The above described issue is gone when we moved from Vertica 7.1 to 7.2

I am running a sequence of MERGE INTO operations of the following kind: MERGE /*+ direct */ INTO target_table T USING source_table S ON (T.key1 = S.key1 AND T.key2 = S.key2) WHEN NOT MATCHED THEN INSERT (key1, key2, field1, field2) VALUES (S.key1, S.key2, S.field1, S.field2) where both source and ta...