err = r.mr.Skip()
		if err != nil {
			if err == io.EOF {
				err = io.ErrUnexpectedEOF
			}
			r.err = err
			return err
		}
	}
}

// readN will return all the requested number of entries in order
// or all if n < 0.
// Will return io.EOF if end of stream is reached.
// If requesting 0 objects nil error will always be returned regardless of at end of stream.

    url: AnyUrl


# Ref JSON Schema 2020-12: https://json-schema.org/draft/2020-12/json-schema-validation#name-type
SchemaType = Literal[
    "array", "boolean", "integer", "null", "number", "object", "string"
]


class Schema(BaseModelWithConfig):
    # Ref: JSON Schema 2020-12: https://json-schema.org/draft/2020-12/json-schema-core.html#name-the-json-schema-core-vocabu
    # Core Vocabulary

			return n, BadDigest{
				ExpectedMD5:   v.Expected.String(),
				CalculatedMD5: v.Computed.String(),
			}
		}
	}
	return n, err
}

// Size returns the absolute number of bytes the Reader
// will return during reading. It returns -1 for unlimited
// data.
func (r *Reader) Size() int64 { return r.size }

// ActualSize returns the pre-modified size of the object.

		e.aggregate.runningCount++

	case aggFnAvg, aggFnSum:
		e.aggregate.runningCount++
		// Convert to float.
		f, ok := argVal.ToFloat()
		if !ok {
			return fmt.Errorf("Could not convert value %v (%s) to a number", argVal.value, argVal.GetTypeString())
		}
		argVal.setFloat(f)
		err = e.aggregate.runningSum.arithOp(opPlus, argVal)

	case aggFnMin:
		err = e.aggregate.runningMin.minmax(argVal, false, isFirstRow)

///

Например, эта кастомная проверка убеждается, что ID элемента начинается с `isbn-` для номера книги <abbr title="ISBN означает International Standard Book Number – Международный стандартный книжный номер">ISBN</abbr> или с `imdb-` для ID URL фильма на <abbr title="IMDB (Internet Movie Database) — веб‑сайт с информацией о фильмах">IMDB</abbr>:

// input. The arguments are an initial substring of the remaining unprocessed
// data and a flag, atEOF, that reports whether the [Reader] has no more data
// to give. The return values are the number of bytes to advance the input
// and the next token to return to the user, if any, plus an error, if any.
//
// Scanning stops if the function returns an error, in which case some of

	MountPath  string
	ID         string
	Rotational bool
	Metrics    DiskMetrics
	Error      string // carries the error over the network
}

// DiskMetrics has the information about XL Storage APIs
// the number of calls of each API and the moving average of
// the duration of each API.
type DiskMetrics struct {
	LastMinute              map[string]AccElem `json:"apiLatencies,omitempty"`

		}
		if err != nil {
			return nil, err
		}
	}

	// Update count of records output.
	e.outputCount++

	return output, nil
}

// LimitReached - returns true if the number of records output has
// reached the value of the `LIMIT` clause.
func (e *SelectStatement) LimitReached() bool {
	if e.limitValue == -1 {
		return false
	}
	return e.outputCount >= e.limitValue

//     endpoint: "https://notify.endpoint" # notification endpoint to receive job status events
//     token: "Bearer xxxxx" # optional authentication token for the notification endpoint

//   retry:
//     attempts: 10 # number of retries for the job before giving up
//     delay: "500ms" # least amount of delay between each retry

//go:generate msgp -file $GOFILE -unexported

// BatchKeyRotationType defines key rotation type

		t.Fatalf("failed to get column types, got error: %v", err)
	}
	typ := reflect.Indirect(reflect.ValueOf(&UserMigrateColumn2{})).Type()
	numField := typ.NumField()
	if numField != len(columnTypes) {
		t.Fatalf("column's number not match struct and ddl, %d != %d", numField, len(columnTypes))
	}
	namer := schema.NamingStrategy{}
	for i := 0; i < numField; i++ {
		expectName := namer.ColumnName("", typ.Field(i).Name)