Pavel Stehule <pavel.stehule@gmail.com> writes:
> Is there some description of what keywords should be reserved? If I
> remember correctly, the scanner was changed more times, and maybe more
> reserved keywords are not necessary.
Per the comment in pl_scanner.c:
* We try to avoid reserving more keywords than we have to; but there's
* little point in not reserving a word if it's reserved in the core grammar.
* Currently, the following words are reserved here but not in the core:
* BEGIN BY DECLARE EXECUTE FOREACH IF LOOP STRICT WHILE
This patch gets rid of EXECUTE and STRICT, but the others are harder
to de-reserve. I think most of the rest are there because they can
follow a block or loop label, and the same comment observes
* (We still have to reserve initial keywords that might follow a block
* label, unfortunately, since the method used to determine if we are at
* start of statement doesn't recognize such cases.
regards, tom lane
