Re: Still no luck with this query

[Jakob Braeuchi]

hi john,

[EMAIL PROTECTED] wrote:

Sorry for the confusion.  I tried to abbreviate to make it easier to read.

In the end, I want to do this query:

        SELECT r.msid, r.rtitle, r.brief
        FROM rstep1 r, serviceinterest si
        WHERE ((si.targetmsid = 101)
              AND (si.interestmsid = r.msid))


Based on these two tables and the repository I gave previously:
        CREATE TABLE rstep1 (
          msid BIGINT(20) NOT NULL,
          rtitle VARCHAR(70) NOT NULL,
          brief VARCHAR(255) NULL,
          PRIMARY KEY(msid),
        )
        
        CREATE TABLE serviceinterest (
          targetmsid BIGINT(20) UNSIGNED NOT NULL,
          interestmsid BIGINT(20) UNSIGNED NOT NULL,
          targetmid BIGINT(20) UNSIGNED NOT NULL,
          interestmid BIGINT(20) UNSIGNED NOT NULL,
          PRIMARY KEY(targetmsid, interestmsid)
        )



si.targetmsid=101, the subquery and one part of the serviceinterest primary key, should generate a list of serviceinterests.

I want to return the one-to-one associated rstep1 (RServiceInterestVO) for each of the those serviceinterests that were generated.

why don't you define a 1:1 relationship pointing from ServiceInterest to 
RServiceInterestVO. imo the relationship pointing in the other direction 
(RServiceInterestVO to ServiceInterest) should be a 1:n relationship.

<class-descriptor class="com.model.services.interest.RServiceInterestVO"
        table="rstep1">
	<field-descriptor
	  name="memberServiceId"
          column="msid"
          jdbc-type="BIGINT"
	  primarykey="true"
	/>
...
        <collection-descriptor
             name="serviceInterests"            						 
class-ref="com.model.memberservice.ServiceInterestVO"
             auto-retrieve="true"
             auto-update="false"
             auto-delete="false">
             <inverse-foreignkey field-ref="targetMemberServiceId"/>
       </collection-descriptor>
</class-descriptor>

<class-descriptor class="com.model.memberservice.ServiceInterestVO" 			 
table="serviceinterest">

	<field-descriptor
	   name="targetMemberServiceId"
           column="targetmsid"
           jdbc-type="BIGINT"
           primarykey="true"
        />
	<field-descriptor
           name="interestMemberServiceId"
           column="interestmsid"
           jdbc-type="BIGINT"
           primarykey="true"
        />
...
        <reference-descriptor
             name="targetService"            							 
class-ref="com.model.memberservice.RServiceInterestVO"
             auto-retrieve="true"
             auto-update="false"
             auto-delete="false">
            <foreignkey field-ref="targetMemberServiceId"/>
       </reference-descriptor>

</class-descriptor>

then it should be possible to query:

Criteria crit = new Criteria();
crit.addEqualTo("serviceInterests.targetMemberServiceId", 101);
Query query = new QueryByCriteria(RServiceInterestVO.class, crit);
broker.getCollectionByQuery(query);
jakob

crit.addEqualTo("serviceInterest.targetMemberServiceId", 101);
crit.addEqualToField("serviceInterest.interestMemberServiceId", "memberServiceId");
Yes I am trying to join with this addEqualToField, but notice onto the 2nd half of the primary key.

I know my mapping is wrong, bit I don't know how to give a correct mapping for this problem.   That is where my problem lies.  In every other query I have done, there was a simple one to one primary key mapping that INNER JOIN worked well on.  Here, the primary key is not fully used in the subquery and actually prevents this from working.

Hense I am asking for a new idea or direction.   I don't know how to proceed.   I am trying to learn.

JohnE



----- Original Message -----
From: Jakob Braeuchi <[EMAIL PROTECTED]>
Date: Thursday, March 11, 2004 1:17 pm
Subject: Re: Still no luck with this query

hi john,

you have a 1:1-relationship pointing from RServiceInterestVO to 
ServiceInterestVO, is this correct ? a similar relationship can be 
found in the 
samples (ProductGroup to Article).
the pk of RServiceInterestVO is used as fk to ServiceInterestVO in 
your 
repository. but the comment says it's wrong.

according to the repository each class has a single pk; but the 
table 
serviceinterest uses a combined pk ? and i cannot find a create 
table for 
rstep1. pk definition in create table and the repository must 
match !

crit.addEqualTo("serviceInterest.targetMemberServiceId", jMsid);
crit.addEqualToField("serviceInterest.interestMemberServiceId", 
"memberServiceId");
dou you try to force a join with addEqualToField ?

jakob

[EMAIL PROTECTED] wrote:


Thank you for responding Jakob.

Again this is the query I would like:

       SELECT r.msid, r.rtitle, r.brief
       FROM rstep1 r, serviceinterest si
       WHERE ((si.targetmsid = 101)
             AND (si.interestmsid = r.msid))
Below was my first of many attempts to solve this problem, but 
it wouldn't work right using RC4 because it tries to form the 
INNER JOIN from the memberServiceId to the first of two part 
primary key in the second table. I had not tried this particular 
method in RC5, but tried other methods using RC5.  

I know below is wrong, but I don't know the right strategy for 
what I need.   I can't seem to figure out how to handle subqueries 
not off the primary key.

I want a collection of these back:

<class-descriptor 
class="com.model.services.interest.RServiceInterestVO" table="rstep1">

   <field-descriptor
       name="memberServiceId"
       column="msid"
       jdbc-type="BIGINT"
       primarykey="true"
   />
   <field-descriptor
       name="rTitle"
       column="rtitle"
       jdbc-type="VARCHAR"
   />
   <field-descriptor
       name="brief"
       column="brief"
       jdbc-type="VARCHAR"
   />
 

   <!-- This would be wrong, as I don't want to go off of 
ServicenterestVO's>                   primary key, but use this 
object in a subquery.  -->

   <reference-descriptor
           name="serviceInterest"
           class-ref="com.model.memberservice.ServiceInterestVO"
           auto-retrieve="true"
           auto-update="false"
           auto-delete="false">
       <foreignkey field-ref="memberServiceId"/>
   </reference-descriptor>
</class-descriptor>





This is what the subquery table looks like:

<class-descriptor 
class="com.model.memberservice.ServiceInterestVO" table="serviceinterest">

        <field-descriptor
       name="targetMemberServiceId"
       column="targetmsid"
       jdbc-type="BIGINT"
       primarykey="true"
   />
        <field-descriptor
       name="targetMemberId"
       column="targetmid"
       jdbc-type="BIGINT"
       indexed="true"
   />
        <field-descriptor
       name="interestMemberServiceId"
       column="interestmsid"
       jdbc-type="BIGINT"
       primarykey="true"
   />
        <field-descriptor
       name="interestMemberId"
       column="interestmid"
       jdbc-type="BIGINT"
       indexed="true"
   />
</class-descriptor>




This failed as well as other things:
       crit.addEqualTo("serviceInterest.targetMemberServiceId", 
jMsid);>         
crit.addEqualToField("serviceInterest.interestMemberServiceId", "memberServiceId");

       Collection result = 
GenericDAO.getInstance().findCollectionByCriteria(objectClass, crit);







----- Original Message -----
From: Jakob Braeuchi <[EMAIL PROTECTED]>
Date: Wednesday, March 10, 2004 1:25 pm
Subject: Re: Still no luck with this query


hi john,

you should at least provide some information about the 
repository 

you use.

jakob

[EMAIL PROTECTED] wrote:



Dear all,

Maybe I wasn't asking my question well because it had not 
gained 

a response in about a week.  Maybe I am missing something very 
simple, but I am still pretty new to any kinda OR-mappings and I 
have nobody who can help but this list.  Rather then try to 
explain the 4 different ways I tried to solve it again, how 
might 

people with better understanding.   I can not find an answer to 
this in the mailing lists nor in the docs.  If you have a 
reference, please give me a pointer.


I am trying to get a listing of all of the services 
('aservice') 

that are interested in my particular service (having id 101).


// The query I would like agressively abreviated:
SELECT r.msid, r.rtitle, r.brief

FROM aservice r, serviceinterest si

WHERE ((si.targetmsid = 101)
    AND (si.interestmsid = r.msid))
// I want a collection of these returned
CREATE TABLE aservice (
msid BIGINT(20) NOT NULL,
rtitle VARCHAR(70) NOT NULL,
brief VARCHAR(255) NULL,
PRIMARY KEY(msid),
)
// Note a duo key that should not be referenced in whole by 
aservice:> CREATE TABLE serviceinterest (


targetmsid BIGINT(20) UNSIGNED NOT NULL,
interestmsid BIGINT(20) UNSIGNED NOT NULL,
PRIMARY KEY(targetmsid, interestmsid)
)
I have been having problems because of foreign keys and how 
INNER JOIN seems to work with this query.


Thank you if you can.  I will gladly post more detailed 
information or email the code as need be.


JohnE
[EMAIL PROTECTED]




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