branch-4.0: [feature](maxcompute)support maxcompte catalog read project-schema-table. #57012 #57287
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…ble. (#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.
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Thank you for your contribution to Apache Doris. Please clearly describe your PR:
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run buildall |
yiguolei
approved these changes
Oct 24, 2025
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Cherry-picked from #57012