morningman opened a new pull request, #18152:
URL: https://github.com/apache/doris/pull/18152
# Proposed changes
Issue Number: close #xxx
## Problem summary
In previous, Doris does not support cross-db colocate join, because the a
colocate group belongs
to a certain database.
This PR supports cross-db colocate join.
User can create table with `colocate_with` properties with `__global__`
prefix group name, eg:
```
CREATE TABLE tbl (k1 int, v1 int sum)
DISTRIBUTED BY HASH(k1)
BUCKETS 8
PROPERTIES(
"colocate_with" = "__global__group1"
);
```
And the group `__global__group1` no longer belongs to a certain database,
but is global unique group.
## Checklist(Required)
* [ ] Does it affect the original behavior
* [ ] Has unit tests been added
* [ ] Has document been added or modified
* [ ] Does it need to update dependencies
* [ ] Is this PR support rollback (If NO, please explain WHY)
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[[email protected]](mailto:[email protected]) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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