fix: support melting empty DataFrames without crashing - #2509

Merged

shuoweil merged 9 commits into

mainfrom

shuowei-fix-unpivot-empty

Mar 23, 2026

Commits on Mar 20, 2026

fix: handle empty selections inside unpivot and melt layout arrays
shuoweil
committed
f8241d7
chore: address PR review comments
shuoweil
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d956453
test: add test_count_empty_multiindex_columns
shuoweil
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b6dcfec
test: move test_dataframe_melt_multiindex per PR feedback
shuoweil
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27ed0f2
fix: flatten untyped recursive NULL casts in bq compiler
shuoweil
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00dbe35
fix: apply typed NULL to unpivot for empty columns
shuoweil
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7682f7d
test: add test case for empty multiindex unpivot bypassing struct compiler bugs
shuoweil
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156603c
Merge branch 'main' into shuowei-fix-unpivot-empty
shuoweil
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24818f1
revert: flatten untyped recursive NULL casts in bq compiler
shuoweil
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31b285e