AshinGau opened a new pull request, #11156:
URL: https://github.com/apache/doris/pull/11156
# Proposed changes
Support pruning buckets for hive bucket table.
## Notes
1. Spark currently does not populate bucketed output which is compatible
with Hive, so spark bucket table is not supported in current implementation.
2. Hive 3.0 introduced bucket version 2, but doris still uses hive 2.3.7
which lacks the hash function of version 2, so I refer to the implementation of
Trino and copy the hash function from hive.
3. Current implementation doest not support the table with multiple bucketed
columns, and only support `Equal` and `In` predicates.
## Profit
Suppose `lineitem` table in tpch(sf=100) is bucketed by l_orderkey into 96
buekts, when query:
```
select count(*) from lineitem where l_orderkey = 1;
```
Splits scanning reduced from 144 to 6.
## Checklist(Required)
1. Does it affect the original behavior: (No)
4. Has unit tests been added: (No)
5. Has document been added or modified: (No)
6. Does it need to update dependencies: (No)
7. Are there any changes that cannot be rolled back: (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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