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[Datasets] Add support for slicing Arrow blocks that contain tensor columns. #19494
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ericl
merged 2 commits into
ray-project:master
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clarkzinzow:datasets/fix/tensor-column-block-slice-copy
Oct 19, 2021
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[Datasets] Add support for slicing Arrow blocks that contain tensor columns. #19494
ericl
merged 2 commits into
ray-project:master
from
clarkzinzow:datasets/fix/tensor-column-block-slice-copy
Oct 19, 2021
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ericl
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Oct 18, 2021
ericl
approved these changes
Oct 18, 2021
…at Arrow schema is preserved.
scv119
approved these changes
Oct 19, 2021
It seems as if the failing RayDP test is unrelated? It looks like the Java gateway is failing to launch: https://buildkite.com/ray-project/ray-builders-pr/builds/16131#5696868f-e647-48a8-a9d5-61bf0379b387 |
Yep it should be unrelated: #19471 |
clarkzinzow
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Oct 20, 2021
…contain tensor columns. (ray-project#19494)" (ray-project#19517)" This reverts commit a6f9c93.
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Adds support for slicing
ArrrowBlock
s that contain tensor columns.Our current method of copying a table during block slicing breaks tensor column support, since
ChunkedArray.to_pandas()
doesn't respect our extension array, giving a Pandas Series with an opaquenp.object_
dtype, which causes later table construction to fail.This PR fixes this by doing a Pandas DataFrame roundtrip,
pyarrow.Table.from_pandas(view.to_pandas())
, to copy the table, which preserves the extension type metadata.Related Issue
Closes #19476
Checks
scripts/format.sh
to lint the changes in this PR.