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The following commit(s) were added to refs/heads/main by this push:
new 9d86458739c Fix parallel worker assignment for partial paths
9d86458739c is described below
commit 9d86458739ce31871b9c7b2f81bf3343243e3de0
Author: Zhang Mingli <[email protected]>
AuthorDate: Mon Sep 22 16:21:50 2025 +0800
Fix parallel worker assignment for partial paths
fix https://github.com/apache/cloudberry/issues/1366
Update parallel_workers assignment to handle cases where partial paths
may have
parallel_workers = 0 after parallel-oblivious append. Move assignment
before
assertion and use pathnode->parallel_workers in the check.
Authored-by: Zhang Mingli [email protected]
---
src/backend/optimizer/util/pathnode.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/src/backend/optimizer/util/pathnode.c
b/src/backend/optimizer/util/pathnode.c
index 0347fe5030c..24b795dde17 100644
--- a/src/backend/optimizer/util/pathnode.c
+++ b/src/backend/optimizer/util/pathnode.c
@@ -2156,12 +2156,17 @@ set_append_path_locus(PlannerInfo *root, Path
*pathnode, RelOptInfo *rel,
* Partially fixed append issue.
* But there are still several locus can't be parallel so that we can't
handle it currently.
*/
- AssertImply(parallel_workers > 1 &&
+ /*
+ * After we try parallel-bolivious append, there could be possible that
partial paths with
+ * parallel_workers = 0, ex: a partial path and Motion to a path with
parallel_workers = 0.
+ */
+ pathnode->parallel_workers = targetlocus.parallel_workers;
+
+ AssertImply(pathnode->parallel_workers > 1 &&
!CdbPathLocus_IsEntry(targetlocus) &&
!CdbPathLocus_IsOuterQuery(targetlocus) &&
!CdbPathLocus_IsGeneral(targetlocus) &&
!CdbPathLocus_IsSingleQE(targetlocus),
targetlocus.parallel_workers > 1);
- pathnode->parallel_workers = targetlocus.parallel_workers;
*subpaths_out = new_subpaths;
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