yjhjstz opened a new pull request, #1209:
URL: https://github.com/apache/cloudberry/pull/1209
```sql
performing post-bootstrap initialization ... 2025-07-01 19:48:42.006 PDT
[14888] FATAL: role """ does not exist at character 72
2025-07-01 19:48:42.006 PDT [14888] STATEMENT:
UPDATE pg_class SET relacl = (SELECT array_agg(a.acl) FROM (SELECT
E'=r/""' as acl UNION SELECT unnest(pg_catalog.acldefault( CASE WHEN
relkind = 'S' THEN 's' ELSE 'r' END::"char",10::oid)) ) as a) WHERE
relkind IN ('r', 'v', 'm', 'S') AND relacl IS NULL;
````
Previously, passing an empty string to the -U or --username option (e.g.,
`initdb -U ''`) would cause confusing errors during bootstrap, as initdb
attempted to create a role with an empty name.
This patch adds an explicit check for empty usernames and exits immediately
with a clear error message.
A test case is added to verify that initdb fails when -U is given an empty
string.
Fixes #ISSUE_Number
### What does this PR do?
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### Type of Change
- [ ] Bug fix (non-breaking change)
- [ ] New feature (non-breaking change)
- [ ] Breaking change (fix or feature with breaking changes)
- [ ] Documentation update
### Breaking Changes
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### Test Plan
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- [ ] Unit tests added/updated
- [ ] Integration tests added/updated
- [ ] Passed `make installcheck`
- [ ] Passed `make -C src/test installcheck-cbdb-parallel`
### Impact
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**Performance:**
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**User-facing changes:**
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**Dependencies:**
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### Checklist
- [ ] Followed [contribution
guide](https://cloudberry.apache.org/contribute/code)
- [ ] Added/updated documentation
- [ ] Reviewed code for security implications
- [ ] Requested review from [cloudberry
committers](https://github.com/orgs/apache/teams/cloudberry-committers)
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