Re: [eclipse-clp-users] database interface

From: Kish Shen <kisshen_at_...5...>
Date: Wed, 29 Oct 2008 13:03:30 +0000
Hi Carlo,

I am not sure I completely understand the background to your question -- 
did you find the documentation for lib(dbi) in the manuals? There is a 
chapter on it in the Embedding and Interfacing manual (with ECLiPSe 6.0; 
it used to be in the Constraints Library manual in 5.10), which should 
tell you to do what you are asking:

http://www.eclipse-clp.org/doc/embedding/embroot059.html

Did you not find this documentation (it may be a little hard to locate), 
or did you have problems with the manual description?

To do what you want, you would issue the SQL query using 
session_sql_query/4, and then use cursor_next_tuple/2 to retrieve your 
results -- this returns the tuples that matches your query one tuple at 
a time, which seems to be what you want.

Cheers,

Kish

Carlo Matteo Scalzo wrote:
> Hi everybody, i'm new to this mailing list.
> 
> I just discovered the eclipse database interface (dbi).
> 
> I'd like to use this interface to define a predicate that enumerates on
> backtracking all the tuples returned by a SQL query.
> 
> Suppose i have a mysql database composed by a single table Student(name,
> age),  where 'name' is a string and 'age' is an integer.
> 
> I'd like to have a predicate student(Name, Age) that enumerates on
> backtracking all the tuples returned by the SQL query "select * from
> Student".
> 
> Can someone please help me ?
> 
> Thanks in advance.
> 
> 
> 
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Received on Wed Oct 29 2008 - 13:03:37 CET

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