Bruce Momjian wrote:

However, I see CREATE ROLE doesn't have REPLACE functionality, so what
is the logic of when we need IF EXISTS and when we don't?  Perhaps they
all should have it, and the REPLACE is just for objects you want to
replace but keep existing linkage in place.

That was my understanding. I think these are orthogonal issues.

Another issue was MySQL compatibility. AFAIK we achieved that when we did database, following { table view index sequence schema type domain conversion}, which pretty much all had to be done together, as they share the same statement node type.



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