Fix dropping of CWE table failing due to FK constraint

src/main/java/org/dependencytrack/upgrade/v4110/v4110Updater.java

@@ -40,9 +40,44 @@ public void executeUpgrade(final AlpineQueryManager qm, final Connection connect
     }
 
     private static void dropCweTable(final Connection connection) throws Exception {
-        LOGGER.info("Dropping CWE table");
-        try (final Statement stmt = connection.createStatement()) {
-            stmt.execute("DROP TABLE \"CWE\"");
+        final boolean shouldReEnableAutoCommit = connection.getAutoCommit();
+        connection.setAutoCommit(false);
+
+        try {
+            // In DT v4.4.x and older, the VULNERABILITY table had a foreign key constraint
+            // on the CWE table. Drop the constraint, the index on the CWE column, as well as
+            // the column itself if they still exist.
+            // Unfortunately, the FK constraint has a generic name, as it was generated by DataNucleus.
+            try (final Statement stmt = connection.createStatement()) {
+                LOGGER.info("Dropping foreign key constraint from \"VULNERABILITY\".\"CWE\"");
+                stmt.executeUpdate("""
+                        ALTER TABLE "VULNERABILITY" DROP CONSTRAINT IF EXISTS "VULNERABILITY_FK1"
+                        """);
+
+                LOGGER.info("Dropping index \"VULNERABILITY\".\"VULNERABILITY_CWE_IDX\"");
+                stmt.executeUpdate("""
+                        DROP INDEX IF EXISTS "VULNERABILITY"."VULNERABILITY_CWE_IDX"
+                        """);
+
+                LOGGER.info("Dropping column \"VULNERABILITY\".\"CWE\"");
+                stmt.executeUpdate("""
+                        ALTER TABLE "VULNERABILITY" DROP COLUMN IF EXISTS "CWE"
+                        """);
+
+                LOGGER.info("Dropping table CWE");
+                stmt.executeUpdate("""
+                        DROP TABLE IF EXISTS "CWE"
+                        """);
+            } catch (Exception e) {
+                connection.rollback();
+                throw e;
+            }
+
+            connection.commit();
+        } finally {
+            if (shouldReEnableAutoCommit) {
+                connection.setAutoCommit(true);
+            }
         }
     }