Hi Tomas,
Since you are using xql files you can just ommit the body part and just go db_exec_plsql doc_insert "" on your tcl file. The precedense of the Query dispatcher is foo-[dbname].xql, foo.xql then finally foo.tcl.
You may want to look at the APM. go to http://foohost/acs-admin/apm. Then click on the package where you have your xql. Somewhere below the package there is "Manage files... blah". After clicking here you will see a list of files for that package. Scroll down and click on "scan for new files... blah". Then add your xql.
Take the above with a big grain of salt since its been a while I have done OACS coding. But I know this might help.
