Hmm, it's system-wide, and now I see, that it's the wrong way. I can't use this. Are there any possibilities to have such option just for a process?

InterSystems DB-API Driver does not support it, yet, But yeah, this can solve it, and I like this way more.

sqlalchemy.exc.InterfaceError: (iris.dbapi._DBAPI.InterfaceError) Error parsing statement 'SET OPTION PKEY_IS_IDKEY = TRUE':

Yeah, sure, -v will show the actual output from pip

I've already patched DB-API as a workaround, and see that a fix in IRIS makes not so much sense since the issue still is in older versions. So, I would fix it on the driver's side.

And how it can help me, when I do SQL request through DB-API

SELECT id FROM table, gives me one type, and SELECT id FROM table ORDER BY id gives another type

In both cases, I expect the same time, both types I've asked for id, but the result is very different.

Yeah, it would be kind of ok, if I would have the option to write SQL Query. But in my case, it's not an option kind of.

For instance, using ORM in Python, the table above is defined this way

        Table(
            "some_table",
            metadata,
            Column("id", Integer, primary_key=True),
            Column("x", Integer),
            Column("y", Integer),
            Column("z", String(50)),
        )

Insert some data, into this table

        connection.execute(
            cls.tables.some_table.insert(),
            [
                {"id": 1, "x": 1, "y": 2, "z": "z1"},
                {"id": 2, "x": 2, "y": 3, "z": "z2"},
                {"id": 3, "x": 3, "y": 4, "z": "z3"},
                {"id": 4, "x": 4, "y": 5, "z": "z4"},
            ],
        )

And now, select that data. This code is a part of a test, but I hope the idea is quite clear. Where stmt will be compiled to SELECT id from some_table ORDER BY id

        table = self.tables.some_table
        stmt = (
            select(table.c.id)
            .order_by(table.c.id)
        )
        self._assert_result(
            stmt,
            [(1, ), (2,), (3,), (4,)],
        )

This particular test will fail. It gets [('1', ), ('2',), ('3',), ('4',)] while expects [(1, ), (2,), (3,), (4,)]

Right, only resources marked as Deployed=true will appear without source code in the final package

Only if defined as classes in module.xml. But, probably can be improved to support any way. 

I did some tests with Embedded Python as well, and it keeps working even without source code.

At least for the developer. Yes, the final package has no source code at all, it only delivers compiled code, so, that's why it requires the exact version of platform to build on and install