Re: wording for 38.6.2.4. Simple CASE and 38.6.2.5. Searched CASE

Tom Lane wrote:
> Hmm, it would be important to keep this in sync with the core-SQL
> description of CASE, no? (Section 9.16.1)

yes. And there is written "general" form and "simple" form. I like that.

> I can't say that I think "simple CASE" and "searched CASE" are good
> descriptions of the two forms, but just switching them doesn't make it
> much better. And doing so would likely create as much confusion as
> it eliminates. Can we come up with some other phrases?

IMO it should be the same like in 9.16.1 - a "general" form and a
"simple" form. Then changing both sections would be ok, because in
9.16.1 the simple form is mentioned after the general form.

Would it be correct to change it in this direction - or is this
logically wrong (change expression to value):

38.6.2.4. Simple CASE

CASE expression
WHEN value [, value [ ... ]] THEN
statements
[ WHEN value [, value [ ... ]] THEN
statements
... ]
[ ELSE
statements ]
END CASE;

Maybe it could also be value-expression ... but that I don't like that much.

Then we could go further with this:

38.6.2.5. General CASE

CASE
WHEN boolean-expression THEN
statements
[ WHEN boolean-expression THEN
statements
... ]
[ ELSE
statements ]
END CASE;

The general form of CASE provides conditional execution based on truth
of boolean expressions. ...

I think with these changes, 9.16.1 and this two sections are working
together

Cheers

Andy

P.S.: I can provide a patch with the changes if we discussed it and are
willing to make a change