Hi Lukas,
Thank you very much for your explanation. Using name() helped a lot.
The reason to go with no code generator is the dynamic project structure.
The objective is to develop an external tool to the already existing
product which changes its schema often enough to make code generation
pretty useless in this case. The product is designed in another programming
language and is capable of using different DBs. So going with plain JDBC or
something like Apache Derby isn't the choice.
Using name() I could overcome the complications I had with selects.
However, now I'm on another point. I need to insert a number of records
into two related tables. The tables are connected with the foreign key. I
would like to do this covered into a transaction. In the example below
authorRecord is null. This way I have no chance to find out the generated
id for the author table. Can you please advise?
dslContext.transaction((configuration) -> {
Record authorRecord = using(configuration)
.insertInto(table("author"), field("first_name"),
field("last_name"))
.values("Evil", "Emerger")
.returning(field("id"))
.fetchOne();
@NotNull Result<Record> bookRecord = using(configuration)
.insertInto(table("book"), field("author_id"),
field("name"), field("publishing_date"))
.values(authorRecord.get(0), "Evolution of SQL",
2010)
.returning()
.fetch();
}
.......
Best regards,
Boris
On Fri, May 28, 2021 at 11:19 PM Lukas Eder <[email protected]> wrote:
> Hi Boris,
>
> Thanks a lot for your message. Quick question first: Why are you not using
> the code generator? You will get a *much* better experience with jOOQ in
> general, if you're using the code generator. Omitting the code generator
> usually only makes sense when your schema is dynamic, and not known at
> compile time.
>
> Meanwhile, regarding your particular issue, there's a common confusion
> between the plain SQL API (which you were using), and the API to construct
> references from identifiers (which you should be using).
>
> See the relevant sections of the documentation here:
> - https://www.jooq.org/doc/latest/manual/sql-building/plain-sql/
> - https://www.jooq.org/doc/latest/manual/sql-building/names/
>
> Or this blog post:
> - https://blog.jooq.org/2020/04/03/whats-a-string-in-the-jooq-api/
>
> I hope this helps,
> Lukas
>
> On Fri, May 28, 2021 at 8:48 PM Boris Heismann <[email protected]>
> wrote:
>
>> Hi,
>>
>> I'm evaluating jOOQ pro trial 3.14.11. I'm playing with it without to use
>> code generator. Using fetch.intoMap("author.id") produces:
>> java.lang.IllegalArgumentException: Field (null) is not contained in Row
>> ("author"."id", "author"."first_name", "author"."last_name", "book"."id",
>> "book"."author_id", "book"."name", "book"."pubshing_date")
>>
>> The RDBMS used is MariaDB. The piece of code is:
>> SelectFinalStep<Record> select = dslContext.select()
>> .from(table("author")
>> .join(table("book"))
>> .on(field("book.author_id")
>> .eq(field("author.id"))))
>> .where(field("book.author_id")
>> .eq(1));
>> select.fetch().intoMap("author.id");
>>
>> Using select.fetch().intoMap("id") generates a warning that field "id" is
>> ambiguous because the table "book" uses it as well:
>> INFO: Ambiguous match found for id. Both "author"."id" and "book"."id"
>> match.
>>
>> What is the right proceeding here?
>>
>> Best regards.
>>
>> Boris
>>
>>
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