}

			for initialized || rows.Next() {
			BEGIN:
				initialized = false

				if update {
					if int(db.RowsAffected) >= reflectValue.Len() {
						return
					}
					elem = reflectValue.Index(int(db.RowsAffected))
					if onConflictDonothing {
						for _, field := range fields {
							if _, ok := field.ValueOf(db.Statement.Context, elem); !ok {
								db.RowsAffected++
								goto BEGIN
							}

					distinctElems := reflect.MakeSlice(reflect.SliceOf(fieldType), 0, 10)
					identityMap := map[string]bool{}
					for i := 0; i < rValLen; i++ {
						obj := db.Statement.ReflectValue.Index(i)
						if reflect.Indirect(obj).Kind() != reflect.Struct {
							break
						}
						if _, zero := rel.Field.ValueOf(db.Statement.Context, obj); !zero { // check belongs to relation value

		}
		results = append(results, clause.Expr{SQL: str})
	}
	return
}

// BuildIndexOptionsInterface build index options interface
type BuildIndexOptionsInterface interface {
	BuildIndexOptions([]schema.IndexOption, *gorm.Statement) []interface{}
}

// CreateIndex create index `name`
func (m Migrator) CreateIndex(value interface{}, name string) error {
	return m.RunWithValue(value, func(stmt *gorm.Statement) error {

// [docs] for more depth.
//
//	// add a simple limit clause
//	db.Clauses(clause.Limit{Limit: 1}).Find(&User{})
//	// tell the optimizer to use the `idx_user_name` index
//	db.Clauses(hints.UseIndex("idx_user_name")).Find(&User{})
//	// specify the lock strength to UPDATE
//	db.Clauses(clause.Locking{Strength: "UPDATE"}).Find(&users)
//
// [docs]: https://gorm.io/docs/sql_builder.html#Clauses

			switch db.Statement.ReflectValue.Kind() {
			case reflect.Slice, reflect.Array:
				if config.LastInsertIDReversed {
					for i := db.Statement.ReflectValue.Len() - 1; i >= 0; i-- {
						rv := db.Statement.ReflectValue.Index(i)
						if reflect.Indirect(rv).Kind() != reflect.Struct {
							break
						}

						_, isZero := pkField.ValueOf(db.Statement.Context, rv)
						if isZero {

			ID uint
		}
		Level3 struct {
			ID       uint
			Level4ID sql.NullInt64 `sql:"index"`
			Level4   *Level4
		}
		Level2 struct {
			ID      uint
			Level3s []*Level3 `gorm:"many2many:level2_level3s"`
		}
		Level1 struct {
			ID       uint
			Level2ID sql.NullInt64 `sql:"index"`
			Level2   *Level2
		}
	)

			tx.AddError(ErrPrimaryKeyRequired)
			break
		}

		primaryValue, zero := result.Statement.Schema.PrioritizedPrimaryField.ValueOf(tx.Statement.Context, resultsValue.Index(resultsValue.Len()-1))
		if zero {
			tx.AddError(ErrPrimaryKeyRequired)
			break
		}
		queryDB = tx.Clauses(clause.Gt{Column: clause.Column{Table: clause.CurrentTable, Name: clause.PrimaryKey}, Value: primaryValue})

						reflectValue.SetLen(rv.Len())
						for i := 0; i < rv.Len(); i++ {
							frv := rel.Field.ReflectValueOf(db.Statement.Context, rv.Index(i))
							if frv.Kind() != reflect.Ptr {
								reflectValue.Index(i).Set(frv.Addr())
							} else {
								reflectValue.Index(i).Set(frv)
							}
						}

						tx := preloadDB(db, reflectValue, reflectValue.Interface())

				if len(fromCallbacks) > 0 {
					for i := 0; i < stmt.ReflectValue.Len(); i++ {
						stmt.AddError(field.Set(stmt.Context, stmt.ReflectValue.Index(i), value))
					}
				} else {
					stmt.AddError(field.Set(stmt.Context, stmt.ReflectValue.Index(stmt.CurDestIndex), value))
				}
			case reflect.Struct:
				if !stmt.ReflectValue.CanAddr() {
					stmt.AddError(ErrInvalidValue)
					return
				}

		{Name: "UpdatedAt", DBName: "updated_at", BindNames: []string{"Model", "UpdatedAt"}, DataType: schema.Time},
		{Name: "DeletedAt", DBName: "deleted_at", BindNames: []string{"Model", "DeletedAt"}, Tag: `gorm:"index"`, DataType: schema.Time},
		{Name: "Name", DBName: "name", BindNames: []string{"Name"}, DataType: schema.String},
		{Name: "Age", DBName: "age", BindNames: []string{"Age"}, DataType: schema.Uint, Size: 64},