branch-4.1: [fix](variant) Recognize nullable array elements as NestedGroup types #66196 - #66202
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…#66196) Related PR: #63088 Problem Summary: Array elements are nullable after #63088. `get_base_type_of_array()` therefore returns `Nullable<Variant>` for the NestedGroup physical type, but `is_nested_group_type()` directly casts that wrapper to `DataTypeVariant`. The false negative bypasses the NestedGroup-specific type-conflict policy during Variant merge/compaction. This PR unwraps the nullable base type only when the input has an Array dimension. It recognizes `Array<Nullable<Variant>>` as NestedGroup while preserving the existing classifications of scalar `Variant` and `Nullable<Variant>`.
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Thank you for your contribution to Apache Doris. Please clearly describe your PR:
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run buildall |
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skip buildall |
yiguolei
approved these changes
Jul 30, 2026
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Cherry-picked from #66196