From jarym:

1. Create a database table with a column of a complex type, e.g:

create type object_version as
(
	major integer,
	minor integer,
	patch integer
)
;

create table test_complex_type
(
        complex_col object_version
)

2. Start Debezium (in my case I used the embedded engine but I doubt it will be any different if I use Kafka Connect)

Then I get the following warning:

> Unexpected JDBC type '2002' for column 'version'