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Posted to dev@tuscany.apache.org by Adriano Crestani <ad...@gmail.com> on 2007/04/07 22:59:42 UTC
[DAS Java] created SDO graph doubt 2
Another doubt:
I have the following tables on my database:
create table B (
ID INTEGER NOT NULL PRIMARY KEY
);
create table A (
ID INTEGER NOT NULL PRIMARY KEY,
B_ID INTEGER,
FOREIGN KEY (B_ID) REFERENCES B(ID)
);
OK, then I was analyzing the generated sdo graph when I execute the query
"select * from A, B;", I got something like this:
Graph1:
http://cwiki.apache.org/confluence/download/attachments/45093/das_graph.JPG
I understand the column B_ID would be considered only an integer column when
of table A when there is no B table returned on the query. However, the B
table is also returned on the query and as the B_ID column is a FK to the
table B, shouldn't the graph be like this?:
Graph2: http://cwiki.apache.org/confluence/download/attachments/45093/das+
graph+as+I+suppose+it+shoud+be.JPG
<http://cwiki.apache.org/confluence/download/attachments/45093/das+graph+as+I+suppose+it+shoud+be.JPG>
This way I think the data returned by the query would be better represented
on the graph. Maybe there is a reason for the graph to be generated as
Graph1 instead of Graph2.
What do you say guys?
Adriano Crestani
Re: [DAS Java] created SDO graph doubt 2
Posted by Kevin Williams <ke...@qwest.net>.
I responded before this was moved to "... graph doubt 2". See my answer
there.
Adriano Crestani wrote:
> Another doubt:
>
> I have the following tables on my database:
>
> create table B (
> ID INTEGER NOT NULL PRIMARY KEY
> );
>
> create table A (
> ID INTEGER NOT NULL PRIMARY KEY,
> B_ID INTEGER,
> FOREIGN KEY (B_ID) REFERENCES B(ID)
> );
>
> OK, then I was analyzing the generated sdo graph when I execute the query
> "select * from A, B;", I got something like this:
>
> Graph1:
> http://cwiki.apache.org/confluence/download/attachments/45093/das_graph.JPG
>
>
> I understand the column B_ID would be considered only an integer
> column when
> of table A when there is no B table returned on the query. However, the B
> table is also returned on the query and as the B_ID column is a FK to the
> table B, shouldn't the graph be like this?:
>
> Graph2:
> http://cwiki.apache.org/confluence/download/attachments/45093/das+
> graph+as+I+suppose+it+shoud+be.JPG
> <http://cwiki.apache.org/confluence/download/attachments/45093/das+graph+as+I+suppose+it+shoud+be.JPG>
>
>
> This way I think the data returned by the query would be better
> represented
> on the graph. Maybe there is a reason for the graph to be generated as
> Graph1 instead of Graph2.
> What do you say guys?
>
> Adriano Crestani
>
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Re: [DAS Java] created SDO graph doubt 2
Posted by Luciano Resende <lu...@gmail.com>.
Interesting, I have a same scenario on a shoppingcart application I am
working on, and it does not work if I don't have the relationship defined on
my das config.
On 4/8/07, Brent Daniel <br...@gmail.com> wrote:
>
> This is implemented. A column named {x}_ID where {x} is the primary
> key table name is assumed to be a foreign key to a column named ID in
> the PK table. Examples are in ImpliedRelationshipTests. I'm not sure
> why it isn't working for you here, though.
>
> Brent
>
>
> On 4/7/07, Adriano Crestani <ad...@gmail.com> wrote:
> > Yes, you got the point Luciano...so the reason is that it's not yet
> > implemented on Convetion Over Configuration ; ).
> >
> > Thanks
> >
> > Adriano Crestani
> >
> > On 4/7/07, Luciano Resende <lu...@gmail.com> wrote:
> > >
> > > Have you setup the relationship on your DAS config file ? Should look
> > > something like the example below :
> > >
> > > <Relationship name="BDATA" primaryKeyTable="A" foreignKeyTable="B"
> > > many="true">
> > > <KeyPair primaryKeyColumn="ID" foreignKeyColumn="B_ID"/>
> > > </Relationship>
> > >
> > > See more info around relationships on [1] and [2].
> > >
> > > Now, if what you want is to have the relationship done via Convention
> over
> > > Configuration, I don't think we have that implemented, our set of
> > > implemented conventions are limited at the moment.
> > >
> > > [1] - http://wiki.apache.org/ws/ForeignKeyRepresentationAndManagement
> > > [2] - http://wiki.apache.org/ws/WorkingWithRelationships
> > >
> > >
> > > On 4/7/07, Adriano Crestani <ad...@gmail.com> wrote:
> > > >
> > > > Another doubt:
> > > >
> > > > I have the following tables on my database:
> > > >
> > > > create table B (
> > > > ID INTEGER NOT NULL PRIMARY KEY
> > > > );
> > > >
> > > > create table A (
> > > > ID INTEGER NOT NULL PRIMARY KEY,
> > > > B_ID INTEGER,
> > > > FOREIGN KEY (B_ID) REFERENCES B(ID)
> > > > );
> > > >
> > > > OK, then I was analyzing the generated sdo graph when I execute the
> > > query
> > > > "select * from A, B;", I got something like this:
> > > >
> > > > Graph1:
> > > >
> > > >
> > >
> http://cwiki.apache.org/confluence/download/attachments/45093/das_graph.JPG
> > > >
> > > > I understand the column B_ID would be considered only an integer
> column
> > > > when
> > > > of table A when there is no B table returned on the query. However,
> the
> > > B
> > > > table is also returned on the query and as the B_ID column is a FK
> to
> > > the
> > > > table B, shouldn't the graph be like this?:
> > > >
> > > > Graph2:
> > > http://cwiki.apache.org/confluence/download/attachments/45093/das+
> > > > graph+as+I+suppose+it+shoud+be.JPG
> > > > <
> > > >
> > >
> http://cwiki.apache.org/confluence/download/attachments/45093/das+graph+as+I+suppose+it+shoud+be.JPG
> > > > >
> > > >
> > > > This way I think the data returned by the query would be better
> > > > represented
> > > > on the graph. Maybe there is a reason for the graph to be generated
> as
> > > > Graph1 instead of Graph2.
> > > > What do you say guys?
> > > >
> > > > Adriano Crestani
> > > >
> > >
> > >
> > >
> > > --
> > > Luciano Resende
> > > http://people.apache.org/~lresende
> > >
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
>
>
--
Luciano Resende
http://people.apache.org/~lresende
Re: [DAS Java] created SDO graph doubt 2
Posted by Brent Daniel <br...@gmail.com>.
This is implemented. A column named {x}_ID where {x} is the primary
key table name is assumed to be a foreign key to a column named ID in
the PK table. Examples are in ImpliedRelationshipTests. I'm not sure
why it isn't working for you here, though.
Brent
On 4/7/07, Adriano Crestani <ad...@gmail.com> wrote:
> Yes, you got the point Luciano...so the reason is that it's not yet
> implemented on Convetion Over Configuration ; ).
>
> Thanks
>
> Adriano Crestani
>
> On 4/7/07, Luciano Resende <lu...@gmail.com> wrote:
> >
> > Have you setup the relationship on your DAS config file ? Should look
> > something like the example below :
> >
> > <Relationship name="BDATA" primaryKeyTable="A" foreignKeyTable="B"
> > many="true">
> > <KeyPair primaryKeyColumn="ID" foreignKeyColumn="B_ID"/>
> > </Relationship>
> >
> > See more info around relationships on [1] and [2].
> >
> > Now, if what you want is to have the relationship done via Convention over
> > Configuration, I don't think we have that implemented, our set of
> > implemented conventions are limited at the moment.
> >
> > [1] - http://wiki.apache.org/ws/ForeignKeyRepresentationAndManagement
> > [2] - http://wiki.apache.org/ws/WorkingWithRelationships
> >
> >
> > On 4/7/07, Adriano Crestani <ad...@gmail.com> wrote:
> > >
> > > Another doubt:
> > >
> > > I have the following tables on my database:
> > >
> > > create table B (
> > > ID INTEGER NOT NULL PRIMARY KEY
> > > );
> > >
> > > create table A (
> > > ID INTEGER NOT NULL PRIMARY KEY,
> > > B_ID INTEGER,
> > > FOREIGN KEY (B_ID) REFERENCES B(ID)
> > > );
> > >
> > > OK, then I was analyzing the generated sdo graph when I execute the
> > query
> > > "select * from A, B;", I got something like this:
> > >
> > > Graph1:
> > >
> > >
> > http://cwiki.apache.org/confluence/download/attachments/45093/das_graph.JPG
> > >
> > > I understand the column B_ID would be considered only an integer column
> > > when
> > > of table A when there is no B table returned on the query. However, the
> > B
> > > table is also returned on the query and as the B_ID column is a FK to
> > the
> > > table B, shouldn't the graph be like this?:
> > >
> > > Graph2:
> > http://cwiki.apache.org/confluence/download/attachments/45093/das+
> > > graph+as+I+suppose+it+shoud+be.JPG
> > > <
> > >
> > http://cwiki.apache.org/confluence/download/attachments/45093/das+graph+as+I+suppose+it+shoud+be.JPG
> > > >
> > >
> > > This way I think the data returned by the query would be better
> > > represented
> > > on the graph. Maybe there is a reason for the graph to be generated as
> > > Graph1 instead of Graph2.
> > > What do you say guys?
> > >
> > > Adriano Crestani
> > >
> >
> >
> >
> > --
> > Luciano Resende
> > http://people.apache.org/~lresende
> >
>
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Re: [DAS Java] created SDO graph doubt 2
Posted by Adriano Crestani <ad...@gmail.com>.
Yes, you got the point Luciano...so the reason is that it's not yet
implemented on Convetion Over Configuration ; ).
Thanks
Adriano Crestani
On 4/7/07, Luciano Resende <lu...@gmail.com> wrote:
>
> Have you setup the relationship on your DAS config file ? Should look
> something like the example below :
>
> <Relationship name="BDATA" primaryKeyTable="A" foreignKeyTable="B"
> many="true">
> <KeyPair primaryKeyColumn="ID" foreignKeyColumn="B_ID"/>
> </Relationship>
>
> See more info around relationships on [1] and [2].
>
> Now, if what you want is to have the relationship done via Convention over
> Configuration, I don't think we have that implemented, our set of
> implemented conventions are limited at the moment.
>
> [1] - http://wiki.apache.org/ws/ForeignKeyRepresentationAndManagement
> [2] - http://wiki.apache.org/ws/WorkingWithRelationships
>
>
> On 4/7/07, Adriano Crestani <ad...@gmail.com> wrote:
> >
> > Another doubt:
> >
> > I have the following tables on my database:
> >
> > create table B (
> > ID INTEGER NOT NULL PRIMARY KEY
> > );
> >
> > create table A (
> > ID INTEGER NOT NULL PRIMARY KEY,
> > B_ID INTEGER,
> > FOREIGN KEY (B_ID) REFERENCES B(ID)
> > );
> >
> > OK, then I was analyzing the generated sdo graph when I execute the
> query
> > "select * from A, B;", I got something like this:
> >
> > Graph1:
> >
> >
> http://cwiki.apache.org/confluence/download/attachments/45093/das_graph.JPG
> >
> > I understand the column B_ID would be considered only an integer column
> > when
> > of table A when there is no B table returned on the query. However, the
> B
> > table is also returned on the query and as the B_ID column is a FK to
> the
> > table B, shouldn't the graph be like this?:
> >
> > Graph2:
> http://cwiki.apache.org/confluence/download/attachments/45093/das+
> > graph+as+I+suppose+it+shoud+be.JPG
> > <
> >
> http://cwiki.apache.org/confluence/download/attachments/45093/das+graph+as+I+suppose+it+shoud+be.JPG
> > >
> >
> > This way I think the data returned by the query would be better
> > represented
> > on the graph. Maybe there is a reason for the graph to be generated as
> > Graph1 instead of Graph2.
> > What do you say guys?
> >
> > Adriano Crestani
> >
>
>
>
> --
> Luciano Resende
> http://people.apache.org/~lresende
>
Re: [DAS Java] created SDO graph doubt 2
Posted by Kevin Williams <ke...@qwest.net>.
It would be possible to support what you are asking but then the DAS
runtime would have to process and relate all the returned rows. I think
this work is better suited to the Database which is optimized for to do
this as part of a "join".
--Kevin
Adriano Crestani wrote:
>> Hello Adriano,
>> To return a graph of related elements, the RDB DAS depends on the user
>> providing a Query that expresses the relationship between the elements.
>> This is most often done by providing a query that includes a join. See
>> the "relationship" examples in the DAS test suite.
>> Thanks,
>> --Kevin
>
>
> But shouldn't be created a relationship between two or more tables on the
> graph even if the query has no join? For example, if I make a query that
> return all the database data: "select * from Table1, Table2...., TableN".
>
> Adriano Crestani
>
> On 4/9/07, Kevin Williams <ke...@qwest.net> wrote:
>
>>
>> Hi Guys,
>>
>> The foreign key convention is supported and is demonstrated in this
>> test: ImpliedRelationshipTests.testAddNewOrder()
>>
>> The convention is lightly documented here:
>> http://wiki.apache.org/ws/ConventionOverConfiguration
>>
>> Thanks,
>>
>> --Kevin
>>
>>
>>
>> Luciano Resende wrote:
>>
>> > Have you setup the relationship on your DAS config file ? Should look
>> > something like the example below :
>> >
>> > <Relationship name="BDATA" primaryKeyTable="A" foreignKeyTable="B"
>> > many="true">
>> > <KeyPair primaryKeyColumn="ID" foreignKeyColumn="B_ID"/>
>> > </Relationship>
>> >
>> > See more info around relationships on [1] and [2].
>> >
>> > Now, if what you want is to have the relationship done via Convention
>> > over
>> > Configuration, I don't think we have that implemented, our set of
>> > implemented conventions are limited at the moment.
>> >
>> > [1] - http://wiki.apache.org/ws/ForeignKeyRepresentationAndManagement
>> > [2] - http://wiki.apache.org/ws/WorkingWithRelationships
>> >
>> >
>> > On 4/7/07, Adriano Crestani <ad...@gmail.com> wrote:
>> >
>> >>
>> >> Another doubt:
>> >>
>> >> I have the following tables on my database:
>> >>
>> >> create table B (
>> >> ID INTEGER NOT NULL PRIMARY KEY
>> >> );
>> >>
>> >> create table A (
>> >> ID INTEGER NOT NULL PRIMARY KEY,
>> >> B_ID INTEGER,
>> >> FOREIGN KEY (B_ID) REFERENCES B(ID)
>> >> );
>> >>
>> >> OK, then I was analyzing the generated sdo graph when I execute the
>> >> query
>> >> "select * from A, B;", I got something like this:
>> >>
>> >> Graph1:
>> >>
>> >>
>> http://cwiki.apache.org/confluence/download/attachments/45093/das_graph.JPG
>>
>> >>
>> >>
>> >> I understand the column B_ID would be considered only an integer
>> column
>> >> when
>> >> of table A when there is no B table returned on the query. However,
>> >> the B
>> >> table is also returned on the query and as the B_ID column is a FK to
>> >> the
>> >> table B, shouldn't the graph be like this?:
>> >>
>> >> Graph2:
>> >> http://cwiki.apache.org/confluence/download/attachments/45093/das+
>> >> graph+as+I+suppose+it+shoud+be.JPG
>> >> <
>> >>
>> http://cwiki.apache.org/confluence/download/attachments/45093/das+graph+as+I+suppose+it+shoud+be.JPG
>>
>> >>
>> >> >
>> >>
>> >> This way I think the data returned by the query would be better
>> >> represented
>> >> on the graph. Maybe there is a reason for the graph to be
>> generated as
>> >> Graph1 instead of Graph2.
>> >> What do you say guys?
>> >>
>> >> Adriano Crestani
>> >>
>> >
>> >
>> >
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
>> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
>>
>>
>
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Re: [DAS Java] created SDO graph doubt 2
Posted by Adriano Crestani <ad...@gmail.com>.
>Hello Adriano,
>To return a graph of related elements, the RDB DAS depends on the user
>providing a Query that expresses the relationship between the elements.
>This is most often done by providing a query that includes a join. See
>the "relationship" examples in the DAS test suite.
>Thanks,
>--Kevin
But shouldn't be created a relationship between two or more tables on the
graph even if the query has no join? For example, if I make a query that
return all the database data: "select * from Table1, Table2...., TableN".
Adriano Crestani
On 4/9/07, Kevin Williams <ke...@qwest.net> wrote:
>
> Hi Guys,
>
> The foreign key convention is supported and is demonstrated in this
> test: ImpliedRelationshipTests.testAddNewOrder()
>
> The convention is lightly documented here:
> http://wiki.apache.org/ws/ConventionOverConfiguration
>
> Thanks,
>
> --Kevin
>
>
>
> Luciano Resende wrote:
>
> > Have you setup the relationship on your DAS config file ? Should look
> > something like the example below :
> >
> > <Relationship name="BDATA" primaryKeyTable="A" foreignKeyTable="B"
> > many="true">
> > <KeyPair primaryKeyColumn="ID" foreignKeyColumn="B_ID"/>
> > </Relationship>
> >
> > See more info around relationships on [1] and [2].
> >
> > Now, if what you want is to have the relationship done via Convention
> > over
> > Configuration, I don't think we have that implemented, our set of
> > implemented conventions are limited at the moment.
> >
> > [1] - http://wiki.apache.org/ws/ForeignKeyRepresentationAndManagement
> > [2] - http://wiki.apache.org/ws/WorkingWithRelationships
> >
> >
> > On 4/7/07, Adriano Crestani <ad...@gmail.com> wrote:
> >
> >>
> >> Another doubt:
> >>
> >> I have the following tables on my database:
> >>
> >> create table B (
> >> ID INTEGER NOT NULL PRIMARY KEY
> >> );
> >>
> >> create table A (
> >> ID INTEGER NOT NULL PRIMARY KEY,
> >> B_ID INTEGER,
> >> FOREIGN KEY (B_ID) REFERENCES B(ID)
> >> );
> >>
> >> OK, then I was analyzing the generated sdo graph when I execute the
> >> query
> >> "select * from A, B;", I got something like this:
> >>
> >> Graph1:
> >>
> >>
> http://cwiki.apache.org/confluence/download/attachments/45093/das_graph.JPG
> >>
> >>
> >> I understand the column B_ID would be considered only an integer column
> >> when
> >> of table A when there is no B table returned on the query. However,
> >> the B
> >> table is also returned on the query and as the B_ID column is a FK to
> >> the
> >> table B, shouldn't the graph be like this?:
> >>
> >> Graph2:
> >> http://cwiki.apache.org/confluence/download/attachments/45093/das+
> >> graph+as+I+suppose+it+shoud+be.JPG
> >> <
> >>
> http://cwiki.apache.org/confluence/download/attachments/45093/das+graph+as+I+suppose+it+shoud+be.JPG
> >>
> >> >
> >>
> >> This way I think the data returned by the query would be better
> >> represented
> >> on the graph. Maybe there is a reason for the graph to be generated as
> >> Graph1 instead of Graph2.
> >> What do you say guys?
> >>
> >> Adriano Crestani
> >>
> >
> >
> >
>
>
>
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> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
>
>
Re: [DAS Java] created SDO graph doubt 2
Posted by Kevin Williams <ke...@qwest.net>.
Hi Guys,
The foreign key convention is supported and is demonstrated in this
test: ImpliedRelationshipTests.testAddNewOrder()
The convention is lightly documented here:
http://wiki.apache.org/ws/ConventionOverConfiguration
Thanks,
--Kevin
Luciano Resende wrote:
> Have you setup the relationship on your DAS config file ? Should look
> something like the example below :
>
> <Relationship name="BDATA" primaryKeyTable="A" foreignKeyTable="B"
> many="true">
> <KeyPair primaryKeyColumn="ID" foreignKeyColumn="B_ID"/>
> </Relationship>
>
> See more info around relationships on [1] and [2].
>
> Now, if what you want is to have the relationship done via Convention
> over
> Configuration, I don't think we have that implemented, our set of
> implemented conventions are limited at the moment.
>
> [1] - http://wiki.apache.org/ws/ForeignKeyRepresentationAndManagement
> [2] - http://wiki.apache.org/ws/WorkingWithRelationships
>
>
> On 4/7/07, Adriano Crestani <ad...@gmail.com> wrote:
>
>>
>> Another doubt:
>>
>> I have the following tables on my database:
>>
>> create table B (
>> ID INTEGER NOT NULL PRIMARY KEY
>> );
>>
>> create table A (
>> ID INTEGER NOT NULL PRIMARY KEY,
>> B_ID INTEGER,
>> FOREIGN KEY (B_ID) REFERENCES B(ID)
>> );
>>
>> OK, then I was analyzing the generated sdo graph when I execute the
>> query
>> "select * from A, B;", I got something like this:
>>
>> Graph1:
>>
>> http://cwiki.apache.org/confluence/download/attachments/45093/das_graph.JPG
>>
>>
>> I understand the column B_ID would be considered only an integer column
>> when
>> of table A when there is no B table returned on the query. However,
>> the B
>> table is also returned on the query and as the B_ID column is a FK to
>> the
>> table B, shouldn't the graph be like this?:
>>
>> Graph2:
>> http://cwiki.apache.org/confluence/download/attachments/45093/das+
>> graph+as+I+suppose+it+shoud+be.JPG
>> <
>> http://cwiki.apache.org/confluence/download/attachments/45093/das+graph+as+I+suppose+it+shoud+be.JPG
>>
>> >
>>
>> This way I think the data returned by the query would be better
>> represented
>> on the graph. Maybe there is a reason for the graph to be generated as
>> Graph1 instead of Graph2.
>> What do you say guys?
>>
>> Adriano Crestani
>>
>
>
>
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Re: [DAS Java] created SDO graph doubt 2
Posted by Luciano Resende <lu...@gmail.com>.
Have you setup the relationship on your DAS config file ? Should look
something like the example below :
<Relationship name="BDATA" primaryKeyTable="A" foreignKeyTable="B"
many="true">
<KeyPair primaryKeyColumn="ID" foreignKeyColumn="B_ID"/>
</Relationship>
See more info around relationships on [1] and [2].
Now, if what you want is to have the relationship done via Convention over
Configuration, I don't think we have that implemented, our set of
implemented conventions are limited at the moment.
[1] - http://wiki.apache.org/ws/ForeignKeyRepresentationAndManagement
[2] - http://wiki.apache.org/ws/WorkingWithRelationships
On 4/7/07, Adriano Crestani <ad...@gmail.com> wrote:
>
> Another doubt:
>
> I have the following tables on my database:
>
> create table B (
> ID INTEGER NOT NULL PRIMARY KEY
> );
>
> create table A (
> ID INTEGER NOT NULL PRIMARY KEY,
> B_ID INTEGER,
> FOREIGN KEY (B_ID) REFERENCES B(ID)
> );
>
> OK, then I was analyzing the generated sdo graph when I execute the query
> "select * from A, B;", I got something like this:
>
> Graph1:
>
> http://cwiki.apache.org/confluence/download/attachments/45093/das_graph.JPG
>
> I understand the column B_ID would be considered only an integer column
> when
> of table A when there is no B table returned on the query. However, the B
> table is also returned on the query and as the B_ID column is a FK to the
> table B, shouldn't the graph be like this?:
>
> Graph2: http://cwiki.apache.org/confluence/download/attachments/45093/das+
> graph+as+I+suppose+it+shoud+be.JPG
> <
> http://cwiki.apache.org/confluence/download/attachments/45093/das+graph+as+I+suppose+it+shoud+be.JPG
> >
>
> This way I think the data returned by the query would be better
> represented
> on the graph. Maybe there is a reason for the graph to be generated as
> Graph1 instead of Graph2.
> What do you say guys?
>
> Adriano Crestani
>
--
Luciano Resende
http://people.apache.org/~lresende