Daniel Becker created IMPALA-11416:
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Summary: SlotRef::tuple_is_nullable_ uninitialised for struct
children
Key: IMPALA-11416
URL: https://issues.apache.org/jira/browse/IMPALA-11416
Project: IMPALA
Issue Type: Bug
Components: Backend
Reporter: Daniel Becker
Assignee: Daniel Becker
In {{SlotRef::Init}}, {{tuple_is_nullable_}} is only assigned a value if the
{{SlotRef}} is not within a struct:
{code:cpp}
if (!slot_desc_->parent()->isTupleOfStructSlot()) {
tuple_is_nullable_ = row_desc.TupleIsNullable(tuple_idx_);
}
{code}
https://github.com/apache/impala/blob/fefb9f24be1f99ac0077a8d6ef00834d8e90ef45/be/src/exprs/slot-ref.cc#L103
Otherwise {{tuple_is_nullable_}} remains uninitialised, leading to undefined
behaviour when it is read.
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