U++ framework: Coffee corner » Ineresting post from D group about Doost lib..

Home » Community » Coffee corner » Ineresting post from D group about Doost lib..

Show: Today's Messages :: Polls :: Message Navigator
E-mail to friend

Ineresting post from D group about Doost lib.. [message #15744]

Tue, 06 May 2008 21:57

unodgs
Messages: 1367
Registered: November 2005
Location: Poland

Ultimate Contributor

..seem our Sql module is not so bad Wink

Quote:

Now I am working on D version of part of U++ library, which is intended to
allow type safe database queries.
(http://www.ultimatepp.org/src$Sql$SqlExp$en-us.html)

Imagine that you put database schema into file:
http://www.dsource.org/projects/doost/browser/trunk/examples /database/TestSchema.schema

and then you use in your program typesafe versions of sql:
http://www.dsource.org/projects/doost/browser/trunk/examples /database/PackageTest.d

And simple cases work already quite well Smile

I just see problem with sql expressions. In U++ it is done like below:
Select(BOOK.AUTHOR).WHERE((BOOK.ID == 100) && (BOOK.TITLE == "Dot"));

In D it is not possible (unfortunately) and must be written like below:
Select(BOOK.AUTHOR).WHERE(land(leq(BOOK.ID, 100), leq(BOOK.TITLE, "Dot")));

I hope that maybe Walter someday will reconsider adding extended operators
overloading as addition to the current system.

Report message to a moderator

Previous Topic:	Interesing presentation about upcoming new C++ standard
Next Topic:	Qt4.4 is out, link to review at ars technica

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Tue May 05 11:05:32 GMT+2 2026

Total time taken to generate the page: 0.00626 seconds