Github user zellerh commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/380#discussion_r56224510
--- Diff: core/sql/optimizer/BindRelExpr.cpp ---
@@ -10171,17 +10164,26 @@ matched clause of merge). If the upsert caused a
row to be updated in the
base table then the old version of the row will have to be deleted from
indexes, and a new version inserted. Upsert is being transformed to merge
so that we can delete the old version of an updated row from the index.
+
--- End diff --
The comment above mentions LP 1460771. I think that's TRAFODION-14 now.
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