mirror of
https://github.com/go-gitea/gitea
synced 2024-08-19 13:50:42 +02:00
617 lines
14 KiB
Go
617 lines
14 KiB
Go
package mssql
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"encoding/binary"
|
|
"fmt"
|
|
"math"
|
|
"reflect"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
type Bulk struct {
|
|
cn *Conn
|
|
metadata []columnStruct
|
|
bulkColumns []columnStruct
|
|
columnsName []string
|
|
tablename string
|
|
numRows int
|
|
|
|
headerSent bool
|
|
Options BulkOptions
|
|
Debug bool
|
|
}
|
|
type BulkOptions struct {
|
|
CheckConstraints bool
|
|
FireTriggers bool
|
|
KeepNulls bool
|
|
KilobytesPerBatch int
|
|
RowsPerBatch int
|
|
Order []string
|
|
Tablock bool
|
|
}
|
|
|
|
type DataValue interface{}
|
|
|
|
func (cn *Conn) CreateBulk(table string, columns []string) (_ *Bulk) {
|
|
b := Bulk{cn: cn, tablename: table, headerSent: false, columnsName: columns}
|
|
b.Debug = false
|
|
return &b
|
|
}
|
|
|
|
func (b *Bulk) sendBulkCommand() (err error) {
|
|
//get table columns info
|
|
err = b.getMetadata()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
//match the columns
|
|
for _, colname := range b.columnsName {
|
|
var bulkCol *columnStruct
|
|
|
|
for _, m := range b.metadata {
|
|
if m.ColName == colname {
|
|
bulkCol = &m
|
|
break
|
|
}
|
|
}
|
|
if bulkCol != nil {
|
|
|
|
if bulkCol.ti.TypeId == typeUdt {
|
|
//send udt as binary
|
|
bulkCol.ti.TypeId = typeBigVarBin
|
|
}
|
|
b.bulkColumns = append(b.bulkColumns, *bulkCol)
|
|
b.dlogf("Adding column %s %s %#x", colname, bulkCol.ColName, bulkCol.ti.TypeId)
|
|
} else {
|
|
return fmt.Errorf("Column %s does not exist in destination table %s", colname, b.tablename)
|
|
}
|
|
}
|
|
|
|
//create the bulk command
|
|
|
|
//columns definitions
|
|
var col_defs bytes.Buffer
|
|
for i, col := range b.bulkColumns {
|
|
if i != 0 {
|
|
col_defs.WriteString(", ")
|
|
}
|
|
col_defs.WriteString("[" + col.ColName + "] " + makeDecl(col.ti))
|
|
}
|
|
|
|
//options
|
|
var with_opts []string
|
|
|
|
if b.Options.CheckConstraints {
|
|
with_opts = append(with_opts, "CHECK_CONSTRAINTS")
|
|
}
|
|
if b.Options.FireTriggers {
|
|
with_opts = append(with_opts, "FIRE_TRIGGERS")
|
|
}
|
|
if b.Options.KeepNulls {
|
|
with_opts = append(with_opts, "KEEP_NULLS")
|
|
}
|
|
if b.Options.KilobytesPerBatch > 0 {
|
|
with_opts = append(with_opts, fmt.Sprintf("KILOBYTES_PER_BATCH = %d", b.Options.KilobytesPerBatch))
|
|
}
|
|
if b.Options.RowsPerBatch > 0 {
|
|
with_opts = append(with_opts, fmt.Sprintf("ROWS_PER_BATCH = %d", b.Options.RowsPerBatch))
|
|
}
|
|
if len(b.Options.Order) > 0 {
|
|
with_opts = append(with_opts, fmt.Sprintf("ORDER(%s)", strings.Join(b.Options.Order, ",")))
|
|
}
|
|
if b.Options.Tablock {
|
|
with_opts = append(with_opts, "TABLOCK")
|
|
}
|
|
var with_part string
|
|
if len(with_opts) > 0 {
|
|
with_part = fmt.Sprintf("WITH (%s)", strings.Join(with_opts, ","))
|
|
}
|
|
|
|
query := fmt.Sprintf("INSERT BULK %s (%s) %s", b.tablename, col_defs.String(), with_part)
|
|
|
|
stmt, err := b.cn.Prepare(query)
|
|
if err != nil {
|
|
return fmt.Errorf("Prepare failed: %s", err.Error())
|
|
}
|
|
b.dlogf(query)
|
|
|
|
_, err = stmt.Exec(nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
b.headerSent = true
|
|
|
|
var buf = b.cn.sess.buf
|
|
buf.BeginPacket(packBulkLoadBCP)
|
|
|
|
// send the columns metadata
|
|
columnMetadata := b.createColMetadata()
|
|
_, err = buf.Write(columnMetadata)
|
|
|
|
return
|
|
}
|
|
|
|
// AddRow immediately writes the row to the destination table.
|
|
// The arguments are the row values in the order they were specified.
|
|
func (b *Bulk) AddRow(row []interface{}) (err error) {
|
|
if !b.headerSent {
|
|
err = b.sendBulkCommand()
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
|
|
if len(row) != len(b.bulkColumns) {
|
|
return fmt.Errorf("Row does not have the same number of columns than the destination table %d %d",
|
|
len(row), len(b.bulkColumns))
|
|
}
|
|
|
|
bytes, err := b.makeRowData(row)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
_, err = b.cn.sess.buf.Write(bytes)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
b.numRows = b.numRows + 1
|
|
return
|
|
}
|
|
|
|
func (b *Bulk) makeRowData(row []interface{}) ([]byte, error) {
|
|
buf := new(bytes.Buffer)
|
|
buf.WriteByte(byte(tokenRow))
|
|
|
|
var logcol bytes.Buffer
|
|
for i, col := range b.bulkColumns {
|
|
|
|
if b.Debug {
|
|
logcol.WriteString(fmt.Sprintf(" col[%d]='%v' ", i, row[i]))
|
|
}
|
|
param, err := b.makeParam(row[i], col)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("bulkcopy: %s", err.Error())
|
|
}
|
|
|
|
if col.ti.Writer == nil {
|
|
return nil, fmt.Errorf("no writer for column: %s, TypeId: %#x",
|
|
col.ColName, col.ti.TypeId)
|
|
}
|
|
err = col.ti.Writer(buf, param.ti, param.buffer)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("bulkcopy: %s", err.Error())
|
|
}
|
|
}
|
|
|
|
b.dlogf("row[%d] %s\n", b.numRows, logcol.String())
|
|
|
|
return buf.Bytes(), nil
|
|
}
|
|
|
|
func (b *Bulk) Done() (rowcount int64, err error) {
|
|
if b.headerSent == false {
|
|
//no rows had been sent
|
|
return 0, nil
|
|
}
|
|
var buf = b.cn.sess.buf
|
|
buf.WriteByte(byte(tokenDone))
|
|
|
|
binary.Write(buf, binary.LittleEndian, uint16(doneFinal))
|
|
binary.Write(buf, binary.LittleEndian, uint16(0)) // curcmd
|
|
|
|
if b.cn.sess.loginAck.TDSVersion >= verTDS72 {
|
|
binary.Write(buf, binary.LittleEndian, uint64(0)) //rowcount 0
|
|
} else {
|
|
binary.Write(buf, binary.LittleEndian, uint32(0)) //rowcount 0
|
|
}
|
|
|
|
buf.FinishPacket()
|
|
|
|
tokchan := make(chan tokenStruct, 5)
|
|
go processResponse(context.Background(), b.cn.sess, tokchan, nil)
|
|
|
|
var rowCount int64
|
|
for token := range tokchan {
|
|
switch token := token.(type) {
|
|
case doneStruct:
|
|
if token.Status&doneCount != 0 {
|
|
rowCount = int64(token.RowCount)
|
|
}
|
|
if token.isError() {
|
|
return 0, token.getError()
|
|
}
|
|
case error:
|
|
return 0, b.cn.checkBadConn(token)
|
|
}
|
|
}
|
|
return rowCount, nil
|
|
}
|
|
|
|
func (b *Bulk) createColMetadata() []byte {
|
|
buf := new(bytes.Buffer)
|
|
buf.WriteByte(byte(tokenColMetadata)) // token
|
|
binary.Write(buf, binary.LittleEndian, uint16(len(b.bulkColumns))) // column count
|
|
|
|
for i, col := range b.bulkColumns {
|
|
|
|
if b.cn.sess.loginAck.TDSVersion >= verTDS72 {
|
|
binary.Write(buf, binary.LittleEndian, uint32(col.UserType)) // usertype, always 0?
|
|
} else {
|
|
binary.Write(buf, binary.LittleEndian, uint16(col.UserType))
|
|
}
|
|
binary.Write(buf, binary.LittleEndian, uint16(col.Flags))
|
|
|
|
writeTypeInfo(buf, &b.bulkColumns[i].ti)
|
|
|
|
if col.ti.TypeId == typeNText ||
|
|
col.ti.TypeId == typeText ||
|
|
col.ti.TypeId == typeImage {
|
|
|
|
tablename_ucs2 := str2ucs2(b.tablename)
|
|
binary.Write(buf, binary.LittleEndian, uint16(len(tablename_ucs2)/2))
|
|
buf.Write(tablename_ucs2)
|
|
}
|
|
colname_ucs2 := str2ucs2(col.ColName)
|
|
buf.WriteByte(uint8(len(colname_ucs2) / 2))
|
|
buf.Write(colname_ucs2)
|
|
}
|
|
|
|
return buf.Bytes()
|
|
}
|
|
|
|
func (b *Bulk) getMetadata() (err error) {
|
|
stmt, err := b.cn.Prepare("SET FMTONLY ON")
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
_, err = stmt.Exec(nil)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
//get columns info
|
|
stmt, err = b.cn.Prepare(fmt.Sprintf("select * from %s SET FMTONLY OFF", b.tablename))
|
|
if err != nil {
|
|
return
|
|
}
|
|
stmt2 := stmt.(*Stmt)
|
|
cols, err := stmt2.QueryMeta()
|
|
if err != nil {
|
|
return fmt.Errorf("get columns info failed: %v", err.Error())
|
|
}
|
|
b.metadata = cols
|
|
|
|
if b.Debug {
|
|
for _, col := range b.metadata {
|
|
b.dlogf("col: %s typeId: %#x size: %d scale: %d prec: %d flags: %d lcid: %#x\n",
|
|
col.ColName, col.ti.TypeId, col.ti.Size, col.ti.Scale, col.ti.Prec,
|
|
col.Flags, col.ti.Collation.LcidAndFlags)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// QueryMeta is almost the same as mssql.Stmt.Query, but returns all the columns info.
|
|
func (s *Stmt) QueryMeta() (cols []columnStruct, err error) {
|
|
if err = s.sendQuery(nil); err != nil {
|
|
return
|
|
}
|
|
tokchan := make(chan tokenStruct, 5)
|
|
go processResponse(context.Background(), s.c.sess, tokchan, s.c.outs)
|
|
s.c.clearOuts()
|
|
loop:
|
|
for tok := range tokchan {
|
|
switch token := tok.(type) {
|
|
case doneStruct:
|
|
break loop
|
|
case []columnStruct:
|
|
cols = token
|
|
break loop
|
|
case error:
|
|
return nil, s.c.checkBadConn(token)
|
|
}
|
|
}
|
|
return cols, nil
|
|
}
|
|
|
|
func (b *Bulk) makeParam(val DataValue, col columnStruct) (res Param, err error) {
|
|
res.ti.Size = col.ti.Size
|
|
res.ti.TypeId = col.ti.TypeId
|
|
|
|
if val == nil {
|
|
res.ti.Size = 0
|
|
return
|
|
}
|
|
|
|
switch col.ti.TypeId {
|
|
|
|
case typeInt1, typeInt2, typeInt4, typeInt8, typeIntN:
|
|
var intvalue int64
|
|
|
|
switch val := val.(type) {
|
|
case int:
|
|
intvalue = int64(val)
|
|
case int32:
|
|
intvalue = int64(val)
|
|
case int64:
|
|
intvalue = val
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for int column")
|
|
return
|
|
}
|
|
|
|
res.buffer = make([]byte, res.ti.Size)
|
|
if col.ti.Size == 1 {
|
|
res.buffer[0] = byte(intvalue)
|
|
} else if col.ti.Size == 2 {
|
|
binary.LittleEndian.PutUint16(res.buffer, uint16(intvalue))
|
|
} else if col.ti.Size == 4 {
|
|
binary.LittleEndian.PutUint32(res.buffer, uint32(intvalue))
|
|
} else if col.ti.Size == 8 {
|
|
binary.LittleEndian.PutUint64(res.buffer, uint64(intvalue))
|
|
}
|
|
case typeFlt4, typeFlt8, typeFltN:
|
|
var floatvalue float64
|
|
|
|
switch val := val.(type) {
|
|
case float32:
|
|
floatvalue = float64(val)
|
|
case float64:
|
|
floatvalue = val
|
|
case int:
|
|
floatvalue = float64(val)
|
|
case int64:
|
|
floatvalue = float64(val)
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for float column: %s", val)
|
|
return
|
|
}
|
|
|
|
if col.ti.Size == 4 {
|
|
res.buffer = make([]byte, 4)
|
|
binary.LittleEndian.PutUint32(res.buffer, math.Float32bits(float32(floatvalue)))
|
|
} else if col.ti.Size == 8 {
|
|
res.buffer = make([]byte, 8)
|
|
binary.LittleEndian.PutUint64(res.buffer, math.Float64bits(floatvalue))
|
|
}
|
|
case typeNVarChar, typeNText, typeNChar:
|
|
|
|
switch val := val.(type) {
|
|
case string:
|
|
res.buffer = str2ucs2(val)
|
|
case []byte:
|
|
res.buffer = val
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for nvarchar column: %s", val)
|
|
return
|
|
}
|
|
res.ti.Size = len(res.buffer)
|
|
|
|
case typeVarChar, typeBigVarChar, typeText, typeChar, typeBigChar:
|
|
switch val := val.(type) {
|
|
case string:
|
|
res.buffer = []byte(val)
|
|
case []byte:
|
|
res.buffer = val
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for varchar column: %s", val)
|
|
return
|
|
}
|
|
res.ti.Size = len(res.buffer)
|
|
|
|
case typeBit, typeBitN:
|
|
if reflect.TypeOf(val).Kind() != reflect.Bool {
|
|
err = fmt.Errorf("mssql: invalid type for bit column: %s", val)
|
|
return
|
|
}
|
|
res.ti.TypeId = typeBitN
|
|
res.ti.Size = 1
|
|
res.buffer = make([]byte, 1)
|
|
if val.(bool) {
|
|
res.buffer[0] = 1
|
|
}
|
|
|
|
case typeDateTime2N, typeDateTimeOffsetN:
|
|
switch val := val.(type) {
|
|
case time.Time:
|
|
days, ns := dateTime2(val)
|
|
ns /= int64(math.Pow10(int(col.ti.Scale)*-1) * 1000000000)
|
|
|
|
var data = make([]byte, 5)
|
|
|
|
data[0] = byte(ns)
|
|
data[1] = byte(ns >> 8)
|
|
data[2] = byte(ns >> 16)
|
|
data[3] = byte(ns >> 24)
|
|
data[4] = byte(ns >> 32)
|
|
|
|
if col.ti.Scale <= 2 {
|
|
res.ti.Size = 6
|
|
} else if col.ti.Scale <= 4 {
|
|
res.ti.Size = 7
|
|
} else {
|
|
res.ti.Size = 8
|
|
}
|
|
var buf []byte
|
|
buf = make([]byte, res.ti.Size)
|
|
copy(buf, data[0:res.ti.Size-3])
|
|
|
|
buf[res.ti.Size-3] = byte(days)
|
|
buf[res.ti.Size-2] = byte(days >> 8)
|
|
buf[res.ti.Size-1] = byte(days >> 16)
|
|
|
|
if col.ti.TypeId == typeDateTimeOffsetN {
|
|
_, offset := val.Zone()
|
|
var offsetMinute = uint16(offset / 60)
|
|
buf = append(buf, byte(offsetMinute))
|
|
buf = append(buf, byte(offsetMinute>>8))
|
|
res.ti.Size = res.ti.Size + 2
|
|
}
|
|
|
|
res.buffer = buf
|
|
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for datetime2 column: %s", val)
|
|
return
|
|
}
|
|
case typeDateN:
|
|
switch val := val.(type) {
|
|
case time.Time:
|
|
days, _ := dateTime2(val)
|
|
|
|
res.ti.Size = 3
|
|
res.buffer = make([]byte, 3)
|
|
res.buffer[0] = byte(days)
|
|
res.buffer[1] = byte(days >> 8)
|
|
res.buffer[2] = byte(days >> 16)
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for date column: %s", val)
|
|
return
|
|
}
|
|
case typeDateTime, typeDateTimeN, typeDateTim4:
|
|
switch val := val.(type) {
|
|
case time.Time:
|
|
if col.ti.Size == 4 {
|
|
res.ti.Size = 4
|
|
res.buffer = make([]byte, 4)
|
|
|
|
ref := time.Date(1900, 1, 1, 0, 0, 0, 0, time.UTC)
|
|
dur := val.Sub(ref)
|
|
days := dur / (24 * time.Hour)
|
|
if days < 0 {
|
|
err = fmt.Errorf("mssql: Date %s is out of range", val)
|
|
return
|
|
}
|
|
mins := val.Hour()*60 + val.Minute()
|
|
|
|
binary.LittleEndian.PutUint16(res.buffer[0:2], uint16(days))
|
|
binary.LittleEndian.PutUint16(res.buffer[2:4], uint16(mins))
|
|
} else if col.ti.Size == 8 {
|
|
res.ti.Size = 8
|
|
res.buffer = make([]byte, 8)
|
|
|
|
days := divFloor(val.Unix(), 24*60*60)
|
|
//25567 - number of days since Jan 1 1900 UTC to Jan 1 1970
|
|
days = days + 25567
|
|
tm := (val.Hour()*60*60+val.Minute()*60+val.Second())*300 + int(val.Nanosecond()/10000000*3)
|
|
|
|
binary.LittleEndian.PutUint32(res.buffer[0:4], uint32(days))
|
|
binary.LittleEndian.PutUint32(res.buffer[4:8], uint32(tm))
|
|
} else {
|
|
err = fmt.Errorf("mssql: invalid size of column")
|
|
}
|
|
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for datetime column: %s", val)
|
|
}
|
|
|
|
// case typeMoney, typeMoney4, typeMoneyN:
|
|
case typeDecimal, typeDecimalN, typeNumeric, typeNumericN:
|
|
var value float64
|
|
switch v := val.(type) {
|
|
case int:
|
|
value = float64(v)
|
|
case int8:
|
|
value = float64(v)
|
|
case int16:
|
|
value = float64(v)
|
|
case int32:
|
|
value = float64(v)
|
|
case int64:
|
|
value = float64(v)
|
|
case float32:
|
|
value = float64(v)
|
|
case float64:
|
|
value = v
|
|
case string:
|
|
if value, err = strconv.ParseFloat(v, 64); err != nil {
|
|
return res, fmt.Errorf("bulk: unable to convert string to float: %v", err)
|
|
}
|
|
default:
|
|
return res, fmt.Errorf("unknown value for decimal: %#v", v)
|
|
}
|
|
|
|
perc := col.ti.Prec
|
|
scale := col.ti.Scale
|
|
var dec Decimal
|
|
dec, err = Float64ToDecimalScale(value, scale)
|
|
if err != nil {
|
|
return res, err
|
|
}
|
|
dec.prec = perc
|
|
|
|
var length byte
|
|
switch {
|
|
case perc <= 9:
|
|
length = 4
|
|
case perc <= 19:
|
|
length = 8
|
|
case perc <= 28:
|
|
length = 12
|
|
default:
|
|
length = 16
|
|
}
|
|
|
|
buf := make([]byte, length+1)
|
|
// first byte length written by typeInfo.writer
|
|
res.ti.Size = int(length) + 1
|
|
// second byte sign
|
|
if value < 0 {
|
|
buf[0] = 0
|
|
} else {
|
|
buf[0] = 1
|
|
}
|
|
|
|
ub := dec.UnscaledBytes()
|
|
l := len(ub)
|
|
if l > int(length) {
|
|
err = fmt.Errorf("decimal out of range: %s", dec)
|
|
return res, err
|
|
}
|
|
// reverse the bytes
|
|
for i, j := 1, l-1; j >= 0; i, j = i+1, j-1 {
|
|
buf[i] = ub[j]
|
|
}
|
|
res.buffer = buf
|
|
case typeBigVarBin:
|
|
switch val := val.(type) {
|
|
case []byte:
|
|
res.ti.Size = len(val)
|
|
res.buffer = val
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for Binary column: %s", val)
|
|
return
|
|
}
|
|
case typeGuid:
|
|
switch val := val.(type) {
|
|
case []byte:
|
|
res.ti.Size = len(val)
|
|
res.buffer = val
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for Guid column: %s", val)
|
|
return
|
|
}
|
|
|
|
default:
|
|
err = fmt.Errorf("mssql: type %x not implemented", col.ti.TypeId)
|
|
}
|
|
return
|
|
|
|
}
|
|
|
|
func (b *Bulk) dlogf(format string, v ...interface{}) {
|
|
if b.Debug {
|
|
b.cn.sess.log.Printf(format, v...)
|
|
}
|
|
}
|