englefly opened a new pull request, #10009:
URL: https://github.com/apache/incubator-doris/pull/10009
# Proposed changes
when column is dict encoded, in_predicate::evaluate() put dict code of
IN_LIST into a set, and then compare the selected codes with column cells. The
selected dict codes are put into a map, by which the evaluate time is O(logN)
It is better to use a std::vector to indicated if a dict word is in IN_LIST,
by which the evaluate time shrinks to O(1).
test evn: ssb_flat 5G
test sql: simplified from ssb q.3.3
SELECT count(c_city) FROM lineorder_flat WHERE C_CITY in ('UNITED
KI1','UNITED KI5');
ShortPredEvalTime is decreased from 240ms to 170ms by average.
在测试环境中 ssb100-flat， 3BE q3.3 从291ms下降到248ms
Issue Number: close #xxx
## Problem Summary:
Describe the overview of changes.
## 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
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[[email protected]](mailto:[email protected]) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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