oracleloyall opened a new issue, #1593:
URL: https://github.com/apache/cloudberry/issues/1593
### Apache Cloudberry version
Latest main branch
### What happened
```
======================================================================
DIFF FILE: /workspace/database/src/test/regress/regression.diffs
----------------------------------------------------------------------
diff -I HINT: -I CONTEXT: -I GP_IGNORE: -U3
/workspace/database/src/test/regress/expected/orca_parallel.out
/workspace/database/src/test/regress/results/orca_parallel.out
--- /workspace/database/src/test/regress/expected/orca_parallel.out
2026-03-02 14:57:53.726035231 +0800
+++ /workspace/database/src/test/regress/results/orca_parallel.out
2026-03-02 14:57:53.754037247 +0800
@@ -690,18 +690,30 @@
___________
Gather Motion 6:1 (slice1; segments: 6)
Output: pidx1.a, pidx1.b
- -> Parallel Hash Semi Join
+ -> Result
Output: pidx1.a, pidx1.b
- Hash Cond: (pidx1.a = pidx2.c)
- -> Parallel Index Scan using pidx1_a_idx on orca_parallel.pidx1
- Output: pidx1.a, pidx1.b
- Index Cond: (pidx1.a < 500)
- -> Parallel Hash
- Output: pidx2.c
- -> Parallel Index Only Scan using pidx2_c_idx on
orca_parallel.pidx2
- Output: pidx2.c
- Index Cond: (pidx2.c < 500)
-GP_IGNORE:(15 rows)
+ -> Unique
+ Output: pidx1.a, pidx1.b, (RowIdExpr)
+ Group Key: (RowIdExpr)
+ -> Sort
+ Output: pidx1.a, pidx1.b, (RowIdExpr)
+ Sort Key: (RowIdExpr)
+ -> Redistribute Motion 6:6 (slice2; segments: 6)
+ Output: pidx1.a, pidx1.b, (RowIdExpr)
+ Hash Key: (RowIdExpr)
+ Hash Module: 3
+ -> Parallel Hash Join
+ Output: pidx1.a, pidx1.b, (RowIdExpr)
+ Hash Cond: (pidx2.c = pidx1.a)
+ -> Parallel Index Only Scan using
pidx2_c_idx on orca_parallel.pidx2
+ Output: pidx2.c
+ Index Cond: (pidx2.c < 500)
+ -> Parallel Hash
+ Output: pidx1.a, pidx1.b, (RowIdExpr)
+ -> Parallel Index Scan using
pidx1_a_idx on orca_parallel.pidx1
+ Output: pidx1.a, pidx1.b,
RowIdExpr
+ Index Cond: (pidx1.a < 500)
+GP_IGNORE:(27 rows)
```
### What you think should happen instead
_No response_
### How to reproduce
CI test error, instability occurs
### Operating System
aarch64
### Anything else
_No response_
### Are you willing to submit PR?
- [ ] Yes, I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/cloudberry/blob/main/CODE_OF_CONDUCT.md).
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