Michael Smith has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/23803


Change subject: IMPALA-14638: Schedule union of iceberg metadata scanner to 
coordinator
......................................................................

IMPALA-14638: Schedule union of iceberg metadata scanner to coordinator

On clusters with dedicated coordinators and executors the Iceberg
metadata scanner fragment(s) must be scheduled to coordinators.
IMPALA-12809 ensured this for most plans, but if the Iceberg metadata
scanner is part of a union of unpartitioned fragments a new fragment is
created for the union that subsumes existing fragments and loses the
coordinatorOnly flag.

Fixes cases where a multi-fragment plan includes a union of iceberg
metadata scans by setting coordinatorOnly on the new union fragment.
Adds a new test for this case.

Change-Id: If2f19945037b4a7a6433cd9c6e7e2b352fae7356
---
M fe/src/main/java/org/apache/impala/planner/DistributedPlanner.java
M tests/custom_cluster/test_coordinators.py
2 files changed, 12 insertions(+), 1 deletion(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/03/23803/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: If2f19945037b4a7a6433cd9c6e7e2b352fae7356
Gerrit-Change-Number: 23803
Gerrit-PatchSet: 1
Gerrit-Owner: Michael Smith <[email protected]>

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