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Posted to commits@doris.apache.org by "Mryange (via GitHub)" <gi...@apache.org> on 2026/05/18 08:12:29 UTC
[PR] [opt](exec) skip result serialization for dry run queries [doris]
Mryange opened a new pull request, #63356:
URL: https://github.com/apache/doris/pull/63356
### What problem does this PR solve?
Issue Number: N/A
Related PR: None
Problem Summary:
When dry_run_query is enabled, FE only needs the returned row count, but BE still spends most of PhysicalResultSink time serializing MySQL result rows and materializing Arrow output blocks. In a local dry-run case against numbers("number"="1000000"), the profile showed AppendBatchTime = 77.689ms, TupleConvertTime = 68.650ms, and ResultSendTime = 2.702us, which means the dry-run path was still paying almost the full result sink conversion cost.
This change keeps output expr evaluation intact, but returns early in the MySQL and Arrow result writers once the output block is produced in dry-run mode. That preserves returned row accounting while skipping result serialization, block copy, and sink enqueue work that dry-run queries never consume.
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg: https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should merge into -->
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4517763473
PR approved by at least one committer and no changes requested.
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "Mryange (via GitHub)" <gi...@apache.org>.
Mryange commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4475979930
run buildall
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "hello-stephen (via GitHub)" <gi...@apache.org>.
hello-stephen commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4477155997
<details>
<summary>TPC-H: <b>Total hot run time: 31404 ms</b></summary>
```
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit 176fa8a9be1ba2a6c984334c2abdbf9435fd2669, data reload: false
------ Round 1 ----------------------------------
orders Doris NULL NULL 0 0 0 NULL 0 NULL NULL 2023-12-26 18:27:23 2023-12-26 18:42:55 NULL utf-8 NULL NULL
============================================
q1 17755 3904 3815 3815
q2 q3 10776 1367 777 777
q4 4688 482 342 342
q5 7699 2258 2100 2100
q6 233 174 135 135
q7 959 788 640 640
q8 9359 1733 1614 1614
q9 5163 4890 4851 4851
q10 6412 2067 1786 1786
q11 432 264 242 242
q12 621 411 290 290
q13 18138 3373 2799 2799
q14 262 256 242 242
q15 q16 818 774 706 706
q17 989 1037 920 920
q18 6829 5673 5598 5598
q19 1310 1348 1031 1031
q20 502 407 439 407
q21 6343 2851 2724 2724
q22 463 401 385 385
Total cold run time: 99751 ms
Total hot run time: 31404 ms
----- Round 2, with runtime_filter_mode=off -----
orders Doris NULL NULL 150000000 42 6422171781 NULL 22778155 NULL NULL 2023-12-26 18:27:23 2023-12-26 18:42:55 NULL utf-8 NULL NULL
============================================
q1 4617 4622 4565 4565
q2 q3 4842 5301 4634 4634
q4 2118 2211 1397 1397
q5 5029 4769 4654 4654
q6 237 176 142 142
q7 1952 1796 1612 1612
q8 2438 2103 2180 2103
q9 7731 7414 7396 7396
q10 4541 4501 4042 4042
q11 526 372 348 348
q12 705 728 503 503
q13 3042 3438 2760 2760
q14 263 276 255 255
q15 q16 669 690 618 618
q17 1264 1228 1213 1213
q18 7161 6922 6648 6648
q19 1108 1074 1083 1074
q20 2202 2219 1924 1924
q21 5301 4616 4472 4472
q22 509 476 409 409
Total cold run time: 56255 ms
Total hot run time: 50769 ms
```
</details>
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "hello-stephen (via GitHub)" <gi...@apache.org>.
hello-stephen commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4477208025
# BE Regression && UT Coverage Report
Increment line coverage `62.50% (5/8)` :tada:
[Increment coverage report](http://coverage.selectdb-in.cc/coverage/63356_176fa8a9be1ba2a6c984334c2abdbf9435fd2669_merge/increment_report/index.html)
[Complete coverage report](http://coverage.selectdb-in.cc/coverage/63356_176fa8a9be1ba2a6c984334c2abdbf9435fd2669_merge/report/index.html)
| Category | Coverage |
|-------------------|--------------------|
| Function Coverage | 73.56% (27804/37799) |
| Line Coverage | 57.49% (301080/523719) |
| Region Coverage | 54.88% (252367/459834) |
| Branch Coverage | 56.26% (108787/193348) |
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "Mryange (via GitHub)" <gi...@apache.org>.
Mryange commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4477805576
/review
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "hello-stephen (via GitHub)" <gi...@apache.org>.
hello-stephen commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4475690795
Thank you for your contribution to Apache Doris.
Don't know what should be done next? See [How to process your PR](https://cwiki.apache.org/confluence/display/DORIS/How+to+process+your+PR).
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?
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "Mryange (via GitHub)" <gi...@apache.org>.
Mryange merged PR #63356:
URL: https://github.com/apache/doris/pull/63356
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "hello-stephen (via GitHub)" <gi...@apache.org>.
hello-stephen commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4479334345
<details>
<summary>TPC-DS: <b>Total hot run time: 169209 ms</b></summary>
```
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpcds-tools
TPC-DS sf100 test result on commit cf8e0d377f942e2cf32ca79a015d8682afbad76e, data reload: false
query5 4363 659 499 499
query6 344 218 199 199
query7 4262 583 296 296
query8 320 226 212 212
query9 8810 3961 3979 3961
query10 458 336 290 290
query11 5784 2370 2248 2248
query12 185 134 131 131
query13 1310 583 418 418
query14 5998 5338 5035 5035
query14_1 4364 4404 4303 4303
query15 211 201 178 178
query16 1003 450 427 427
query17 1138 716 586 586
query18 2530 472 351 351
query19 219 204 161 161
query20 134 129 129 129
query21 216 140 116 116
query22 13644 13521 13426 13426
query23 17202 16388 16021 16021
query23_1 16178 16224 16221 16221
query24 7486 1746 1272 1272
query24_1 1284 1301 1284 1284
query25 538 467 417 417
query26 1173 333 164 164
query27 2686 564 338 338
query28 4434 2027 1894 1894
query29 986 613 489 489
query30 307 240 199 199
query31 1117 1053 942 942
query32 92 81 70 70
query33 552 349 297 297
query34 1161 1118 643 643
query35 768 788 671 671
query36 1337 1308 1180 1180
query37 152 100 93 93
query38 3201 3146 3033 3033
query39 939 934 908 908
query39_1 893 875 881 875
query40 228 144 120 120
query41 64 62 61 61
query42 111 107 106 106
query43 318 332 288 288
query44
query45 213 203 205 203
query46 1067 1181 712 712
query47 2262 2407 2214 2214
query48 373 425 299 299
query49 671 500 380 380
query50 1049 359 243 243
query51 4308 4302 4252 4252
query52 103 104 94 94
query53 261 285 204 204
query54 310 266 246 246
query55 91 93 84 84
query56 300 327 309 309
query57 1431 1442 1374 1374
query58 298 274 257 257
query59 1597 1710 1492 1492
query60 329 330 305 305
query61 163 161 174 161
query62 685 644 570 570
query63 245 200 204 200
query64 2245 815 643 643
query65
query66 1701 480 352 352
query67 29980 29940 29832 29832
query68
query69 467 335 305 305
query70 998 967 950 950
query71 302 273 265 265
query72 3016 2876 2664 2664
query73 820 762 431 431
query74 5098 4925 4776 4776
query75 2711 2585 2273 2273
query76 2305 1137 753 753
query77 409 408 344 344
query78 12092 12196 11603 11603
query79 1428 1068 696 696
query80 686 576 488 488
query81 453 278 241 241
query82 1307 162 126 126
query83 360 283 268 268
query84 275 145 118 118
query85 989 613 537 537
query86 393 330 344 330
query87 3391 3380 3247 3247
query88 3495 2641 2594 2594
query89 446 383 336 336
query90 1850 172 172 172
query91 181 175 140 140
query92 83 76 74 74
query93 1527 1502 859 859
query94 549 349 328 328
query95 661 467 349 349
query96 1018 801 328 328
query97 2708 2711 2568 2568
query98 238 227 231 227
query99 1119 1110 950 950
Total cold run time: 252586 ms
Total hot run time: 169209 ms
```
</details>
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "hello-stephen (via GitHub)" <gi...@apache.org>.
hello-stephen commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4479237950
<details>
<summary>TPC-H: <b>Total hot run time: 30667 ms</b></summary>
```
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit cf8e0d377f942e2cf32ca79a015d8682afbad76e, data reload: false
------ Round 1 ----------------------------------
orders Doris NULL NULL 0 0 0 NULL 0 NULL NULL 2023-12-26 18:27:23 2023-12-26 18:42:55 NULL utf-8 NULL NULL
============================================
q1 17634 3874 3865 3865
q2 q3 10752 1355 821 821
q4 4680 468 344 344
q5 7579 2219 2084 2084
q6 237 172 135 135
q7 975 746 642 642
q8 9385 1637 1509 1509
q9 6378 4923 4854 4854
q10 6465 2099 1772 1772
q11 447 277 249 249
q12 701 423 294 294
q13 18243 3363 2785 2785
q14 265 255 230 230
q15 q16 813 778 700 700
q17 1022 846 886 846
q18 6900 5705 5530 5530
q19 1220 1197 1066 1066
q20 511 409 258 258
q21 5806 2544 2379 2379
q22 452 359 304 304
Total cold run time: 100465 ms
Total hot run time: 30667 ms
----- Round 2, with runtime_filter_mode=off -----
orders Doris NULL NULL 150000000 42 6422171781 NULL 22778155 NULL NULL 2023-12-26 18:27:23 2023-12-26 18:42:55 NULL utf-8 NULL NULL
============================================
q1 4239 4122 4132 4122
q2 q3 4531 4939 4362 4362
q4 2398 2226 1390 1390
q5 4389 4270 4326 4270
q6 224 175 127 127
q7 2131 1834 1643 1643
q8 2554 2190 2071 2071
q9 7797 7893 7841 7841
q10 4520 4469 4022 4022
q11 579 423 369 369
q12 719 739 522 522
q13 3386 3701 2952 2952
q14 307 290 288 288
q15 q16 736 737 670 670
q17 1331 1314 1324 1314
q18 7947 7295 7036 7036
q19 1094 1078 1098 1078
q20 2219 2218 1918 1918
q21 5343 4611 4479 4479
q22 522 480 435 435
Total cold run time: 56966 ms
Total hot run time: 50909 ms
```
</details>
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "Mryange (via GitHub)" <gi...@apache.org>.
Mryange commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4478616044
run buildall
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "Mryange (via GitHub)" <gi...@apache.org>.
Mryange commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4475689341
/review
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "hello-stephen (via GitHub)" <gi...@apache.org>.
hello-stephen commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4480187320
# BE Regression && UT Coverage Report
Increment line coverage `100.00% (4/4)` :tada:
[Increment coverage report](http://coverage.selectdb-in.cc/coverage/63356_cf8e0d377f942e2cf32ca79a015d8682afbad76e_merge/increment_report/index.html)
[Complete coverage report](http://coverage.selectdb-in.cc/coverage/63356_cf8e0d377f942e2cf32ca79a015d8682afbad76e_merge/report/index.html)
| Category | Coverage |
|-------------------|--------------------|
| Function Coverage | 73.60% (27825/37804) |
| Line Coverage | 57.54% (301359/523745) |
| Region Coverage | 54.85% (252221/459847) |
| Branch Coverage | 56.35% (108948/193352) |
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "hello-stephen (via GitHub)" <gi...@apache.org>.
hello-stephen commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4477249565
<details>
<summary>TPC-DS: <b>Total hot run time: 169944 ms</b></summary>
```
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpcds-tools
TPC-DS sf100 test result on commit 176fa8a9be1ba2a6c984334c2abdbf9435fd2669, data reload: false
query5 4309 667 527 527
query6 333 216 200 200
query7 4214 561 314 314
query8 327 236 235 235
query9 8916 4006 4030 4006
query10 441 334 296 296
query11 5738 2427 2237 2237
query12 181 126 122 122
query13 1269 614 435 435
query14 6023 5359 5064 5064
query14_1 4375 4412 4389 4389
query15 215 202 179 179
query16 987 473 443 443
query17 1139 704 586 586
query18 2483 484 356 356
query19 212 200 161 161
query20 142 131 130 130
query21 210 140 124 124
query22 13559 13557 13440 13440
query23 17324 16389 15939 15939
query23_1 16202 16081 16071 16071
query24 7470 1743 1306 1306
query24_1 1298 1306 1285 1285
query25 545 480 434 434
query26 1295 329 181 181
query27 2737 550 341 341
query28 4449 1972 1934 1934
query29 1013 622 494 494
query30 298 238 196 196
query31 1141 1075 932 932
query32 98 77 75 75
query33 563 344 298 298
query34 1182 1101 620 620
query35 765 778 685 685
query36 1348 1323 1165 1165
query37 155 106 90 90
query38 3251 3126 3060 3060
query39 934 908 886 886
query39_1 886 903 898 898
query40 223 146 123 123
query41 64 63 62 62
query42 110 109 108 108
query43 322 327 284 284
query44
query45 212 201 191 191
query46 1055 1174 764 764
query47 2281 2312 2191 2191
query48 399 382 302 302
query49 634 490 387 387
query50 985 337 260 260
query51 4279 4276 4180 4180
query52 106 105 94 94
query53 257 285 204 204
query54 322 279 256 256
query55 92 91 84 84
query56 310 294 303 294
query57 1423 1414 1315 1315
query58 302 271 273 271
query59 1551 1602 1450 1450
query60 324 319 316 316
query61 158 159 161 159
query62 664 614 550 550
query63 249 206 208 206
query64 2469 837 739 739
query65
query66 1728 490 363 363
query67 30031 29967 29252 29252
query68
query69 474 341 306 306
query70 1024 990 954 954
query71 301 275 272 272
query72 2988 2693 2397 2397
query73 860 745 406 406
query74 5084 4917 4719 4719
query75 2682 2591 2262 2262
query76 2291 1143 735 735
query77 399 413 326 326
query78 12136 12088 11799 11799
query79 1303 1030 760 760
query80 640 557 476 476
query81 454 281 246 246
query82 244 163 125 125
query83 274 285 266 266
query84 278 141 113 113
query85 960 619 535 535
query86 373 330 343 330
query87 3396 3404 3250 3250
query88 3523 2674 2655 2655
query89 433 403 346 346
query90 2182 179 188 179
query91 190 188 154 154
query92 80 80 77 77
query93 1504 1464 850 850
query94 542 389 331 331
query95 728 385 352 352
query96 1012 736 340 340
query97 2682 2687 2575 2575
query98 238 245 228 228
query99 1093 1125 972 972
Total cold run time: 251842 ms
Total hot run time: 169944 ms
```
</details>
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Re: [PR] [opt](exec) skip result serialization for dry run queries [doris]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on PR #63356:
URL: https://github.com/apache/doris/pull/63356#issuecomment-4517763788
PR approved by anyone and no changes requested.
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