sqlstring -- a library to build a SELECT statement

Steve Holden steve at holdenweb.com
Thu Oct 20 09:19:55 CEST 2005


Jason Stitt wrote:
> On Oct 19, 2005, at 9:18 PM, grunar at gmail.com wrote:
> 
> <snip>
> 
>>My solution is sqlstring. A single-purpose library: to create SQL
>>statement objects. These objects (such as sqlstring.Select), represent
>>complex SQL Statements, but as Python objects.
> 
> 
> <snip>
> 
> First of all, I like this idea. I've been thinking about doing  
> something similar but am stuck with SQLObject for the moment. The  
> ability to construct complex expressions in pieces and then mix and  
> match them would be killer.
> 
> I think some operator overloading, especially the obvious cases like  
> ==, is cleaner than using only functions because it lets you order  
> things normally. But some of the operator choices are non-intuitive.  
> Personally, I would make something like 'alias' a function or class,  
> rather than overloading XOR. Not sure about ** for where.
> 
> Using // for 'in' looks really weird, too. It's too bad you can't  
> overload Python's 'in' operator. (Can you? It seems to be hard-coded  
> to iterate through an iterable and look for the value, rather than  
> calling a private method like some other builtins do.)
> 
 >>> class inplus(object):
...   def __contains__(self, thing):
...     print "Do I have a", thing, "?"
...     return True
...
 >>> x = inplus()
 >>> "Steev" in x
Do I have a Steev ?
True
 >>>
[...]

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
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