GH-51127: [C++] Fix is_null nan_is_null for dictionary-encoded float arrays - #51000

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shoemoney wants to merge 5 commits into

apache:mainfrom

shoemoney:fix/arrow-isnull-dict

Commits on Sep 18, 2026

fix(arrow): handle nan_is_null for dictionary-encoded floats
shoemoney
committed
e50a11f
fix(arrow): guard dictionary NaN detection against nulls and unknown index types
shoemoney
committed
40798fd
test(arrow): add is_null nan_is_null coverage for dictionary-encoded floats
shoemoney
committed
bb4099c
fix(arrow): map is_null through the dictionary to cover null values
shoemoney
committed
1d2b266
GH-51127: [C++] Build is_null dictionary indices directly
shoemoney
committed
8811b9e