feat: Implement decimal <-> float16 casts#10008
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neilconway wants to merge 1 commit into
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Jefffrey
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May 23, 2026
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Which issue does this PR close?
Rationale for this change
Arrow supports casts between decimal and float64/float32; for consistency and completeness, we should also support casts between decimal and float16.
In DataFusion, this will be particularly useful: once apache/datafusion#14612 is fixed,
arrow_cast(0.0, 'Float16')will no longer work, unless we first add support for decimal -> float16 casts in arrow-rs.What changes are included in this PR?
Are these changes tested?
Yes; new tests added.
Are there any user-facing changes?
Yes; new casts are now supported. Otherwise no changes.