Re: Constraints not check indexes existence on creation.

Viacheslav N Tararin <taras@dekasoft.com.ua> writes:
> Why alter table commands not check index existence?

What do you want them to do exactly?  Error out if there's an equivalent
index in place already?  Absorb the index as the implementation of the
constraint?  I don't really like either of those ...

            regards, tom lane