aminghadersohi opened a new pull request, #44364:
URL: https://github.com/apache/superset/pull/44364
### SUMMARY
`master` currently has **two alembic heads**, so `superset db upgrade`
aborts before applying anything:
```
ERROR [flask_migrate] Error: Multiple head revisions are present for given
argument 'head';
please specify a specific target revision, '<branchname>@head' to narrow to
a specific head,
or 'heads' for all heads
```
The two heads are:
| revision | down_revision |
|---|---|
| `e2f3a1b9c640` — merge purge-audit pruning and username index heads |
`("c7f53d184ea2", "88a01c781622")` |
| `0884f655c0a6` — merge task_dependencies with theme_editors heads |
`("7e2c9a4f1b83", "aa5fa339627c")` |
Neither is an ancestor of the other. The themes branch was long-lived and
carried its own merge revisions, which were computed against a `master` that
predated `e2f3a1b9c640`; merging it re-branched the graph.
This PR adds a single empty merge revision (`60f94cd6cd11`) with
`down_revision = ("0884f655c0a6", "e2f3a1b9c640")`. **There is no schema or
data change** — `upgrade()` and `downgrade()` are empty. It mirrors the shape
of the prior merge revision in `e2f3a1b9c640`.
This unblocks integration CI repo-wide: every open PR's integration legs are
dying in 1–2 minutes on this signature, before any tests run, including PRs
that add no migrations at all.
Note that the `enforce-single-migration-head` check does not catch this
class of break, because it only inspects the migrations a PR itself adds. It
passes green on PRs that are being broken by `master`'s divergent graph, so its
status says nothing about whether `master`'s graph has converged.
### BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF
N/A — migration graph change only.
### TESTING INSTRUCTIONS
Against a fresh SQLite metadata database:
```bash
# Before this change
$ superset db heads
0884f655c0a6 (head)
e2f3a1b9c640 (head)
$ superset db upgrade
ERROR [flask_migrate] Error: Multiple head revisions are present for given
argument 'head' ...
# After this change
$ superset db heads
60f94cd6cd11 (head)
$ superset db upgrade
INFO [alembic.runtime.migration] Running upgrade 0884f655c0a6, e2f3a1b9c640
-> 60f94cd6cd11,
Merge theme editors and purge audit heads.
# completes successfully
```
### ADDITIONAL INFORMATION
- [ ] Has associated issue:
- [ ] Required feature flags:
- [ ] Changes UI
- [x] Includes DB Migration (follow approval process in
[SIP-59](https://github.com/apache/superset/issues/13351))
- [ ] Migration is atomic, supports rollback & is backwards-compatible
- [ ] Confirm DB migration upgrade and downgrade tested
- [ ] Runtime estimates and downtime expectations provided
- [ ] Introduces new feature or API
- [ ] Removes existing feature or API
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