Hi,
I find it a little confusing how 38.6.2.4. Simple CASE and 38.6.2.5.
Searched CASE is described. In Simple CASE is written
CASE search-expression
WHEN expression [,
and in 38.6.2.5. Searched CASE is written
CASE
WHEN boolean-expression
IMO speaking of a search-expression for the simple CASE and speaking of
a boolean-expression in between Searched Case is confusing because of
the use of the word "search". I would change it to that:
[snip]
38.6.2.4. Simple CASE
CASE
WHEN boolean-expression THEN
statements
[ WHEN boolean-expression THEN
statements
... ]
[ ELSE
statements ]
END CASE;
The simple form of CASE provides conditional execution based on truth of
boolean expressions. Each WHEN clause's boolean-expression is evaluated
in turn, until one is found that yields true. Then the corresponding
statements are executed, and then control passes to the next statement
after END CASE. (Subsequent WHEN expressions are not evaluated.) If no
true result is found, the ELSE statements are executed; but if ELSE is
not present, then a CASE_NOT_FOUND exception is raised.
[EXAMPLE ...]
38.6.2.5. Searched CASE
CASE search-expression
WHEN expression [, expression [ ... ]] THEN
statements
[ WHEN expression [, expression [ ... ]] THEN
statements
... ]
[ ELSE
statements ]
END CASE;
The searched form of CASE provides conditional execution based on
equality of operands. The search-expression is evaluated (once) and
successively compared to each expression in the WHEN clauses. If a match
is found, then the corresponding statements are executed, and then
control passes to the next statement after END CASE. (Subsequent WHEN
expressions are not evaluated.) If no match is found, the ELSE
statements are executed; but if ELSE is not present, then a
CASE_NOT_FOUND exception is raised.
[EXAMPLE ...]
[snip]
I moved 38.6.2.5 to 38.6.2.4 and changed the naming ...
Thoughts?
Cheers
Andy
