.Value, 1)
|
||
|
err = rows.Next(dest)
|
||
|
if err != nil {
|
||
|
return 0, err
|
||
|
}
|
||
|
if dest[0] == nil {
|
||
|
return -1, errors.New("There is no generated identity value")
|
||
|
}
|
||
|
lastInsertId := dest[0].(int64)
|
||
|
return lastInsertId, nil
|
||
|
}
|