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Cherry-picked from #56449

Union operator picks a wrong distribute expr now.
@hello-stephen
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Thank you for your contribution to Apache Doris.
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Please clearly describe your PR:

  1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
  2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
  3. What features were added. Why was this function added?
  4. Which code was refactored and why was this part of the code refactored?
  5. Which functions were optimized and what is the difference before and after the optimization?

@dataroaring dataroaring reopened this Sep 28, 2025
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run buildall

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ClickBench: Total hot run time: 30.6 s
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/clickbench-tools
ClickBench test result on commit 0d8b1cf1af2196504e45074ff3c46a56de477568, data reload: false

query1	0.05	0.05	0.05
query2	0.09	0.05	0.06
query3	0.26	0.08	0.08
query4	1.62	0.12	0.12
query5	0.27	0.25	0.24
query6	1.16	0.65	0.63
query7	0.03	0.02	0.03
query8	0.06	0.05	0.05
query9	0.60	0.53	0.52
query10	0.60	0.57	0.57
query11	0.16	0.12	0.11
query12	0.16	0.12	0.12
query13	0.62	0.62	0.62
query14	1.07	1.06	1.04
query15	0.86	0.86	0.85
query16	0.40	0.40	0.44
query17	1.03	1.05	1.03
query18	0.21	0.20	0.19
query19	1.99	1.79	1.88
query20	0.02	0.02	0.02
query21	15.38	0.93	0.58
query22	0.76	1.25	0.78
query23	14.86	1.38	0.65
query24	6.67	2.08	0.95
query25	0.48	0.25	0.14
query26	0.62	0.16	0.12
query27	0.08	0.06	0.06
query28	10.29	1.37	0.92
query29	12.60	3.86	3.23
query30	0.27	0.13	0.12
query31	2.85	0.59	0.38
query32	3.25	0.55	0.48
query33	3.02	3.13	3.15
query34	16.25	5.40	4.82
query35	4.87	4.89	4.89
query36	0.71	0.52	0.49
query37	0.10	0.07	0.07
query38	0.07	0.06	0.04
query39	0.03	0.04	0.03
query40	0.18	0.16	0.13
query41	0.09	0.04	0.03
query42	0.04	0.03	0.03
query43	0.05	0.04	0.03
Total cold run time: 104.78 s
Total hot run time: 30.6 s

@yiguolei yiguolei merged commit dcbc11a into branch-4.0 Sep 28, 2025
21 of 24 checks passed
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6 participants