cambyzju opened a new pull request, #10606: URL: https://github.com/apache/doris/pull/10606
# Proposed changes Issue Number: close #7570 ## Problem Summary: `collect_list` Returns an array consisting of all values in expr within the group. The order of elements in the array is non-deterministic. NULL values are excluded. `collect_set` Returns an array consisting of all unique values in expr within the group. The order of elements in the array is non-deterministic. NULL values are excluded. Usage example: ``` mysql> set enable_vectorized_engine=true; mysql> set enable_array_type = true; mysql> select k1,k2,k3 from collect_test order by k1; +------+------------+-------+ | k1 | k2 | k3 | +------+------------+-------+ | 1 | 2022-07-05 | hello | | 2 | 2022-07-04 | NULL | | 2 | 2022-07-04 | hello | | 3 | NULL | world | | 3 | NULL | world | +------+------------+-------+ mysql> select k1,collect_list(k2),collect_list(k3) from collect_test group by k1 order by k1; +------+--------------------------+--------------------+ | k1 | collect_list(`k2`) | collect_list(`k3`) | +------+--------------------------+--------------------+ | 1 | [2022-07-05] | [hello] | | 2 | [2022-07-04, 2022-07-04] | [hello] | | 3 | NULL | [world, world] | +------+--------------------------+--------------------+ mysql> select k1,collect_set(k2),collect_set(k3) from collect_test group by k1 order by k1; +------+-------------------+-------------------+ | k1 | collect_set(`k2`) | collect_set(`k3`) | +------+-------------------+-------------------+ | 1 | [2022-07-05] | [hello] | | 2 | [2022-07-04] | [hello] | | 3 | NULL | [world] | +------+-------------------+-------------------+ ``` ## 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 [d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you chose the solution you did and what alternatives you considered, etc... -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For additional commands, e-mail: commits-h...@doris.apache.org
