diff -r c357c4e69b9e -r aa22103809cd src/main/kotlin/de/uapcore/lightpit/dao/DataAccessObject.kt
--- a/src/main/kotlin/de/uapcore/lightpit/dao/DataAccessObject.kt	Fri Dec 30 13:21:09 2022 +0100
+++ b/src/main/kotlin/de/uapcore/lightpit/dao/DataAccessObject.kt	Fri Dec 30 19:04:34 2022 +0100
@@ -70,6 +70,7 @@
     fun collectIssueSummary(project: Project): IssueSummary
     fun collectIssueSummary(assignee: User): IssueSummary
 
+    fun listIssues(project: Project): List<Issue>
     fun listIssues(project: Project, version: Version?, component: Component?): List<Issue>
     fun findIssue(id: Int): Issue?
     fun insertIssue(issue: Issue): Int
@@ -80,6 +81,13 @@
     fun insertComment(issueComment: IssueComment): Int
     fun updateComment(issueComment: IssueComment)
 
+    /**
+     * Inserts an issue relation, if it does not already exist.
+     */
+    fun insertIssueRelation(rel: IssueRelation)
+    fun deleteIssueRelation(rel: IssueRelation)
+    fun listIssueRelations(issue: Issue): List<IssueRelation>
+
     fun insertHistoryEvent(issue: Issue, newId: Int = 0)
     fun insertHistoryEvent(issue: Issue, issueComment: IssueComment, newId: Int = 0)