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fix: preserve array-valued casts when grouping columns - #548
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HocVoNgThai wants to merge 1 commit into
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HocVoNgThai wants to merge 1 commit into
HocVoNgThai wants to merge 1 commit into
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Track which duplicate columns have been grouped instead of identifying groups by the value's type. Append later field values without flattening arrays.
For example, casting three duplicate columns to
[1],[2]and[3]currently produces[1, 2, 3]. The change preserves the three values as[[1], [2], [3]], including empty arrays. Adds regressions for array-valued, mixed scalar/array and empty-array casts.Closes #547