[SPARK-46776][PYTHON] Support pa.ChunkedArray columns in createDataFrame from pandas#56157
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[SPARK-46776][PYTHON] Support pa.ChunkedArray columns in createDataFrame from pandas#56157Yicong-Huang wants to merge 1 commit into
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…ame from pandas ### What changes were proposed in this pull request? `pa.Array.from_pandas` may return a `pa.ChunkedArray` (e.g. for `string[pyarrow]` dtype, or string data over 2 GB), which `pa.RecordBatch.from_arrays` rejects. Route the conversion through `pa.Table.from_arrays(...).to_batches()` instead, which accepts both `Array` and `ChunkedArray` and emits zero-copy `RecordBatch`es aligned on a common chunk boundary. ### Why are the changes needed? Fix `createDataFrame` from pandas raising `TypeError: Cannot convert pyarrow.lib.ChunkedArray to pyarrow.lib.Array`. See [SPARK-46776](https://issues.apache.org/jira/browse/SPARK-46776). ### Does this PR introduce _any_ user-facing change? Yes. `createDataFrame(pandas_df)` no longer raises when a column is backed by a multi-chunk pyarrow array. ### How was this patch tested? New test `ArrowTestsMixin.test_createDataFrame_pandas_chunked_array_backed`, exercised on both classic and Spark Connect paths via the parity suite. ### Was this patch authored or co-authored using generative AI tooling? No Closes #56157 from Yicong-Huang/SPARK-46776. Authored-by: Yicong Huang <17627829+Yicong-Huang@users.noreply.github.com> Signed-off-by: Yicong-Huang <17627829+Yicong-Huang@users.noreply.github.com> (cherry picked from commit 2f4ed64) Signed-off-by: Yicong-Huang <17627829+Yicong-Huang@users.noreply.github.com>
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Merged to master and branch-4.x. |
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late lgtm |
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What changes were proposed in this pull request?
pa.Array.from_pandasmay return apa.ChunkedArray(e.g. forstring[pyarrow]dtype, or string data over 2 GB), whichpa.RecordBatch.from_arraysrejects. Route the conversion throughpa.Table.from_arrays(...).to_batches()instead, which accepts bothArrayandChunkedArrayand emits zero-copyRecordBatches aligned on a common chunk boundary.Why are the changes needed?
Fix
createDataFramefrom pandas raisingTypeError: Cannot convert pyarrow.lib.ChunkedArray to pyarrow.lib.Array. See SPARK-46776.Does this PR introduce any user-facing change?
Yes.
createDataFrame(pandas_df)no longer raises when a column is backed by a multi-chunk pyarrow array.How was this patch tested?
New test
ArrowTestsMixin.test_createDataFrame_pandas_chunked_array_backed, exercised on both classic and Spark Connect paths via the parity suite.Was this patch authored or co-authored using generative AI tooling?
No