func parseChunkSignature(chunk []byte) []byte {
	chunkSplits := bytes.SplitN(chunk, []byte(s3ChunkSignatureStr), 2)
	return chunkSplits[1]
}

// parse hex to uint64.
func parseHexUint(v []byte) (n uint64, err error) {
	for i, b := range v {
		switch {
		case '0' <= b && b <= '9':
			b -= '0'
		case 'a' <= b && b <= 'f':
			b = b - 'a' + 10
		case 'A' <= b && b <= 'F':

	}

	if name != "groupby1" || total != 660 {
		t.Errorf("name should be groupby, but got %v, total should be 660, but got %v", name, total)
	}

	result := struct {
		Name  string
		Total int64
	}{}

	if err := DB.Model(&User{}).Select("name, sum(age) as total").Where("name LIKE ?", "groupby%").Group("name").Having("name = ?", "groupby1").Find(&result).Error; err != nil {

		b.Fatal(err)
	}
	for _, file := range files {
		b.Run(file.Name(), func(b *testing.B) {
			f, err := os.ReadFile(filepath.Join("testdata", file.Name()))
			if err != nil {
				b.Fatal(err)
			}
			b.SetBytes(int64(len(f)))
			b.ReportAllocs()
			b.ResetTimer()
			var record sql.Record
			for b.Loop() {
				r := NewPReader(io.NopCloser(bytes.NewBuffer(f)), &ReaderArgs{})
				for {
					record, err = r.Read(record)

		b.Fatal(err)
	}
	for _, file := range files {
		b.Run(file.Name(), func(b *testing.B) {
			f, err := os.ReadFile(filepath.Join("testdata", file.Name()))
			if err != nil {
				b.Fatal(err)
			}
			b.SetBytes(int64(len(f)))
			b.ReportAllocs()
			b.ResetTimer()
			var record sql.Record
			for b.Loop() {
				r := NewReader(io.NopCloser(bytes.NewBuffer(f)), &ReaderArgs{})
				for {
					record, err = r.Read(record)

	gz, err := gzip.NewReader(bufio.NewReader(f))
	if err != nil {
		t.Fatal(err)
	}

	buf, err := io.ReadAll(gz)
	if err != nil {
		t.Fatal(err)
	}

	_, err = readXLMetaNoData(bytes.NewReader(buf), int64(len(buf)))
	if err == nil {
		t.Fatal("expected error but returned success")
	}
}

func TestXLV2FormatData(t *testing.T) {
	failOnErr := func(err error) {
		t.Helper()
		if err != nil {
			t.Fatal(err)

			md5Bytes := md5.Sum([]byte(object.content))
			oi, err := obj.PutObject(context.Background(), testCase.bucketName, object.name, mustGetPutObjReader(t, strings.NewReader(object.content),
				int64(len(object.content)), hex.EncodeToString(md5Bytes[:]), ""), ObjectOptions{})
			if err != nil {
				t.Log(oi)
				t.Fatalf("%s : %s", instanceType, err.Error())
			}
		}

xlHeaderVersion version == 1:

```
//msgp:tuple xlMetaV2VersionHeader
type xlMetaV2VersionHeader struct {
 VersionID [16]byte  // Version UUID, raw.
 ModTime   int64     // Unix nanoseconds.
 Signature [4]byte   // Signature of metadata.
 Type      uint8     // Type if the version
 Flags     uint8
}
```

The following flags are defined:

```
const (

)

// label constants
const (
	driveL      = "drive"
	poolIndexL  = "pool_index"
	setIndexL   = "set_index"
	driveIndexL = "drive_index"

	apiL = "api"

	sectorSize = uint64(512)
	kib        = float64(1 << 10)

	driveHealthOffline = float64(0)
	driveHealthOnline  = float64(1)
	driveHealthHealing = float64(2)
)

var allDriveLabels = []string{driveL, poolIndexL, setIndexL, driveIndexL}

			continue
		}

		var dm madmin.DiskMetric
		dm.NDisks = 1
		if d.Healing {
			dm.Healing++
		}
		if d.Metrics != nil {
			dm.LifeTimeOps = make(map[string]uint64, len(d.Metrics.APICalls))
			for k, v := range d.Metrics.APICalls {
				if v != 0 {
					dm.LifeTimeOps[k] = v
				}
			}
			dm.LastMinute.Operations = make(map[string]madmin.TimedAction, len(d.Metrics.APICalls))

	"errors"
	"fmt"
	"reflect"
	"sort"
	"strings"

	"gorm.io/gorm/clause"
	"gorm.io/gorm/logger"
	"gorm.io/gorm/schema"
)

type result struct {
	Result       sql.Result
	RowsAffected int64
	Error        error
}

func (info *result) ModifyStatement(stmt *Statement) {
	info.Result = nil
	info.RowsAffected = 0
	info.Error = nil
	stmt.Result = info
}