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Deprecate sliced_string_cast in favor of library utils #254

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rkenmi opened this issue Dec 1, 2023 · 0 comments
Open

Deprecate sliced_string_cast in favor of library utils #254

rkenmi opened this issue Dec 1, 2023 · 0 comments

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@rkenmi
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rkenmi commented Dec 1, 2023

def sliced_string_cast(array: pa.ChunkedArray) -> pa.ChunkedArray:
"""performs slicing of a pyarrow array prior casting to a string.
This prevents a pyarrow from allocating too large of an array causing a failure.
Issue: apache/arrow#38835
TODO: deprecate this function when pyarrow performs proper ChunkedArray -> ChunkedArray casting
"""

  1. Should we use pyarrow.large_string() to cast large columns > 2GB?
  2. Contribute to pyarrow or wait for a more general solution to re-use here?
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