Parse error when using vector_serialize with returning clause

[PhilippSalvisberg]

The following example work without parse errors

select vector_serialize(vector('[1.1,2.2,3.3]', 3, float32));

However, when using the returning clause in vector_serialize a syntax error is thrown by db* CODEOP:

select vector_serialize(vector('[1.1,2.2,3.3]', 3, float32) returning varchar2(200 char));
select vector_serialize(vector('[1.1,2.2,3.3]', 3, float32) returning clob);