Rewrite conversion in terms of column #15213
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This was referenced Mar 2, 2024
vyasr
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PointKernel
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Mar 7, 2024
davidwendt
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bdice
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Description
It looks like soon after I started investigating scalar conversions for #14121 (but well before I made the PR) a major underlying hole was plugged in pyarrow via apache/arrow#36162. Most of #14121 was created to give us a way to handle scalars from pyarrow generically in libcudf. Now that pyarrow scalars can be easily tossed into arrays, we no longer really need separate scalar functions in libcudf; we can simply create an array from the scalar, put it into a table, and then call the table function.
Additionally, arrow also has a function for creating an array from a scalar. This function is not new but was previously undocumented. The builder code added to libcudf in #14121 can be removed and replaced with that factory. The scalar conversion is as simple as calling that arrow function and then using our preexisting
from_arrowfunction on the resulting array.For now this PR is just a simplification of internals. Future PRs will remove the scalar API once we have a more standard path for the conversion of arrays via the C Data Interface.
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