[GitHub] marcaurele commented on issue #2247: CLOUDSTACK-10012: Load SQL schema scripts from JAR

[gi...@git.apache.org]

marcaurele commented on issue #2247: CLOUDSTACK-10012: Load SQL schema scripts from JAR
URL: https://github.com/apache/cloudstack/pull/2247#issuecomment-331806489
 
 
   From our experience on this change that is running in production for us, we can deploy a new SQL schema/lab with the usual mvn developer script, as well as upgrading the DB on schema changes. If a customization is needed, we should invert the way the upgrades are executed and do a package scan on classes rather than declaring them "statically" in `DatabaseUpgradeChecker`. It should help anyone to extend an upgrade class to add extra changes. The upgrade classes should declare themselves the version from which they should be run, and the DB version after the upgrade. With the help of a Comparable, we could sort them in the correct order, and even skip over unneeded ones if a class declares a bigger upgrade path.
 
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