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Allow to search tuple of NULLs in a set
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@ -377,6 +377,11 @@ Field convertFieldToType(const Field & from_value, const IDataType & to_type, co
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else if (const auto * nullable_type = typeid_cast<const DataTypeNullable *>(&to_type))
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{
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const IDataType & nested_type = *nullable_type->getNestedType();
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/// NULL remains NULL after any conversion.
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if (WhichDataType(nested_type).isNothing())
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return {};
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if (from_type_hint && from_type_hint->equals(nested_type))
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return from_value;
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return convertFieldToTypeImpl(from_value, nested_type, from_type_hint);
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2
tests/queries/0_stateless/01774_tuple_null_in.reference
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tests/queries/0_stateless/01774_tuple_null_in.reference
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@ -0,0 +1,2 @@
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0
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0
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tests/queries/0_stateless/01774_tuple_null_in.sql
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tests/queries/0_stateless/01774_tuple_null_in.sql
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@ -0,0 +1,2 @@
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SELECT (NULL, NULL) = (8, 0) OR (NULL, NULL) = (3, 2) OR (NULL, NULL) = (0, 0) OR (NULL, NULL) = (3, 1);
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SELECT (NULL, NULL) IN ((NULL, 0), (3, 1), (3, 2), (8, 0));
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