return
			}
		case "IfNoneMatch":
			z.IfNoneMatch, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "IfNoneMatch")
				return
			}
		case "IfModifiedSince":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "IfModifiedSince")
					return
				}
				z.IfModifiedSince = nil
			} else {
				if z.IfModifiedSince == nil {

			}
			if cap(z.PoolStats) >= int(zb0002) {
				z.PoolStats = (z.PoolStats)[:zb0002]
			} else {
				z.PoolStats = make([]*rebalanceStats, zb0002)
			}
			for za0001 := range z.PoolStats {
				if dc.IsNil() {
					err = dc.ReadNil()
					if err != nil {
						err = msgp.WrapError(err, "PoolStats", za0001)
						return
					}
					z.PoolStats[za0001] = nil
				} else {
					if z.PoolStats[za0001] == nil {

				zb0002--
				var za0001 string
				var za0002 *SRStatus
				za0001, err = dc.ReadString()
				if err != nil {
					err = msgp.WrapError(err, "M")
					return
				}
				if dc.IsNil() {
					err = dc.ReadNil()
					if err != nil {
						err = msgp.WrapError(err, "M", za0001)
						return
					}
					za0002 = nil
				} else {
					if za0002 == nil {

					// same nested structure
					if _, ok := joinedNestedSchemaMap[fullRelsName]; !ok {
						if value := reflect.ValueOf(values[idx]).Elem(); value.Kind() == reflect.Ptr && value.IsNil() {
							isNilPtrValue = true
							break
						}

						relValue.Set(reflect.New(relValue.Type().Elem()))
						joinedNestedSchemaMap[fullRelsName] = nil
					}
				}
				currentReflectValue = relValue

				z.ObjVersions[za0002], err = dc.ReadUint64()
				if err != nil {
					err = msgp.WrapError(err, "ObjVersions", za0002)
					return
				}
			}
		case "rs":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "ReplicationStats")
					return
				}
				z.ReplicationStats = nil
			} else {
				if z.ReplicationStats == nil {

			}
		}
	}

	// assign stmt.ReflectValue
	if stmt.Dest != nil {
		stmt.ReflectValue = reflect.ValueOf(stmt.Dest)
		for stmt.ReflectValue.Kind() == reflect.Ptr {
			if stmt.ReflectValue.IsNil() && stmt.ReflectValue.CanAddr() {
				stmt.ReflectValue.Set(reflect.New(stmt.ReflectValue.Type().Elem()))
			}

			stmt.ReflectValue = stmt.ReflectValue.Elem()
		}
		if !stmt.ReflectValue.IsValid() {

	}

	return value == nil || eqNilReflect(value)
}

func eqNilReflect(value interface{}) bool {
	reflectValue := reflect.ValueOf(value)
	return reflectValue.Kind() == reflect.Ptr && reflectValue.IsNil()

		switch msgp.UnsafeString(field) {
		case "OlderThan":
			z.OlderThan, err = dc.ReadDuration()
			if err != nil {
				err = msgp.WrapError(err, "OlderThan")
				return
			}
		case "CreatedBefore":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "CreatedBefore")
					return
				}
				z.CreatedBefore = nil
			} else {
				if z.CreatedBefore == nil {

			return
		}
		switch msgp.UnsafeString(field) {
		case "nf":
			z.NotFound, err = dc.ReadBool()
			if err != nil {
				err = msgp.WrapError(err, "NotFound")
				return
			}
		case "e":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "Err")
					return
				}
				z.Err = nil
			} else {
				if z.Err == nil {
					z.Err = new(string)
				}

		db.AddError(committer.Commit())
	} else {
		db.AddError(ErrInvalidTransaction)
	}
	return db
}

// Rollback rollbacks the changes in a transaction
func (db *DB) Rollback() *DB {
	if committer, ok := db.Statement.ConnPool.(TxCommitter); ok && committer != nil {
		if !reflect.ValueOf(committer).IsNil() {
			db.AddError(committer.Rollback())
		}