avamingli commented on code in PR #1219:
URL: https://github.com/apache/cloudberry/pull/1219#discussion_r2206134512
##########
src/backend/cdb/cdbpath.c:
##########
@@ -2622,7 +2622,15 @@ create_motion_path_for_insert(PlannerInfo *root,
GpPolicy *policy,
}
}
- subpath = cdbpath_create_broadcast_motion_path(root, subpath,
policy->numsegments);
+
+ /*
+ * planner may have add a top Motion eariler.
+ * Create table t1(id int) distributed randomly;
+ * Create table t2 as select random() from t1 distributed
replicated;
+ * Avoid Motion if there was already one.
+ */
+ if (!CdbPathLocus_IsReplicated(subpath->locus))
Review Comment:
Replicated is a Broadcast Motion.
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