> I will try to investigate about it.

We have all we need for positioned updates and deletes. We have to
set cursor name after each statemement execution and then use
statements "UPDATE/DELETE ... WHERE CURRENT OF <cursor_name>".
isc_dsql_execute_immediate works fine, probably normal
isc_dsql_execuse and isc_dsql_execute2 will work too.

So, we need:

isc_dsql_insert or isc_dsql_insert_m (not sure, hardly can find any
doc on that) for positioned inserts and isc_dsql_fetch_m to support
scrollable result sets.

However I do not know if these API calls are really implemented on
server side.

Best regards,
Roman Rokytskyy