The uprgade from 4.18.1.0 to 4.18.2.0-SNAPSHOT failed with error
```
2023-09-12 16:12:19,003 INFO [c.c.u.DatabaseUpgradeChecker] (main:null) (logid:) DB version = 4.18.1.0 Code Version = 4.18.2.0
2023-09-12 16:12:19,004 INFO [c.c.u.DatabaseUpgradeChecker] (main:null) (logid:) Database upgrade must be performed from 4.18.1.0 to 4.18.2.0
2023-09-12 16:12:19,036 DEBUG [c.c.u.DatabaseUpgradeChecker] (main:null) (logid:) Running upgrade Upgrade41800to41810 to upgrade from 4.18.0.0-4.18.1.0 to 4.18.1.0
...
2023-09-12 16:12:19,041 DEBUG [c.c.u.d.ScriptRunner] (main:null) (logid:) -- Schema upgrade from 4.18.0.0 to 4.18.1.0
...
2023-09-12 16:12:21,602 DEBUG [c.c.u.d.DatabaseAccessObject] (main:null) (logid:) Statement: CREATE INDEX i_cluster_details__name on cluster_details (name)
2023-09-12 16:12:21,663 DEBUG [c.c.u.d.DatabaseAccessObject] (main:null) (logid:) Created index i_cluster_details__name
2023-09-12 16:12:21,673 DEBUG [c.c.u.d.T.Transaction] (main:null) (logid:) Rolling back the transaction: Time = 2632 Name = Upgrade; called by -TransactionLegacy.rollback:888-TransactionLegacy.removeUpTo:831-TransactionLegacy.close:655-TransactionContextInterceptor.invoke:36-ReflectiveMethodInvocation.proceed:175-ExposeInvocationInterceptor.invoke:97-ReflectiveMethodInvocation.proceed:186-JdkDynamicAopProxy.invoke:215-$Proxy30.persist:-1-DatabaseUpgradeChecker.upgrade:319-DatabaseUpgradeChecker.check:403-CloudStackExtendedLifeCycle.checkIntegrity:64
```
It succeeded with this change.
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
(cherry picked from commit a88a47989369af204ea6ee8a5fd190311f43c74c)
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
Using a hierarchy of database version rather than a flat
list of them. Adding a new schema upgrade path was really
cumbersome and error-prone, because we needed to maintain
a flat map of versions and their corresponding list of
upgrade paths (`DbUpgrade`). Instead we're using a logical
hierarchy structure of versions:
```
DatabaseVersionHierarchy.builder()
.next("4.0.0" , new Upgrade40to41())
.next("4.0.1" , new Upgrade40to41())
.next("4.0.2" , new Upgrade40to41())
.next("4.1.0" , new Upgrade410to420())
.next("4.1.1" , new Upgrade410to420())
.next("4.2.0" , new Upgrade420to421())
...
.next("4.2.1" , new Upgrade421to430())
.next("4.9.3.0" , new Upgrade4930to41000())
.next("4.10.0.0", new Upgrade41000to41100())
.next("4.11.0.0", new Upgrade41100to41110())
.build();
```
With this change, when we need to add a new version upgrade
path, we only need to add it in correct place in the hierarchy
rather than add that in dozens of places in `_upgradeMap`.
Wei Zhou
Vishesh
dahn
Khosrow Moossavi