Now that we know that JIRA
schema definitions are maintained in
entitymodel.xml, let us have a look at extending the existing schema definitions. How would you extend the JIRA scheme if you wanted to add one or two custom tables into JIRA? Is it just about creating the new tables in our database? We will see that in this recipe.
For plugins, it is recommended to use Active Objects technology to persist data. The JIRA schema itself should be modified only when it is absolutely necessary to have pre-defined tables created in the JIRA database.
If the JIRA schema is modified, care must be taken during upgrades to port those changes to a new version. ...