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Posted to user-java@ibatis.apache.org by Slava Imeshev <im...@yahoo.com> on 2006/11/13 20:40:40 UTC

IBATIS and mulit-vendor development (Oracle/Derby)

Hello everyone,

I have a question. What facilities does iBatis provide to support multi-db 
vendor development. In other words, is it possible to develop an application 
with iBatis to support seamless switch between various DB platforms (Oracle and 
Derby in my case)? 

I am asking because in general SQL dialects are somewhat different and 
resorting to a least common denominator dialect is undesirable.

Thank you.

Slava Imeshev

Re: IBATIS and mulit-vendor development (Oracle/Derby)

Posted by Slava Imeshev <im...@yahoo.com>.
Guido,

Thanks for the tip!

Slava


--- Guido García Bernardo <gg...@tid.es> wrote:

> I faced this problem, too, and I finally wrote one sql-map file per 
> dialect (oracle and mysql in my case).
> 
> In my sql-map-config.xml I put something like:
> 
> <?xml version="1.0" encoding="UTF-8" ?>
> <!DOCTYPE sqlMapConfig SYSTEM 
> "http://www.ibatis.com/dtd/sql-map-config-2.dtd">
> <sqlMapConfig>  
>     <properties resource="properties/ibatis.properties" />
>       ...
>     <sqlMap resource="my/package/dao/sql-map-tests.${sql.dialect}.xml"/>
>     <sqlMap resource="my/package/dao/sql-map-stats.${sql.dialect}.xml"/>   
> </sqlMapConfig>
> 
> With a configuration file (ibatis.properties) with an entry:
> sql.dialect=oracle
> 
> That doesn't really solve your problem but it helps :)
> Regards
> 
> Slava Imeshev escribió:
> > Hello everyone,
> >
> > I have a question. What facilities does iBatis provide to support multi-db 
> > vendor development. In other words, is it possible to develop an application 
> > with iBatis to support seamless switch between various DB platforms (Oracle and 
> > Derby in my case)? 
> >
> > I am asking because in general SQL dialects are somewhat different and 
> > resorting to a least common denominator dialect is undesirable.
> >
> > Thank you.
> >
> > Slava Imeshev
> >
> >
> >   
> 
> 
> -- 
> Guido García Bernardo
> 
> Tfn. +34 983 54 89 08
> ITDEUSTO - Valladolid
> 
> 
>

Re: IBATIS and mulit-vendor development (Oracle/Derby)

Posted by Guido García Bernardo <gg...@tid.es>.
I faced this problem, too, and I finally wrote one sql-map file per 
dialect (oracle and mysql in my case).

In my sql-map-config.xml I put something like:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE sqlMapConfig SYSTEM 
"http://www.ibatis.com/dtd/sql-map-config-2.dtd">
<sqlMapConfig>  
    <properties resource="properties/ibatis.properties" />
      ...
    <sqlMap resource="my/package/dao/sql-map-tests.${sql.dialect}.xml"/>
    <sqlMap resource="my/package/dao/sql-map-stats.${sql.dialect}.xml"/>   
</sqlMapConfig>

With a configuration file (ibatis.properties) with an entry:
sql.dialect=oracle

That doesn't really solve your problem but it helps :)
Regards

Slava Imeshev escribió:
> Hello everyone,
>
> I have a question. What facilities does iBatis provide to support multi-db 
> vendor development. In other words, is it possible to develop an application 
> with iBatis to support seamless switch between various DB platforms (Oracle and 
> Derby in my case)? 
>
> I am asking because in general SQL dialects are somewhat different and 
> resorting to a least common denominator dialect is undesirable.
>
> Thank you.
>
> Slava Imeshev
>
>
>   


-- 
Guido García Bernardo

Tfn. +34 983 54 89 08
ITDEUSTO - Valladolid