testing_project/Documentation: dev_guide/internals/msgpack_extensions — English @ Weblate: tarantool> I = datetime.interval.new{year = 1, month = 200, day …

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English

tarantool> I = datetime.interval.new{year = 1, month = 200, day = -77}
---
...

tarantool> I
---
- +1 years, 200 months, -77 days
...

tarantool> M = msgpack.encode(I)
---
...

tarantool> M
---
- !!binary xwsGBAABAczIA9CzCAE=
...

tarantool> tohex = function(s) return (s:gsub('.', function(c) return string.format('%02X ', string.byte(c)) end)) end
---
...

tarantool> tohex(M)
---
- 'C7 0B 06 04 00 01 01 CC C8 03 D0 B3 08 01 '
...

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	English	Actions
	Each packed field has the following structure:
	+----------+=====================+ \| field ID \| field value \| +----------+=====================+
	The number of defined (non-null) fields can be zero. In this case, the packed interval will be encoded as integer 0.
	List of the field IDs:
	0 -- year
	1 -- month
	2 -- week
	3 -- day
	4 -- hour
	5 -- minute
	6 -- second
	7 -- nanosecond
	8 -- adjust
	Example
	Interval value ``1 years, 200 months, -77 days`` is encoded in the following way:
	tarantool> I = datetime.interval.new{year = 1, month = 200, day = -77} --- ... tarantool> I --- - +1 years, 200 months, -77 days ... tarantool> M = msgpack.encode(I) --- ... tarantool> M --- - !!binary xwsGBAABAczIA9CzCAE= ... tarantool> tohex = function(s) return (s:gsub('.', function(c) return string.format('%02X ', string.byte(c)) end)) end --- ... tarantool> tohex(M) --- - 'C7 0B 06 04 00 01 01 CC C8 03 D0 B3 08 01 ' ...
	Where:
	C7 -- MP_EXT
	0B -- size of a packed interval value (11 bytes)
	06 -- MP_INTERVAL type
	04 -- number of defined fields
	00 -- field ID (year)
	01 -- packed value ``1``
	01 -- field ID (month)
	CCC8 -- packed value ``200``
	03 -- field ID (day)
	D0B3 -- packed value ``-77``
	08 -- field ID (adjust)
	01 -- packed value ``1`` (DT_LIMIT)
	For more information about the interval type, see :ref:`interval field type details <index-box_interval>` and :doc:`description of the datetime module </reference/reference_lua/datetime>`.