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From "Aaron Mulder" <ammul...@alumni.princeton.edu>
Subject Re: Question about CMP Entity Bean key generation
Date Wed, 22 Feb 2006 20:13:10 GMT
It executes the SQL separately to get the ID, and then does an insert
with that ID.  The example used PostgreSQL syntax.

Thanks,
    Aaron

On 2/22/06, David Carew <dccarew@gmail.com> wrote:
> I'm trying to do this in DB2 . I found an example of a deployment plan in
> Aaron Mulder's book but I don't recognize  this particular SQL dialect.
>
>  <key-generator> <sql-generator> <sql>select nextval('person_seq')</sql>
> <return-type>java.lang.Integer</return-type> </sql-generator>
>
>
> Will the container use the contents of <sql> in the Values clause of an
> INSERT statement like this
>
> e.g. insert into foo values (contents of <sql>,....)
>
> or will it execute the contents of <sql> as a separate statement and expect
> it to return a single value of the appropriate type ? In DB2 this would be
>
>  select (nextval for mysequence) from sysibm.sysdummy1
>
> From the example in the book I would guess the latter approach is what is
> expected but I just wanted to verify this.
>

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