What needs to be done to be able to view issues added from Testlink execution page on JIRA. I was able to add an issue which is reflected in the execution_bugs table, but how or where can I see this on JIRA?
If you link a bug from Jira during the "execution" phase it should show up in the UI on the execution of that test case. It will also show details in the reports you generate (if there is a bug and if that report has a column for bugs to be shown).
I have Testlink working with JIRA. I expect your problem has probably to do with the Oracle driver on the box running Testlink. Also, you may have to make some slight code modifications. I have outlined in detail what needs to be done in this thread: