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From "Lach, Thierry" <Thierry.L...@bbdodetroit.com>
Subject RE: Putting schema into the select clause
Date Fri, 27 Aug 2004 19:20:57 GMT

1.  Make sure the schema is optional.

2.  Make sure that the schema can be overridden at runtime.  We've got
several schema that are identical and it would be nice to be able to do
runtime selection of the schema (especially for reporting purposes)
while using a single connection (alternative would be to have multiple
identifiers in torque.properties).

3.  Suggest you use aliases.

So your sql becomes

SELECT ALIAS.COLUMN FROM SCHEMA.TABLENAME ALIAS WHERE  ALIAS.COLUMNB > 5


Or

SELECT ALIAS.COLUMN FROM SCHEMA.TABLENAME AS ALIAS WHERE  ALIAS.COLUMNB
> 5

Depending on the required syntax.

-----Original Message-----
From: Steve Toth [mailto:steveftoth@gmail.com]
Sent: Friday, August 27, 2004 2:57 PM
To: torque-user@db.apache.org
Subject: Fwd: Putting schema into the select clause


---------- Forwarded message ----------
From: Steve Toth <steveftoth@gmail.com>
Date: Fri, 27 Aug 2004 11:55:56 -0700
Subject: Re: Putting schema into the select clause
To: "mark.a.gold@accenture.com" <mark.a.gold@accenture.com>

Since I really really like the whole process and idea of Torque I want
to extend this.

I've already started to modify the generator and have added a
schema="blah" attribute to the table element since it makes sence to me
that tables should have schema information embedded rather then at the
database level.  Since that way you can have a database of multiple
schemas all grouped together and do cross schema joins.

Ok, the big problem seems to me that depending on where in the schema
clause you need to use slightly different names for the table.

Sometimes you want to use
SCHEMA.TABLENAME
and sometimes just TABLENAME.

Or do all DBs let you do stuff like
SELECT SCHEMA.TABLENAME.COLUMN FROM SCHEMA.TABLENAME WHERE
SCHEMA.TABLENAME.COLUMNB > 5 ??

If this is the case then all that really needs to be done is change the
TABLE_NAME variable to be SCHEMA.TABLENAME rather then what it is now
which is just TABLENAME

At which point adding a schema seems almost esoteric, but I think that
it should be added for the sake of completeness and correctness.  As
Schema does play a role in the resulting SQL statments that should be
generated.

Cause the api seems to use Strings all over the place as keys,
especially when doing lookups of table related data, it simple uses the
TABLE_NAME as a key to get column information. So adding schema
information would mean changing all the critera object as well. I
believe.

Any ideas, thoughts, comments?

To developers of torque, whats the easiest way to start submitting
patches?

On Fri, 27 Aug 2004 10:03:42 -0500, mark.a.gold@accenture.com


<mark.a.gold@accenture.com> wrote:
> I am in complete agreement and I have no explanation as to why it is
> omitted. Our workaround in both Oracle and DB2 (mainframe) is to use
> synonyms. Our security model requires the application log in as a
> third party so the use of private synonyms was necessary.
>
> hth, mark
>
>
>
> -----Original Message-----
> From: Steve Toth [mailto:steveftoth@gmail.com]
> Sent: Friday, August 27, 2004 10:58 AM
> To: Gold, Mark A.
> Subject: Re: Putting schema into the select clause
>
> Well that is too bad that it doesn't support it yet because it seems
> like this should be a standard feature as without schema information
> it seems like this information it will be useless to me as our (albeit
> insane) database design requires the useage of fully qualified schemas

> to work properly.
>
> How would I go about implementing this in Torque if I wanted to add
> it? Do it and then make a patch or something.  This seems like a very
> fundamental change, effecting many low level Torque classes.  Anyone
> else think that this feature needs to be added?
>
> Thanks,
> Steve Toth
>
> On Fri, 27 Aug 2004 08:01:10 -0500, mark.a.gold@accenture.com
> <mark.a.gold@accenture.com> wrote:
> > Steve, This is an ongoing issue with Torque and one I have not seen
> > a solution for. Although some solutions have been offered on this
> > list there currently seems to be no practical way to fully qualify
> > object names.
> >
> >
> >
> > -----Original Message-----
> > From: Steve Toth [mailto:steveftoth@gmail.com]
> > Sent: Thursday, August 26, 2004 7:39 PM
> > To: torque-user@db.apache.org
> > Subject: Putting schema into the select clause
> >
> > I'm trying to use Torque with Oracle and I'm not sure how to get
> > torque to put the schema before all table names during select
> > operations...
> >
> > Right now the SQL is coming out like this..
> >
> > SELECT TABLE.COL1, TABLE.COL2, TABLE.COL3 FROM TABLE
> >
> > I want it to look like this
> > SELECT TABLE.COL1, TABLE.COL2, TABLE.COL3 FROM SCHEMA.TABLE
> >
> > or
> > SELECT TABLE.COL1, TABLE.COL2, TABLE.COL3 ,TABLE2.COL1 FROM
> > SCHEMA.TABLE, SCHEMA2.TABLE2
> >
> > What do I need to do in my schema.xml file, or generation ?
> >
> > Thanks!
> >
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