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ID, primary key. Various WorklogPRO tables may reference a worklog through this ID column.
ISSUEID is ID of the Jira issue.
AUTHOR is the key of the user who created the worklog entry.
UPDATEAUTHOR is the key of the user who worked on the issue.
TIMEWORKED is the time spent value in seconds.
STARTDATE is the start date of the worklog.
CREATED is the time at which a worklog is created. It can be different than STARTDATE because you can register worklogs in the past or future.
UPDATED is the time worklog is updated. If worklog is not updated it has the same value CREATED.
WORKLOGBODY is the comment of worklog.
GROUPLEVEL and ROLELEVEL are for visibility of worklog comment.