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):
18.104.22.168. Simple CASE
WHEN value [, value [ ... ]] THEN
[ WHEN value [, value [ ... ]] THEN
Maybe it could also be value-expression ... but that I don't like that much.
Then we could go further with this:
22.214.171.124. General CASE
WHEN boolean-expression THEN
[ WHEN boolean-expression THEN
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
P.S.: I can provide a patch with the changes if we discussed it and are
willing to make a change
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