Jesús,
Thanks for the response. As I mentioned in my original message, it
seems that I can create my own replacement functions and register them
with SQLite via the provided "function" method. While I assume
that'll solve the issue when running my code, how does one go about
using views containing custom functions in 3rd party tools (in my case
"SQLite Expert Personal")? I assume the answer is " you don't, unless
the 3rd part tool somehow allows for the inclusion of user-defined
functions". I want to have my cake and eat it too... ;^)
Now, I guess that brings me back to my initial thought, which was...
With all the fancy functionality that's apparently supported by SQLite
expressions, isn't the absence of a basic mathematical "power"
operator a glaring omission? It seems to me that it is, though I
admittedly have very little experience in this domain.
Again, thanks for your input.
Jeff
----- Original Message -----
From: "Jesús López" <[EMAIL PROTECTED]>
To: <sqlite-users@sqlite.org>
Sent: Tuesday, December 19, 2006 3:08 PM
Subject: RE: [sqlite] Mathematical "power" operator?
Hi Jeff,
I'm not a Tcl user. I use C# and Robert Simpson's SQLite ADO.NET 2.0
provider to access SQLite databases.
SQLite allows you to define both scalar and aggregate user defined
functions. I think the way to approach your issue is to define a
scalar user
defined function. I don't know how to do it with Tcl, I just know how
to do
it with c#.
Regards:
Jesús López
-----Mensaje original-----
De: Jeff Godfrey [mailto:[EMAIL PROTECTED]
Enviado el: martes, 19 de diciembre de 2006 21:45
Para: sqlite-users@sqlite.org
Asunto: [sqlite] Mathematical "power" operator?
Hi All,
New to SQLite, so bear with me... ;^)
I'm trying to migrate an MS-Access database over to SQLite. I have a
VIEW
created from a SELECT statement that uses the mathematical "power"
operator
("^") for both "square root" and "squared" operations. It seems that
SQLite
doesn't support the "^" operator, so I'm trying to find the best way
around
that. I'm using SQLite from Tcl. I know that I can create my own
Tcl-based
replacements for these functions and register them with SQLite via the
"function" method, though that still seems to leave an issue.
I am using a 3rd part tool (SQLite Expert Personal) to create,
manipulate,
and generally experiment with my SQLite database. Obviously, if I
create a
Tcl-based function replacement, I can use it from within my code, but
it
won't be recognized when I open up the VIEW query that uses it via the
3rd
part tool.
Also, I can fairly easily change the query to get by without the need
for
the "squared" function, though the "square root" function would seem
to be a
bit more tricky to "code around". So, a few questions:
1. Thoughts on my specific issue with the missing mathematical
operator?
2. More generally, do people who "add" functions to SQLite just not
use 3rd
party tools to work with their data?
Thanks for any insight...
Jeff Godfrey
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