Alter source schema by refreshing schema registry

[Rossil2012]

Track #14057.

[xiangjinwu]

Has this been supported? Could you link the PR?

[Rossil2012]

This issue is created by a misclick in #11800.
The work is on going (see #14057).
Let's reopen it as a tracking issue anyway.

[neverchanje]

I wonder what is the ultimate syntax for this feature? The protobuf message name can be unchanged when updating the schema in the most common case.

@st1page

[st1page]

I wonder what is the ultimate syntax for this feature? The protobuf message name can be unchanged when updating the schema in the most common case.

@st1page

ALTER SOURCE xx FORMAT xx ENCODE xx (...)
e.g.

   ALTER SOURCE xx FORMAT xx ENCODE xx (...) FORMAT plain ENCODE protobuf(
        schema.registry = 'http://message_queue:8081',
        message = 'test.User'
    );

The encode options will overwrite the old one and re-registry the schema
Altering data_format and data_encode is not supported, in other words, they should be the same the current.

[Rossil2012]

Closed as #14057 is merged. alter table with conn is tracked in #11800.