Thanks everyone for the feedback. I attach a version with the fixes
that were submitted, as well as some additional changes:
- I removed the restriction for tables inheritance and added the sample
I showed to regression.
- I added DO NOTHING support to the WHERE MATCHED case; it previously
only covered WHERE NOT MATCHED.
I was thinking earlier that it may be possible to clean up the
parse_merge.c code by using another RangeTblRef to process the data
source RTE. Haven't tried yet.
This stuff is all in
https://github.com/alvherre/postgres/commits/merge-15
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Álvaro Herrera 39°49'30"S 73°17'W — https://www.EnterpriseDB.com/
"Nunca confiaré en un traidor. Ni siquiera si el traidor lo he creado yo"
(Barón Vladimir Harkonnen)