EmmyMiao87 opened a new pull request, #8979:
URL: https://github.com/apache/incubator-doris/pull/8979
# Proposed changes
Issue Number: close #xxx
## Problem Summary:
Vectorized code will occur `core` in the case of ```outer join + not null
column```, such as issue #7901
So we need to fall back from vectorized mode to non-vectorized mode when we
encounter this situation.
If the nullside column of the outer join is a column that must return
non-null like count(*)
then there is no way to force the column to be nullable.
At this time, vectorization cannot support this situation,
so it is necessary to fall back to non-vectorization for processing.
For example:
Query: set enable_vectorized_engine=true
Query: select * from t1 left join (select k1, count(k2) as count_k2 from
t2 group by k1) tmp on t1.k1=tmp.k1
Result: Query goes non-vectorized engine
## Checklist(Required)
1. Does it affect the original behavior: (Yes/No/I Don't know)
2. Has unit tests been added: (Yes/No/No Need)
3. Has document been added or modified: (Yes/No/No Need)
4. Does it need to update dependencies: (Yes/No)
5. Are there any changes that cannot be rolled back: (Yes/No)
## 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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