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Fix issue with nullables

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This commit is contained in:
Blargian 2024-06-05 14:34:17 +02:00
parent 97ea093073
commit 655262d1a1
1 changed files with 6 additions and 4 deletions
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10
src/Formats/SchemaInferenceUtils.cpp
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@ -1547,11 +1547,13 @@ DataTypePtr makeNullableRecursively(DataTypePtr type)
DataTypes nested_types;
for (const auto & nested_type: variant_type->getVariants())
{
/// unlike tuple or array, here we do not want to make any of the variants nullable
/// so we do not call makeNullableRecursively
nested_types.push_back(nested_type);
auto is_low_cardinality = nested_type->lowCardinality();
auto has_sub_types = nested_type->haveSubtypes();
if (!is_low_cardinality && has_sub_types)
nested_types.push_back(makeNullableRecursively(nested_type));
else
nested_types.push_back(nested_type);
}
return std::make_shared<DataTypeVariant>(nested_types);
}