hubgeter opened a new pull request, #57012:
URL: https://github.com/apache/doris/pull/57012
### What problem does this PR solve?
Problem Summary:
In the previous MaxCompute architecture, and its mapping in Doris, the
hierarchy was: `project / database -> table / table`. When creating a catalog,
users needed to specify the property `mc.default.project`, which indicated the
default project to access. In this structure, executing `SHOW DATABASES` would
list other projects.
After MaxCompute introduced the concept of schemas, the hierarchy changed
to: `project / catalog -> schema / database -> table / table`. Here, the
project is at a higher level, and `SHOW DATABASES` should now list all schemas
under the current project. As a result, users need to create a separate catalog
for each project, specifying a different `mc.default.project` property.
doc:
https://help.aliyun.com/zh/maxcompute/user-guide/schema-related-operations?spm=a2c4g.11186623.help-menu-search-27797.d_0#9d8326491bagj
To maintain compatibility with the old version, a catalog property
`mc.project.schema.table` is introduced:
- When the property is true, the new architecture is used.
- When the property is false, the old architecture is used.
### Release note
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [x] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [x] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [x] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
i will update doc after the pr merge.
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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