s2Type     CompressionType = "S2"
	snappyType CompressionType = "SNAPPY"
)

const (
	maxRecordSize = 1 << 20 // 1 MiB
)

var parquetSupport bool

func init() {
	parquetSupport = env.Get("MINIO_API_SELECT_PARQUET", config.EnableOff) == config.EnableOn
}

var bufPool = sync.Pool{
	New: func() interface{} {
		// make a buffer with a reasonable capacity.
		return bytes.NewBuffer(make([]byte, 0, maxRecordSize))
	},
}

package clause

// Select select attrs when querying, updating, creating
type Select struct {
	Distinct   bool
	Columns    []Column
	Expression Expression
}

func (s Select) Name() string {
	return "SELECT"
}

func (s Select) Build(builder Builder) {
	if len(s.Columns) > 0 {
		if s.Distinct {
			builder.WriteString("DISTINCT ")
		}

		for idx, column := range s.Columns {
			if idx > 0 {
				builder.WriteByte(',')

	}{
		{
			[]clause.Interface{clause.Select{}, clause.From{}},
			"SELECT * FROM `users`", nil,
		},
		{
			[]clause.Interface{clause.Select{
				Columns: []clause.Column{clause.PrimaryColumn},
			}, clause.From{}},
			"SELECT `users`.`id` FROM `users`", nil,
		},
		{
			[]clause.Interface{clause.Select{
				Columns: []clause.Column{clause.PrimaryColumn},
			}, clause.Select{
				Columns: []clause.Column{{Name: "name"}},

mango`,
		},
		{
			name:  "Select column simplest",
			query: `select qty from S3Object`,
			wantResult: `1
3`,
		},
		{
			name:  "Select column with table name prefix",
			query: `select S3Object.qty from S3Object`,
			wantResult: `1
3`,
		},
		{
			name:  "Select column without table alias",
			query: `select qty from S3Object s`,
			wantResult: `1
3`,
		},

func BenchmarkSelectAll_10M(b *testing.B) {
	benchmarkSelectAll(b, 10*humanize.MiByte)
}

func benchmarkSingleCol(b *testing.B, count int) {
	benchmarkSelect(b, count, "select id from S3Object")
}

// BenchmarkSingleRow_100K - benchmark SELECT column function with 100k records.
func BenchmarkSingleCol_100K(b *testing.B) {
	benchmarkSingleCol(b, 1e5)
}

// BenchmarkSelectAll_1M - benchmark * function with 1m records.

//
// Use Select when you only want a subset of the fields. By default, GORM will select all fields.
// Select accepts both string arguments and arrays.
//
//	// Select name and age of user using multiple arguments
//	db.Select("name", "age").Find(&users)
//	// Select name and age of user using an array
//	db.Select([]string{"name", "age"}).Find(&users)

		clauses := []clause.Interface{clause.Select{}, clause.From{}, clause.Where{Exprs: []clause.Expression{clause.Eq{Column: clause.PrimaryColumn, Value: "1"}, clause.Gt{Column: "age", Value: 18}, clause.Or(clause.Neq{Column: "name", Value: "jinzhu"})}}}

		for _, clause := range clauses {
			stmt.AddClause(clause)
		}

		stmt.Build("SELECT", "FROM", "WHERE")
		_ = stmt.SQL.String()
	}
}

	}

	var maxId int64
	userTable := func(db *gorm.DB) *gorm.DB {
		return db.WithContext(context.Background()).Table("users")
	}
	if err := DB.Scopes(userTable).Select("max(id)").Scan(&maxId).Error; err != nil {
		t.Errorf("select max(id)")
	}
}

func TestComplexScopes(t *testing.T) {
	tests := []struct {
		name     string
		queryFn  func(tx *gorm.DB) *gorm.DB
		expected string
	}{
		{

	}
	st.Results(func(b *grid.Bytes) error {
		select {
		case listenCh <- *b:
		default:
			// Do not block on slow receivers.
			b.Recycle()
		}
		return nil
	})
}

// Listen - listen on peers.
func (client *peerRESTClient) Listen(ctx context.Context, listenCh chan<- []byte, v url.Values) {
	go func() {
		for {
			client.doListen(ctx, listenCh, v)
			select {
			case <-ctx.Done():
				return

			"SELECT * FROM `users` LIMIT ?",
			[]interface{}{limit0},
		},
		{
			[]clause.Interface{clause.Select{}, clause.From{}, clause.Limit{Offset: 20}},
			"SELECT * FROM `users` OFFSET ?",
			[]interface{}{20},
		},
		{
			[]clause.Interface{clause.Select{}, clause.From{}, clause.Limit{Offset: 20}, clause.Limit{Offset: 30}},
			"SELECT * FROM `users` OFFSET ?",