msgpack: support decimals with negative scale #298
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Current decimal external type parser do not expect negative scale in
decimal payload. Negative scale is a positive exponent. It seems that
the only way to obtain positive exponent is to use E-notation since
Tarantool library do not truncate trailing zeroes before decimal point:
```
tarantool> msgpack.encode(decimal.new('1e33')):hex()
---
- c70301d0df1c
...
tarantool> msgpack.encode(decimal.new('1000000000000000000000000000000000')):hex()
---
- c713010001000000000000000000000000000000000c
...
```
There are two different bugs in current implementation:
- we support only `positive fixint` scale and do not expect `int 8` [2],
- we do not expect negative scale so positive exponent will be ignored.
This patch fixes both of them. See also [3].
1. https://github.com/tarantool/tarantool/blob/ba749e820bf0638aa3f79f266848590f9713c1cf/src/lib/core/decimal.c#L432-L450
2. https://github.com/msgpack/msgpack/blob/master/spec.md
3. tarantool/go-tarantool#314
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msgpack-python package was deprecated in 2018 in favor of msgpack package. After previous patch in the patchset, we require `Unpacker` `tell` handle and msgpack-python 0.4.0 do not yet have it. It seems to be no reason to support the package which is not supported for the five years already, so we better drop it.
oleg-jukovec
approved these changes
Jun 30, 2023
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Overview
This release inroduces API to request server protocol version and
feature, as well as introduce decimal bugfix.
Breaking changes
- Drop `msgpack-python` support. (Package not supported since 2019.)
Use `msgpack` instead.
Added
- Allow to require specific server protocol version
and features (#267).
Fixed
- Parsing of E-notation Tarantool decimals with positive
exponent (PR #298).
Merged
DifferentialOrange
added a commit
that referenced
this pull request
Jun 30, 2023
Overview
This release introduces API to request server protocol version and
feature, as well as introduce decimal bugfix.
Breaking changes
- Drop `msgpack-python` support. (Package not supported since 2019.)
Use `msgpack` instead.
Added
- Allow to require specific server protocol version
and features (#267).
Fixed
- Parsing of E-notation Tarantool decimals with positive
exponent (PR #298).
DifferentialOrange
added a commit
that referenced
this pull request
Jun 30, 2023
Overview
This release introduces API to request server protocol version and
feature, as well as introduce decimal bugfix.
Breaking changes
- Drop `msgpack-python` support. (Package not supported since 2019.)
Use `msgpack` instead.
Added
- Allow to require specific server protocol version
and features (#267).
Fixed
- Parsing of E-notation Tarantool decimals with positive
exponent (PR #298).
DifferentialOrange
added a commit
that referenced
this pull request
Jun 30, 2023
Overview
This release introduces API to request server protocol version and
feature, as well as introduce decimal bugfix.
Breaking changes
- Drop `msgpack-python` support. (Package not supported since 2019.)
Use `msgpack` instead.
Added
- Allow to require specific server protocol version
and features (#267).
Fixed
- Parsing of E-notation Tarantool decimals with positive
exponent (PR #298).
DifferentialOrange
added a commit
that referenced
this pull request
Jun 30, 2023
Overview
This release introduces API to request server protocol version and
feature, as well as introduce decimal bugfix.
Breaking changes
- Drop `msgpack-python` support. (Package not supported since 2019.)
Use `msgpack` instead.
Added
- Allow to require specific server protocol version
and features (#267).
Fixed
- Parsing of E-notation Tarantool decimals with positive
exponent (PR #298).
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Current decimal external type parser do not expect negative scale in decimal payload. Negative scale is a positive exponent. It seems that the only way to obtain positive exponent is to use E-notation since Tarantool library do not truncate trailing zeroes before decimal point:
There are two different bugs in current implementation:
positive fixintscale and do not expectint 8[2],This patch fixes both of them. See also [3].