Robert Haas wrote:

> Yeah, I think it's dead certain that such code exists, and, ahem, not
> only in our tree.  I suspect that EDB is not the only organization
> that has written code that involves comparing error levels.  Putting
> the flags in the low-order bits seems like it might be workable, but I
> think using a high-order bit is right out.

We could redefine elevel as a struct when assertions are enabled, and
provide functions to do the < comparisons in that case; they would
reduce to regular integers when assertions are disabled.  That would
raise compile-time errors in all places that need to be updated.

Álvaro Herrera      
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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