Robert Szefler wrote:
Oleg Broytmann wrote:
On Tue, May 09, 2006 at 01:33:10PM +0200, Robert Szefler wrote:
from sqlobjec.sqlbuilder import func, const
star = getattr(const, '*')
func.COUNT(star)
Works for me. But man, is this ugggly.
What would be a better API in this case?
Maybe const.STAR. Maybe make func.COUNT() generate COUNT(*). I don't
know exactly...
On a second thought making func.COUNT() generate COUNT(*) sounds just
right. It has a touch of mathematical elegance. Looking at COUNT(col1,
..., coln) as a composition of projection and the cardinality operator
it makes sense to consider COUNT(*) itself as a composition of identity
projection and cardinality operator. Thus, the '*' means identity
projection, or no projection at all: COUNT(*) corresponds to both
card(id(.)) and card(.) - looking that way, func.COUNT() is exactly right.
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