Let me rephrase my previous question:
What is your specific question? Why do you have doubts? What kind of answer
are you expecting?
On Wed, Oct 4, 2023 at 3:17 PM Stefan Sator <sator.stefa...@gmail.com>
wrote:
> After lots of try and error this works, but is it the "correct" way?
>
> CustomerobjectdbObject o = CustomerobjectdbObject.CUSTOMEROBJECTDB_OBJECT
> .as("o");
> CustomerobjectdbHistory h = CustomerobjectdbHistory.
> CUSTOMEROBJECTDB_HISTORY.as("h");
> CustomerobjectdbHistory l = CustomerobjectdbHistory.
> CUSTOMEROBJECTDB_HISTORY.as("l");
>
> Condition c = getTenantCondition(o);
>
> //@formatter:off
> var fetch = db.select(o.NAME,
> o.STATUS.convertFrom(x -> ObjectSafetyStatus.from(x)),
> o.CHANGED_AT,
> l.MAJOR_VERSION,
> l.MINOR_VERSION,
> l.COMMENT)
> .from(o,
> lateral(DSL.select(h.MAJOR_VERSION,
> h.MINOR_VERSION,
> h.COMMENT)
> .from(h)
> .where(h.OBJECT_ID.eq(o.ID))
> .orderBy(h.MAJOR_VERSION.desc(),
> h.MINOR_VERSION.desc())
> .limit(1)).as(l)
> )
> .where(c)
> .orderBy(o.CHANGED_AT.desc())
> .limit(10)
> .fetch(mapping((r1, r2, r3, r4, r5, r6) -> new HomeObjectTableUIModel(r1,
> r2, r3, r4, r5, r6)));
> //@formatter:on
>
> return fetch;
>
> On Wednesday, 4 October 2023 at 14:43:45 UTC+2 lukas...@gmail.com wrote:
>
>> Stefan,
>>
>> What is your specific question? What have you tried? What didn't work?
>>
>> On Wed, Oct 4, 2023 at 2:32 PM Stefan Sator <sator.s...@gmail.com> wrote:
>>
>>> Hi Lukas,
>>> I dont get it to work for just some fields of the lateral join.
>>>
>>> How do I do this?
>>> public List<HomeShopTableUIModel> getShopPage() {
>>> ShopdbObject o = ShopdbObject.SHOPDB_OBJECT;
>>> ShopdbHistorie h = ShopdbHistorie.SHOPDB_HISTORIE;
>>> ShopdbHistorie l = ShopdbHistorie.SHOPDB_HISTORIE;
>>>
>>> Condition c = getTenantCondition(o);
>>>
>>> //@formatter:off
>>> var fetch = db.select(o.NAME)
>>> .from(o,
>>> lateral(DSL.select(h.COMMENT)
>>> .from(h)
>>> .where(h.OBJECT_ID.eq(o.ID))
>>> .orderBy(h.MAJOR_VERSION.desc(),
>>> h.MINOR_VERSION.desc())
>>> .limit(1)).as("l")
>>> )
>>> .where(c)
>>> .orderBy(o.CHANGED_AT.desc())
>>> .limit(10)
>>> .fetch();
>>> //@formatter:on
>>>
>>> On Tuesday, 3 October 2023 at 10:49:33 UTC+2 Stefan Sator wrote:
>>>
>>>> And even better:
>>>>
>>>> CustomerobjectdbObject o = CustomerobjectdbObject.
>>>> CUSTOMEROBJECTDB_OBJECT.as("o");
>>>> CustomerobjectdbHistory h = CustomerobjectdbHistory.
>>>> CUSTOMEROBJECTDB_HISTORY.as("h");
>>>> CustomerobjectdbHistory l = CustomerobjectdbHistory.
>>>> CUSTOMEROBJECTDB_HISTORY.as("l");
>>>>
>>>> //@formatter:off
>>>> var fetch = db.select(o.NAME, l.COMMENT)
>>>>
>>>> .from(o,
>>>> lateral(DSL.select(h.COMMENT)
>>>> .from(h)
>>>> .where(h.OBJECT_ID.eq(o.ID))
>>>> .orderBy(h.MAJOR_VERSION.desc(),
>>>> h.MINOR_VERSION.desc())
>>>> .limit(1)).as(l)
>>>> )
>>>> .orderBy(o.CHANGED_AT.desc())
>>>> .limit(10)
>>>> .fetch();
>>>> On Tuesday, 3 October 2023 at 10:47:12 UTC+2 Stefan Sator wrote:
>>>>
>>>>> Final solution:
>>>>>
>>>>> CustomerobjectdbObject o = CustomerobjectdbObject.
>>>>> CUSTOMEROBJECTDB_OBJECT.as("o");
>>>>> CustomerobjectdbHistory h = CustomerobjectdbHistory.
>>>>> CUSTOMEROBJECTDB_HISTORY.as("h");
>>>>> CustomerobjectdbHistory l = CustomerobjectdbHistory.
>>>>> CUSTOMEROBJECTDB_HISTORY.as("l");
>>>>>
>>>>> //@formatter:off
>>>>> var fetch = db.select(o.NAME, l.field("comment"))
>>>>> .from(o,
>>>>> lateral(DSL.select(h.COMMENT)
>>>>> .from(h)
>>>>> .where(h.OBJECT_ID.eq(o.ID))
>>>>> .orderBy(h.MAJOR_VERSION.desc(),
>>>>> h.MINOR_VERSION.desc())
>>>>> .limit(1)).as(l)
>>>>> )
>>>>> .orderBy(o.CHANGED_AT.desc())
>>>>> .limit(10)
>>>>> .fetch();
>>>>>
>>>>> On Tuesday, 3 October 2023 at 10:44:43 UTC+2 Stefan Sator wrote:
>>>>>
>>>>>> This works, but it doesnt look elegant.
>>>>>>
>>>>>> Is there a better way?
>>>>>>
>>>>>> CustomerobjectdbObject o = CustomerobjectdbObject.
>>>>>> CUSTOMEROBJECTDB_OBJECT.as("o");
>>>>>> CustomerobjectdbHistory h = CustomerobjectdbHistory.
>>>>>> CUSTOMEROBJECTDB_HISTORY.as("h");
>>>>>> CustomerobjectdbHistory l = CustomerobjectdbHistory.
>>>>>> CUSTOMEROBJECTDB_HISTORY.as("l");
>>>>>>
>>>>>> //@formatter:off
>>>>>> var fetch = db.select(o.NAME, l.field("comment"))
>>>>>>
>>>>>> .from(o,
>>>>>> lateral(DSL.select(h.COMMENT)
>>>>>> .from(h)
>>>>>> .where(h.OBJECT_ID.eq(o.ID))
>>>>>> .orderBy(h.MAJOR_VERSION.desc(),
>>>>>> h.MINOR_VERSION.desc())
>>>>>> .limit(1)).as("l")
>>>>>> )
>>>>>> .orderBy(o.CHANGED_AT.desc())
>>>>>> .limit(10)
>>>>>> .fetch();
>>>>>> On Tuesday, 3 October 2023 at 10:28:05 UTC+2 lukas...@gmail.com
>>>>>> wrote:
>>>>>>
>>>>>>> See:
>>>>>>> https://www.jooq.org/doc/latest/manual/sql-building/column-expressions/table-columns/dereferenced-table-columns/
>>>>>>>
>>>>>>> On Tue, Oct 3, 2023 at 10:18 AM Stefan Sator <sator.s...@gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Because I get sometimes confused.
>>>>>>>> I figured that out aswell just now before reading your comment :-)
>>>>>>>>
>>>>>>>> But how do I select only some of the columns from the lateral join?
>>>>>>>>
>>>>>>>> var fetch = db.select()
>>>>>>>> .from(o,
>>>>>>>> lateral(DSL.select(h.COMMENT)
>>>>>>>> .from(h)
>>>>>>>> .where(h.OBJECT_ID.eq(o.ID))
>>>>>>>> .orderBy(h.MAJOR_VERSION.desc(),
>>>>>>>> h.MINOR_VERSION.desc())
>>>>>>>> .limit(1)).as("l")
>>>>>>>> )
>>>>>>>> .orderBy(o.CHANGED_AT.desc())
>>>>>>>> .limit(10)
>>>>>>>> .fetch();
>>>>>>>>
>>>>>>>> On Tuesday, 3 October 2023 at 10:09:53 UTC+2 lukas...@gmail.com
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Why put your LATERAL derived table in SELECT with jOOQ, when you
>>>>>>>>> don't do that with SQL?
>>>>>>>>>
>>>>>>>>> On Tue, Oct 3, 2023 at 10:04 AM Stefan Sator <sator.s...@gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> Hello Lukas,
>>>>>>>>>>
>>>>>>>>>> how do I write this query correctly?
>>>>>>>>>>
>>>>>>>>>> Wanted:
>>>>>>>>>> SELECT o.name, l.comment
>>>>>>>>>> FROM customerobjectdb_object AS o,
>>>>>>>>>> LATERAL (SELECT * FROM customerobjectdb_history AS h WHERE
>>>>>>>>>> h.object_id
>>>>>>>>>> = o.id
>>>>>>>>>> order by h.major_version desc, h.minor_version desc limit 1
>>>>>>>>>> ) AS l
>>>>>>>>>> ORDER BY o.id;
>>>>>>>>>>
>>>>>>>>>> Jooq(not correct)
>>>>>>>>>> var fetch = db.select(o.NAME,
>>>>>>>>>> //o.STATUS.convertFrom(x -> ObjectSafetyStatus.from(x)),
>>>>>>>>>> //o.CHANGED_AT,
>>>>>>>>>> //o.VERSION,
>>>>>>>>>> lateral(DSL.select(h.COMMENT)
>>>>>>>>>> .from(h)
>>>>>>>>>> .where(h.OBJECT_ID.eq(o.ID))
>>>>>>>>>> .orderBy(h.MAJOR_VERSION.desc(),
>>>>>>>>>> h.MINOR_VERSION.desc())
>>>>>>>>>> .limit(1)).as("l")
>>>>>>>>>> )
>>>>>>>>>> .from(o)
>>>>>>>>>> .orderBy(o.CHANGED_AT.desc())
>>>>>>>>>> .limit(10)
>>>>>>>>>> .fetch();
>>>>>>>>>>
>>>>>>>>>> SQL
>>>>>>>>>> select "o"."name", row ("l"."comment") as "l"
>>>>>>>>>> from "public"."customerobjectdb_object" as "o"
>>>>>>>>>> order by "o"."changed_at" desc fetch next ? rows only
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
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>>>>>>>>>>
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