Re: database not enforcing unqiue constriant

Merlin Moncure wrote:
> My previous employer contacted me today. Apparently they are having
> an increasing frequency of occurances where they disocover violations
> of the primary key constraint not being caught by the database. This
> system is an ISAM emulation system, and it relies heavily on the
> database throwing unique constraint violations to approximately
> provide a cobol rewrite statement.
>
> These errors are never caught when they occur. One way they are
> caught is during a dump/reload, the record fails to reinsert.
>
> I brought this up around a year ago, and the issue was never
> successfully resolved. These are windows systems running PostgreSQL
> 8.0.x.
>
> any thoughts?

Do they vacuum enough? I have seen problems with PostgreSQL (albeit not
since 7.3) where a unique constraint would not enforce because of index
bloat.

Sincerely,

Joshua D. Drake

>
> merlin
>
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