Maybe I make it to difficult and maybe I express myself not always good due
that english is not my native language, sorry. One step back:
*step 1. I have made an SQL query which is working.*
*step 2. next, I have put this query in the JOOQ converter, with this
result. I call this "query with qoutes", table name, field name, aliases
are between quotes etc. But is hard to read. *
fun InconsistencyCheck(zaakId: ZaakId): Boolean = usingDSL { context ->
context.select(
`when`(count().gt(0), `val`(true) ).otherwise(`val`(false))
// result of the query true or false, and I'm expecting that this is
)
// returned to the caller function
.from(table(unquotedName("zaak")).`as`(unquotedName("zz")),
table(unquotedName("agenda")).`as`(unquotedName("za")),
table(unquotedName("agenda_item")).`as`(unquotedName("zai"))
)
.where(field(name("zz", "id")).eq(zaakId.value)
.and(field(name("za", "zaak_id")).eq(field(name("zz", "id"))))
.and(field(name("za", "actueel")).eq(inline(true)))
.and(field(name("zai", "agenda_id")).eq(field(name("za", "id"))))
).fetchOne(0, Boolean.class) == true
// Although this is Java, it is working and '== true' was suggested by
IntelliJ
}
*step 3: I try to transform the query of step 2 into a "query without
quotes". For me it is the same query technically, it turns into an error on
fetchOne.*
override fun InconsistencyCheck(zaakId: ZaakId): Boolean = usingDSL { context
->
val ZaakMainAlias = ZAAK.`as`("ZAAK_MAIN")
val AgendaMainAlias = AGENDA.`as`("AGENDA_MAIN")
val AgendaItemMainAlias = AGENDA_ITEM.`as`("AGENDA_ITEM_MAIN")
context.select(
`when`(count().gt(0), `val`(true)).otherwise(`val`(false))
)
.from(ZaakMainAlias
,AgendaMainAlias
,AgendaItemMainAlias
)
.where(ZaakMainAlias.ID.eq(zaakId.value)
.and(AgendaMainAlias.ZAAK_ID.eq(ZaakMainAlias.ID))
.and(AgendaMainAlias.ACTUEEL.eq(inline(true)))
.and(AgendaItemMainAlias.AGENDA_ID.eq(AgendaMainAlias.ID))
).fetchOne(0, Boolean.class) == true
// this gives the error.
}
*Why is the query of step 2 working and step 3 not, with fetchOne?*
And understand now, fetchOne() is returning a Record instead of just
returning the Boolean true or false.But the query of step 2 is working!
And I'm asking myself, how do others this, just returning true or false.
Thats not a weird idea, is it?
I have also tried the Kotlin Boolean:
.fetchOne(0, Boolean::class.javaPrimitiveType) == true
or
.fetchOne(0, Boolean::class.javaObjectType) == true
This is not given an compiler error, but when run this, it is not working
in the way it does in step 2. And it gives an error at run-time.
This my last attempt, otherwise I will leave the query as in step2, which
is working, but I would like to understand why the query of step 3 is not
working?
Op maandag 2 september 2024 om 15:07:30 UTC+2 schreef lukas...@gmail.com:
> I guess the confusion here is this:
>
> ResultQuery.fetchOne() returns a Record
> ResultQuery.fetchOne(int) returns the value of type java.lang.Object at
> column index "int". This is just convenience API for
> ResultQuery.fetchOne()?.get(int)
> ResultQuery.fetchOne(int, Class<U>) returns the value of type U at column
> index "int". This is just convenience API for
> ResultQuery.fetchOne()?.get(int, Class<U>)
>
> jOOQ has a lot of convenience API like this. Does this help?
>
> On Mon, Sep 2, 2024 at 2:57 PM Lukas Eder <lukas...@gmail.com> wrote:
>
>>
>>
>> On Mon, Sep 2, 2024 at 2:34 PM Nico van de Kamp <nicova...@gmail.com>
>> wrote:
>>
>>> The flag "...flag governing the identifier style...", if understand it,
>>> this is about rendering query in the console log. How is shown in the
>>> console log of IntelliJ, right? In the settings.java file I found that it
>>> is set as:
>>> protected RenderQuotedNames renderQuotedNames = RenderQuotedNames.
>>> EXPLICIT_DEFAULT_QUOTED;
>>>
>>
>> It affects all SQL rendering, including that of the console log.
>>
>>
>>> But what I mean is at the time of coding. The JooQ converter is so far
>>> as I know qoutes everthing. And I have that qouted query working.
>>> Now I'm trying to transform the same query and remove the qoutes, so
>>> that it is easier to read and to follow. When I write this, I'm suddenly
>>> thinking does the compiler use the 'RenderQoutedNames' flag?
>>>
>>
>> I don't really know what you mean by "compiler" using the flag, or "jOOQ
>> converter" in general. jOOQ renders SQL, irrespective of how you're using
>> it, or where you're sending / executing this SQL. This flag affects how
>> jOOQ renders SQL. Anyway, I don't think that's the question here. I was
>> just trying to help given that you thought things were "unreadable." Let's
>> focus on the actual problem.
>>
>>
>>> I believe when I'm writing this, I slowly understand what's happening.
>>> My function will return an Kotlin "Boolean". My query result is true or
>>> false and I expect simply that this result is returned by the function. But
>>> that is an misunderstood I suppose. The result of the query is a JooQ
>>> boolean... or at least not a Kotlin Boolean? Or has this nothing todo with
>>> ift? I have tried this:
>>> .fetchOne()?.let { true } ?: false // this doesn't work
>>> either
>>>
>>
>> jOOQ is an API written in Java. When you're using it from Kotlin, you
>> will occasionally have to know about how Kotlin interoperates with Java.
>> The Kotlin "Boolean?" to "java.lang.Boolean" mapping is straightforward, in
>> my opinion.
>>
>> Now, fetchOne() returns an "org.jooq.Record?" As you can see e.g. the
>> Javadoc:
>>
>> https://www.jooq.org/javadoc/latest/org.jooq/org/jooq/ResultQuery.html#fetchOne()
>>
>> Your IDE probably helps you with this as well. Do look at the type hints
>> from your IDE, or assign expressions to local variables with explicit type
>> declarations to better understand what's going on. With this in mind, you
>> obviously can't just make this expression true or false like that. The
>> expression is of type Record! (possibly containing 1 row and 1 column, in
>> your case). I think this suffices to help you figure out what you're going
>> to do?
>>
>>
>>> *My expection is: the query result is true or false. That result needs
>>> to be returned by the function, to the caller function.*
>>> * What for me hard to understand is, I have written the exact same query
>>> without qoutes, but now the query without the qoutes, I get an error on
>>> fetchOne?And it is the same fetchOne as the query with qoutes!*
>>>
>>
>> I don't know what you mean by "with quotes and without quotes," the
>> discussion starts being a bit confusing for me. But I already explained to
>> you why you can't pass Boolean.class there (you probably took a Java
>> example off the web). You have to pass the Kotlin equivalent
>> Boolean::class.java expression instead.
>>
>> *(BTW all the queries in this project are unqouted, I'm now a few months
>>> on this project, somebody else has started this project 5 years ago, but
>>> has left)*
>>>
>>> Op maandag 2 september 2024 om 08:04:34 UTC+2 schreef lukas...@gmail.com
>>> :
>>>
>>> We have a flag governing the identifier style, if this is what's
>>> troubling you in terms of "hard to read":
>>>
>>> https://www.jooq.org/doc/latest/manual/sql-building/dsl-context/custom-settings/settings-name-style
>>>
>>> Boolean.class isn't valid kotlin. Did you intend to write
>>> Boolean::class? But with the jOOQ API, you'll have to pass
>>> Boolean::class.java (in order to pass a java.lang.Class<?> reference)
>>>
>>> On Sun, Sep 1, 2024 at 9:54 PM Nico van de Kamp <nicova...@gmail.com>
>>> wrote:
>>>
>>> I hava converted with the JooQ converter from SQL to JooQ. After some
>>> struggling it is working. But I don't like it with, it hard and a lot to
>>> read like:
>>> table(unquotedName("tablename")).`as`(unquotedName("zz")),
>>> and
>>> field(name("zai2", "a_id")).eq(field(name("zai", "a_id")))
>>>
>>> So I have rewritten this like:
>>> override fun inconsistentCheck(zaakId: ZaakId): Boolean = usingDSL {
>>> context
>>> ->
>>>
>>> val ZaakMainAlias = ZAAK.`as`("ZAAK_MAIN")
>>> val AgendaMainAlias = AGENDA.`as`("AGENDA_MAIN")
>>> val AgendaItemMainAlias = AGENDA_ITEM.`as`("AGENDA_ITEM_MAIN")
>>>
>>> context
>>> .select(
>>> `when`(count().gt(0), `val`(true)).otherwise(`val`(false))
>>> )
>>> .from(ZaakMainAlias
>>> ,AgendaMainAlias
>>> ,AgendaItemMainAlias
>>> )
>>> .where(ZaakMainAlias.ID.eq(zaakId.value)
>>> .and(AgendaMainAlias.ZAAK_ID.eq(ZaakMainAlias.ID))
>>> .and(AgendaMainAlias.ACTUEEL.eq(inline(true)))
>>> .and(AgendaItemMainAlias.AGENDA_ID.eq(AgendaMainAlias.ID))
>>>
>>> ).fetchOne(0, Boolean.class) == true
>>> }
>>>
>>> But query itself has not been changed, just removing the quoted text.
>>> Now I get an error "None of the following functions can be called with
>>> the arguments supplied." (see screenshot.) on
>>> ).fetchOne(0, Boolean.class) == true
>>> Why? Ok, the query is transformed from qouted to non-qouted, but still
>>> the same further!??
>>>
>>> What kind of mistake do I maken or do I not understand?
>>>
>>> If I look to the screenshot, There is now not a Boolean expected? [image:
>>> fetchOne Boolean error.png]
>>>
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>>>
>>
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