mirror of
https://github.com/go-gitea/gitea.git
synced 2024-11-04 08:17:24 -05:00
584 lines
14 KiB
Go
Vendored
584 lines
14 KiB
Go
Vendored
package mssql
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"encoding/binary"
|
|
"fmt"
|
|
"math"
|
|
"reflect"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/denisenkom/go-mssqldb/internal/decimal"
|
|
)
|
|
|
|
type Bulk struct {
|
|
// ctx is used only for AddRow and Done methods.
|
|
// This could be removed if AddRow and Done accepted
|
|
// a ctx field as well, which is available with the
|
|
// database/sql call.
|
|
ctx context.Context
|
|
|
|
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{}
|
|
|
|
const (
|
|
sqlDateFormat = "2006-01-02"
|
|
sqlTimeFormat = "2006-01-02 15:04:05.999999999Z07:00"
|
|
)
|
|
|
|
func (cn *Conn) CreateBulk(table string, columns []string) (_ *Bulk) {
|
|
b := Bulk{ctx: context.Background(), cn: cn, tablename: table, headerSent: false, columnsName: columns}
|
|
b.Debug = false
|
|
return &b
|
|
}
|
|
|
|
func (cn *Conn) CreateBulkContext(ctx context.Context, table string, columns []string) (_ *Bulk) {
|
|
b := Bulk{ctx: ctx, cn: cn, tablename: table, headerSent: false, columnsName: columns}
|
|
b.Debug = false
|
|
return &b
|
|
}
|
|
|
|
func (b *Bulk) sendBulkCommand(ctx context.Context) (err error) {
|
|
//get table columns info
|
|
err = b.getMetadata(ctx)
|
|
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.PrepareContext(ctx, query)
|
|
if err != nil {
|
|
return fmt.Errorf("Prepare failed: %s", err.Error())
|
|
}
|
|
b.dlogf(query)
|
|
|
|
_, err = stmt.(*Stmt).ExecContext(ctx, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
b.headerSent = true
|
|
|
|
var buf = b.cn.sess.buf
|
|
buf.BeginPacket(packBulkLoadBCP, false)
|
|
|
|
// 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(b.ctx)
|
|
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(b.ctx, 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(ctx context.Context) (err error) {
|
|
stmt, err := b.cn.prepareContext(ctx, "SET FMTONLY ON")
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
_, err = stmt.ExecContext(ctx, nil)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
// Get columns info.
|
|
stmt, err = b.cn.prepareContext(ctx, fmt.Sprintf("select * from %s SET FMTONLY OFF", b.tablename))
|
|
if err != nil {
|
|
return
|
|
}
|
|
rows, err := stmt.QueryContext(ctx, nil)
|
|
if err != nil {
|
|
return fmt.Errorf("get columns info failed: %v", err)
|
|
}
|
|
b.metadata = rows.(*Rows).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 rows.Close()
|
|
}
|
|
|
|
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: %T", val)
|
|
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: %T %s", val, 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: %T %s", val, 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: %T %s", val, 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: %T %s", val, val)
|
|
return
|
|
}
|
|
res.ti.TypeId = typeBitN
|
|
res.ti.Size = 1
|
|
res.buffer = make([]byte, 1)
|
|
if val.(bool) {
|
|
res.buffer[0] = 1
|
|
}
|
|
case typeDateTime2N:
|
|
switch val := val.(type) {
|
|
case time.Time:
|
|
res.buffer = encodeDateTime2(val, int(col.ti.Scale))
|
|
res.ti.Size = len(res.buffer)
|
|
case string:
|
|
var t time.Time
|
|
if t, err = time.Parse(sqlTimeFormat, val); err != nil {
|
|
return res, fmt.Errorf("bulk: unable to convert string to date: %v", err)
|
|
}
|
|
res.buffer = encodeDateTime2(t, int(col.ti.Scale))
|
|
res.ti.Size = len(res.buffer)
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for datetime2 column: %T %s", val, val)
|
|
return
|
|
}
|
|
case typeDateTimeOffsetN:
|
|
switch val := val.(type) {
|
|
case time.Time:
|
|
res.buffer = encodeDateTimeOffset(val, int(col.ti.Scale))
|
|
res.ti.Size = len(res.buffer)
|
|
case string:
|
|
var t time.Time
|
|
if t, err = time.Parse(sqlTimeFormat, val); err != nil {
|
|
return res, fmt.Errorf("bulk: unable to convert string to date: %v", err)
|
|
}
|
|
res.buffer = encodeDateTimeOffset(t, int(col.ti.Scale))
|
|
res.ti.Size = len(res.buffer)
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for datetimeoffset column: %T %s", val, val)
|
|
return
|
|
}
|
|
case typeDateN:
|
|
switch val := val.(type) {
|
|
case time.Time:
|
|
res.buffer = encodeDate(val)
|
|
res.ti.Size = len(res.buffer)
|
|
case string:
|
|
var t time.Time
|
|
if t, err = time.ParseInLocation(sqlDateFormat, val, time.UTC); err != nil {
|
|
return res, fmt.Errorf("bulk: unable to convert string to date: %v", err)
|
|
}
|
|
res.buffer = encodeDate(t)
|
|
res.ti.Size = len(res.buffer)
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for date column: %T %s", val, val)
|
|
return
|
|
}
|
|
case typeDateTime, typeDateTimeN, typeDateTim4:
|
|
var t time.Time
|
|
switch val := val.(type) {
|
|
case time.Time:
|
|
t = val
|
|
case string:
|
|
if t, err = time.Parse(sqlTimeFormat, val); err != nil {
|
|
return res, fmt.Errorf("bulk: unable to convert string to date: %v", err)
|
|
}
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for datetime column: %T %s", val, val)
|
|
return
|
|
}
|
|
|
|
if col.ti.Size == 4 {
|
|
res.buffer = encodeDateTim4(t)
|
|
res.ti.Size = len(res.buffer)
|
|
} else if col.ti.Size == 8 {
|
|
res.buffer = encodeDateTime(t)
|
|
res.ti.Size = len(res.buffer)
|
|
} else {
|
|
err = fmt.Errorf("mssql: invalid size of column %d", col.ti.Size)
|
|
}
|
|
|
|
// case typeMoney, typeMoney4, typeMoneyN:
|
|
case typeDecimal, typeDecimalN, typeNumeric, typeNumericN:
|
|
prec := col.ti.Prec
|
|
scale := col.ti.Scale
|
|
var dec decimal.Decimal
|
|
switch v := val.(type) {
|
|
case int:
|
|
dec = decimal.Int64ToDecimalScale(int64(v), 0)
|
|
case int8:
|
|
dec = decimal.Int64ToDecimalScale(int64(v), 0)
|
|
case int16:
|
|
dec = decimal.Int64ToDecimalScale(int64(v), 0)
|
|
case int32:
|
|
dec = decimal.Int64ToDecimalScale(int64(v), 0)
|
|
case int64:
|
|
dec = decimal.Int64ToDecimalScale(int64(v), 0)
|
|
case float32:
|
|
dec, err = decimal.Float64ToDecimalScale(float64(v), scale)
|
|
case float64:
|
|
dec, err = decimal.Float64ToDecimalScale(float64(v), scale)
|
|
case string:
|
|
dec, err = decimal.StringToDecimalScale(v, scale)
|
|
default:
|
|
return res, fmt.Errorf("unknown value for decimal: %T %#v", v, v)
|
|
}
|
|
|
|
if err != nil {
|
|
return res, err
|
|
}
|
|
dec.SetPrec(prec)
|
|
|
|
var length byte
|
|
switch {
|
|
case prec <= 9:
|
|
length = 4
|
|
case prec <= 19:
|
|
length = 8
|
|
case prec <= 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 !dec.IsPositive() {
|
|
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, typeBigBinary:
|
|
switch val := val.(type) {
|
|
case []byte:
|
|
res.ti.Size = len(val)
|
|
res.buffer = val
|
|
default:
|
|
err = fmt.Errorf("mssql: invalid type for Binary column: %T %s", val, 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: %T %s", val, 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...)
|
|
}
|
|
}
|