fix: fixedsizelist in delta #2607
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tychoish
requested changes
Feb 7, 2024
tychoish
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Feb 7, 2024
This was referenced Feb 11, 2024
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fixes the issue of delta converting fsl -> list when writing delta tables.
This PR adds some metadata containing the original field if it was downcast when writing to delta, then compares those fields. If they are different, it applies a projection from the delta field to the original field.
If we need further performance, we'll likely have to read and write directly instead of using delta's arrow/datafusion logic as they have no intention on supporting FixedSizeList.