Fixed error in reading negative decimals from parquet

[mdrach]

Fixes #676 . On conversion from a FixedLenByteArray to i128, any extension bytes must be filled with the value of the MSB to correctly handle negative values.

[codecov]

Codecov Report

Merging #679 (2fd7a87) into main (6ec9cf5) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 2fd7a87 differs from pull request most recent head 8c5e887. Consider uploading reports for the commit 8c5e887 to get more accurate results

@@            Coverage Diff             @@
##             main     #679      +/-   ##
==========================================
+ Coverage   69.60%   69.61%   +0.01%     
==========================================
  Files         301      301              
  Lines       16762    16768       +6     
==========================================
+ Hits        11667    11673       +6     
  Misses       5095     5095              

Impacted Files	Coverage Δ
src/io/parquet/read/mod.rs	44.23% <100.00%> (+0.81%)	⬆️
src/io/parquet/read/utils.rs	78.94% <0.00%> (ø)
src/compute/arithmetics/mod.rs	69.04% <0.00%> (ø)
src/compute/arithmetics/basic/div.rs	77.96% <0.00%> (ø)
src/compute/arithmetics/basic/mod.rs	0.00% <0.00%> (ø)
src/compute/arithmetics/basic/pow.rs	100.00% <0.00%> (ø)
src/compute/arithmetics/basic/rem.rs	84.90% <0.00%> (ø)
src/io/parquet/read/binary/basic.rs	68.32% <0.00%> (+0.60%)	⬆️

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[jorgecarleitao]

Thanks a lot, @mdrach , awesome fix. Are you working on top of crates.io? I can do a small release with this fix to 0.8.

[mdrach]

Thanks a lot, @mdrach , awesome fix. Are you working on top of crates.io? I can do a small release with this fix to 0.8.

We're using 0.7 right now. Upgrade is blocked on resolving this issue so no rush here.