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1.5.0

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@TomHodson TomHodson released this 07 Feb 11:18
· 16 commits to master since this release
1.5.0
513f284

1.5.0

  • Add a new LongConstantString codec which permits encoding constant columns where the constant is a string > 8 characters in length.

    • This saves 1 byte per row compared the previous way these columns were encoded.
    • A C++ implementation has been added to ODC at the same time, version 1.6.0
    • Bumped required ODC version to 1.6.0 for feature parity.
    • Decoding data using this codec will work straight away.
    • Encoding data with the new codec is disabled by default and can be enabled with the environment variable "ODC_ENABLE_WRITING_LONG_STRING_CODEC=1".
    • At some point in a future release, encoding will be enabled by default.

  • Accept various new datatypes and tighten datatype selection logic (fixes [ODB-559]):

    • Unsigned Integers: uint8 - uint32 (note uint64 is not supported).
    • Signed Integers: int8 - int64.
    • Float32 in addition to float64.
    • Fixed the selection logic for ShortReal2 and ShortReal codecs so the smallest positive normal float32 number struct.unpack("<f", b"\x00\x00\x80\x00")[0] can now be used in data.

  • Converted to a pyproject.toml based package.

  • Fix various warnings:

    • Pandas Deprecation warning about df.dtypes[0] needing to become df.dtypes.iloc[0].
    • Pandas Deprecation warning about converting implicitly converting dataframe column dtype.
    • Pandas Future Warning about concatenation with empty or all-NA dataframes.
    • "pkg_resources is deprecated as an API."
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