Where is History info stored in jira database?
Assuming you mean the issue history, it's changeitem (for each field change) and changegroup (for each change - date, person, issue basically)
I noticed that Worklog is stored on worklog table but what about History?
This might also help:https://developer.atlassian.com/display/JIRADEV/Change+History
It looks like you're new here. Sign in or register to get started.