morningman opened a new pull request, #15660:
URL: https://github.com/apache/doris/pull/15660
# Proposed changes
Issue Number: close #xxx
## Problem summary
When creating an external catalog, Doris will automatically sync the schema
of table from external catalog.
But some of column type are not supported by Doris now, such as struct, map,
etc.
In previous, when meeting these unsupported column, Doris will throw an
exception, and the corresponding
table can not be synced. But user may just want to query other supported
columns.
In this PR, I add a new column type: UNSUPPORTED. And now it is just used
for external table schema sync.
When meeting unsupported column, it will be synced as column with
UNSUPPORTED type.
When query this table, there are serval situation:
1. `select * from table`: throw error `Unsupported type 'UNSUPPORTED_TYPE'
xxx`
2. `select k1 from table`: k1 is with supported type. query OK.
3. `select * except(k2)`: k2 is with unsupported type. query OK
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [ ] No
- [ ] I don't know
4. Has unit tests been added:
- [ ] Yes
- [ ] No
- [ ] No Need
5. Has document been added or modified:
- [ ] Yes
- [ ] No
- [ ] No Need
6. Does it need to update dependencies:
- [ ] Yes
- [ ] No
7. Are there any changes that cannot be rolled back:
- [ ] Yes (If Yes, please explain WHY)
- [ ] No
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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