N-m mapping generates blobs in ref-table

Why generates the schematool blobs in the reference-table of a n-m mapping?
I want to map an existing schema and this isn't possible with blobs. I
expected a table with the primary-keys of each class.

Abe White wrote:
Why generates the schematool blobs in the reference-table of a n-m mapping?
I want to map an existing schema and this isn't possible with blobs. I
expected a table with the primary-keys of each class.
Kodo fully supports n-m and m-m mappings. If you post your .jdo files and
describe your schema somehow we can probably help you find out where the
problem lies.Hello,
here I send you a short and useless example which contains
my two problems:
- n-m mapping generates blobs in ref-table
- multi-table inheritance mapping
This are my classes:
Class Person
String firstname
String lastname
Class Employee extends Person
long personalNumber
Collection memberOf ( TYPE Project )
Class Project
String projectname
Collection members ( TYPE Employee )
The jdo-metadata:
<?xml version="1.0"?>
<jdo>
<package name="test">
<class name="Person" identity-type="application"
objectid-class="PersonPK">
<extension vendor-name="kodo" key="table" value="DB_PERSON" />
<extension vendor-name="kodo" key="lock-column" value="VERSION_ID" />
<extension vendor-name="kodo" key="class-column" value="none" />
<field name="firstname" null-value="exception" primary-key="true">
<extension vendor-name="kodo" key="data-column"
value="FIRSTNAME_TXT" />
<extension vendor-name="kodo" key="column-length" value="50"/>
</field>
<field name="lastname" null-value="exception" primary-key="true">
<extension vendor-name="kodo" key="data-column"
value="LASTNAME_TXT" />
<extension vendor-name="kodo" key="column-length" value="50"/>
</field>
</class>


<class name="Employee" identity-type="application"
objectid-class="PersonPK" persistence-capable-superclass="test.Person">
<extension vendor-name="kodo" key="table" value="DB_EMPLOYEE" />
<extension vendor-name="kodo" key="lock-column" value="VERSION_ID" />
<extension vendor-name="kodo" key="class-column" value="none" />
<field name="personalNumber" null-value="exception">
<extension vendor-name="kodo" key="data-column"
value="PERSONAL_NUM" />
</field>
<field name="memberOf" null-value="none">
<extension vendor-name="kodo" key="inverse" value="members" />
<extension vendor-name="kodo" key="table"
value="DB_EMPLOYEE_PROJECT_REF" />
<extension vendor-name="kodo" key="projectname-data-column"
value="PROJECT_NAME" />
<extension vendor-name="kodo" key="firstname-ref-column"
value="EMPLOYEE_FIRSTNAME" />
<extension vendor-name="kodo" key="lastname-ref-column"
value="EMPLOYEE_LASTNAME" />
</field>
</class>
<class name="Project" identity-type="application"
objectid-class="ProjectPK">
<extension vendor-name="kodo" key="table" value="DB_PROJECT" />
<extension vendor-name="kodo" key="lock-column" value="VERSION_ID" />
<extension vendor-name="kodo" key="class-column" value="none" />
<field name="projectname" null-value="exception" primary-key="true">
<extension vendor-name="kodo" key="data-column" value="NAME_TXT" />
<extension vendor-name="kodo" key="column-length" value="50"/>
</field>
<field name="members" null-value="none">
<extension vendor-name="kodo" key="inverse" value="memberOf" />
<extension vendor-name="kodo" key="table"
value="DB_EMPLOYEE_PROJECT_REF" />
<extension vendor-name="kodo" key="firstname-data-column"
value="EMPLOYEE_FIRSTNAME" />
<extension vendor-name="kodo" key="lastname-data-column"
value="EMPLOYEE_LASTNAME" />
<extension vendor-name="kodo" key="projectname-ref-column"
value="PROJECT_NAME" />
</field>
</class>
</package>
</jdo>
Kodo generates this db-schema:
Table db_person
Column VERSION_ID ( Type int(11) )
Column FIRSTNAME_TXT ( Type varchar(50) ) <PrimaryKey>
Column LASTNAME_TXT ( Type varchar(50) ) <PrimaryKey>
Table db_employee
Column PERSONAL_NUM ( Type bigint(20) )
Table db_project
Column VERSION_ID ( Type int(11) )
Column NAME_TXT ( Type varchar(50) ) <PrimaryKey>
Table db_employee_project_ref
Column MEMBERSX ( Type blob )
Column MEMBEROFX ( Type blob )
I expected this:
Table db_person
Column VERSION_ID ( Type int(11) )
Column FIRSTNAME_TXT ( Type varchar(50) ) <PrimaryKey>
Column LASTNAME_TXT ( Type varchar(50) ) <PrimaryKey>
Table db_employee
Column PERSONAL_NUM ( Type bigint(20) )
**** I think Kodo needs this reference to the base-class ****
Column FIRSTNAME_TXT ( Type varchar(50) ) <ForeignKey>
Column LASTNAME_TXT ( Type varchar(50) ) <ForeignKey>
Table db_project
Column VERSION_ID ( Type int(11) )
Column NAME_TXT ( Type varchar(50) ) <PrimaryKey>
Table db_employee_project_ref
**** the mapping should use the primary keys, no blobs ****
Column EMPLOYEE_FIRSTNAME ( Type varchar(50) ) <ForeignKey>
Column EMPLOYEE_LASTNAME ( Type varchar(50) ) <ForeignKey>
Column PROJECT_NAME ( Type varchar(50) ) <ForeignKey>

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3) Create the functional index in the same new Tablespace
4) Try generating the statistics.
5) If it works then create seprate Tablespace for data and Index.
Hope it works !!
Thanks for the reply guys.

Is table maintenance generator only for custom table?

hi ,
i have doubt is table maintenance generator only for custom table?

hi swamya,
Table Maintanance Generator is used to create/change/delete table entries in a particular table.
In the production system, end-users will not be having access to transaction codes like SE11 and SE16. Developers will not be having access to many transaction codes including the above two.To view the contents of the database table, we will use SE16n in Production system. All these authorizations will be maintained by BASIS team, by creating access profiles.So in order to edit or create the contents of a database table, we should go for table maintenance generator. In real time, authorizations will be maintained in production system.
The second reason is, we can edit or create multiple entries at a time, using tablemaintenance generator.
Apart from that we have options like 'Enter conditions' in table maintenance screen SM30.
hope this helps in clearing ur doubt.
Regards
Saurabh

....how to create table maintanence generator for a z table and how to use

Hi...
3....how to create table maintanence generator for a z table and how to use that for transfering a selected records to one server to another server.
thanks and regards,
k.swaminath reddy

Hi,
Table maintanance Generator is used to manually
input values using transaction sm30.The Table Maintenance Generator is used to create table maintenance program to add, modify or delete records in the database table. This can be accessed using transaction SE54 or in SE11 using the menu Utilities->Table Maintenance Generator
<b>
Follow below steps</b>
go to se11 check table maintanance check box under
attributes tab
utilities-table maintanance Generator->
create function group and assign it under
function group input box.
also assign authorization group default &NC& .
select standard recording routine radio in table
table mainitainence generator to move table
contents to quality and production by assigning
it to request.
select maintaience type as single step.
maintainence screen as system generated numbers
this dialog box appears when you click on create
button
save and activate table
http://help.sap.com/saphelp_nw04/helpdata/en/cf/21ed2d446011d189700000e8322d00/content.htm
One step, two step in Table Maintenance Generator
Single step: Only overview screen is created i.e. the Table Maintenance Program will have only one screen where you can add, delete or edit records.
Two step: Two screens namely the overview screen and Single screen are created. The user can see the key fields in the first screen and can further go on to edit further details.
please check the link for getting information about table maintenance generator !
https://www.sdn.sap.com/irj/sdn/advancedsearch?query=use%20of%20table%20maintenance%20generator&cat=sdn_all
http://www.sapdevelopment.co.uk/tips/tips_tabmaint_tcode.htm
http://www.sap-img.com/abap/create-a-table-maintance-program-for-a-z-table.htm
Regards,
Priyanka.

N-m mapping generates blobs in ref-table

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