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[Python] RecordBatchReader cast() errors introduced in pyarrow 16 #41884
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davlee1972
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RecordBatchReader cast() errors introduced in pyarrow 16
[Python] RecordBatchReader cast() errors introduced in pyarrow 16
May 29, 2024
jorisvandenbossche
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…g to equal schema for all types
@davlee1972 thanks for the report! It seems the cast from date32 to date32 is not explicitly included in the table of cast kernels, and therefore the Working on a fix in #42098 |
jorisvandenbossche
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…rdbatchreader-cast
jorisvandenbossche
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…qual schema for all types (#42098) ### Rationale for this change The cast from `date32` to `date32` is not included in the table of cast functions. ### What changes are included in this PR? Ensure we don't error if the types are equal in the initialization of the `CastingRecordBatchReader` ### Are these changes tested? Yes ### Are there any user-facing changes? No * GitHub Issue: #41884 Lead-authored-by: Joris Van den Bossche <[email protected]> Co-authored-by: Felipe Oliveira Carvalho <[email protected]> Signed-off-by: Joris Van den Bossche <[email protected]>
Issue resolved by pull request 42098 |
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Describe the bug, including details regarding any error messages, version, and platform.
RecordBatchReader.cast() was added in pyarrow 16..
Error: pyarrow.lib.ArrowTypeError: Field 0 cannot be cast from date32[day] to date32[day]
In my use case:
I'm trying to cast the results of a database query from:
Field 0 is a string, Field 1 is a date32[day], Field 2 is a double
to
Field 0 is a string, Field 1 is a date32[day], Field 2 is a float
But I'm getting Field 1 cast error on dates..
Component(s)
Python
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