I am trying to use the subquery in the attributes section.
This works fine when the subquery returns only one result. Otherwise it shows an error.
[2019-12-30 11:24:26] [21000] ERROR: more than one row returned by a subquery used as an expression
#Query("select new com.example.rest.ShiftResponse(s.id, s.displayTitle, s.startTime, s.endTime, s.max, (select comm from ShiftGroup sg inner join sg.committee comm where sg.shift.id = s.id)) from Shift s where s.event.id = ?1")
Here's the constructor's signature
public ShiftResponse(Long id, MultilangText displayTitle, LocalDateTime startTime, LocalDateTime endTime, Integer max, List<Committee> committees) {
Is there any way other than this to specify that I want that parameter to be a List?
Have you checked this link ? HQL new List(..) within new Object(..)
It seems to me it was a similar question. Does it answer your question ?
Related
I use spring data jpa with native query
I have already some query like this
How to use native query none parameter.
String q="SELECT t1.blockNumber-1 FROM someTAble t1 LEFT JOIN someTAble t2 ON t2.blockNumber = t1.blockNumber-1 WHERE t2.blockNumber IS NULL AND t1.blockNumber> 0 ORDER BY t1.blockNumber";
#Query(value = q,nativeQuery = true)
List<Entity> findByBlockNumberIs();
they are occur errors Column 'sequence' not found.
That query means are when i insert some Contiguous data int value then i find missing data.
But
this query working
SELECT *,t1.blockNumber-1 FROM someTAble t1 LEFT JOIN someTAble t2 ON t2.blockNumber = t1.blockNumber-1 WHERE t2.blockNumber IS NULL AND t1.blockNumber> 0 ORDER BY t1.blockNumber
The difference between the two queries is whether there is a '*' or not
how to change simple to my query.
How to i changed error
OR How to use spring data jpa predicate
QEntity qBe1= QEntity .blockEntity;
QEntity qBe2= QEntity .blockEntity;
build.and(qBe2.blockNumber.eq(be.getBlockNumber()-1))
.and(qBe2.blockNumber.isNull().and(qBe1.blockNumber.gt(0)));
is predicate can use left join?
well...
use this.
List<Integer> findByBlockNumber()
I'm pretty new to Postgresql. The issue I'm having is that I have a function that returns a table, but when I pass an UUID which is used in the where clause, it returns nothing. The funny thing is that if I take the SQL statement inside the function and run it by itself in PgAdmin, it gives me the right result.
The function looks like the following:
CREATE OR REPLACE FUNCTION get_service (
service_id uuid ) RETURNS TABLE(id uuid,title text,description text,category text,photo_url text,address text,
created_by uuid,created_on timestamp,service_rating float,rating_count bigint) AS $func$
Select
service.id,
service.title,
service.description,
service.category,
service.photo_url,
service.address,
service.created_by,
service.created_on,
CAST(AVG(rating.rating) AS float) as service_rating,
Count(rating.rating) as rating_count
from service
left join rating_service_map map
on service.id = map.service_id
left join rating
on rating.id = map.rating_id
where service.id = service_id
group by service.id,service.title,service.description,service.category,service.photo_url,service.address,service.created_by,service.created_on;
$func$ LANGUAGE SQL;
I have two records in my service table. The ID is of the type uuid and has a default value of uuid_generate_v4(). One of the records has an id of '2af3f03e-b2e5-44fd-89e8-3dc5fb641732'
If I run this I get no result:
select * from get_service('2af3f03e-b2e5-44fd-89e8-3dc5fb641732')
But if I run the following statement (the SQL portion of the function), then I get my right result:
Select
service.id,
service.title,
service.description,
service.category,
service.photo_url,
service.address,
service.created_by,
service.created_on,
CAST(AVG(rating.rating) AS float) as service_rating,
Count(rating.rating) as rating_count
from service
left join rating_service_map map
on service.id = map.service_id
left join rating
on rating.id = map.rating_id
where service.id = '2af3f03e-b2e5-44fd-89e8-3dc5fb641732'
group by service.id,service.title,service.description,service.category,service.photo_url,service.address,service.created_by,service.created_on;
I've also tried to cast the service_id (I've tried "where service.id = sevice_id::uuid" and "where service.id = CAST(service_id AS uuid)") but none of them worked.
I really appreciate it if you can tell me what I'm doing wrong. I've been at this for a couple of hours now.
Thank you.
I suspect that it's because the identifier service_id is ambiguous, being present as both a function parameter and a column in the map table.
Unlike a plain query, where such ambiguity would result in an error, conflicts in SQL functions are resolved by giving precedence to the column, so service_id in your case is actually referring to map.service_id.
You can either qualify it in your function body using the name of your function (i.e. get_service.service_id), or simply choose another name for the parameter.
I'm trying create a SELECT with GROUP BY in Firebird but I can't have any success. How could I do this ?
Exception
Can't format message 13:896 -- message file C:\firebird.msg not found.
Dynamic SQL Error.
SQL error code = -104.
Invalid expression in the select list (not contained in either an aggregate function or the GROUP BY clause).
(49,765 sec)
trying
SELECT FA_DATA, FA_CODALUNO, FA_MATERIA, FA_TURMA, FA_QTDFALTA,
ALU_CODIGO, ALU_NOME,
M_CODIGO, M_DESCRICAO,
FT_CODIGO, FT_ANOLETIVO, FT_TURMA
FROM FALTAS Falta
INNER JOIN ALUNOS Aluno ON (Falta.FA_CODALUNO = Aluno.ALU_CODIGO)
INNER JOIN MATERIAS Materia ON (Falta.FA_MATERIA = Materia.M_CODIGO)
INNER JOIN FORMACAOTURMAS Turma ON (Falta.FA_TURMA = Turma.FT_CODIGO)
WHERE (Falta.FA_CODALUNO = 238) AND (Turma.FT_ANOLETIVO = 2015)
GROUP BY Materia.M_CODIGO
Simple use of group by in firebird,group by all columns
select * from T1 t
where t.id in
(SELECT t.id FROM T1 t
INNER JOIN T2 j ON j.id = t.jid
WHERE t.id = 1
GROUP BY t.id)
Using GROUP BY doesn't make sense in your example code. It is only useful when using aggregate functions (+ some other minor uses). In any case, Firebird requires you to specify all columns from the SELECT column list except those with aggregate functions in the GROUP BY clause.
Note that this is more restrictive than the SQL standard, which allows you to leave out functionally dependent columns (ie if you specify a primary key or unique key, you don't need to specify the other columns of that table).
You don't specify why you want to group (because it doesn't make much sense to do it with this query). Maybe instead you want to ORDER BY, or you want the first row for each M_CODIGO.
i try use "like" method from Criteriabuilder for get all record based on pattern " 10% ".
I want get record where ID is - 101, 10002, 1003,1000 etc...
I've use this code:
Predicate p = cb.like(r.<String>get("ID").as(String.class), "10%")
but i got Exception where i see what postgres can't execute query like this:
SELECT ID, NAME, SOMETHING FROM TABLE WHERE ID LIKE 10%
That is JPA (Glassfish 4.x) generate wrond query.
Right query must like that :
SELECT ID, NAME, SOMETHING FROM TABLE WHERE CAST (ID as TEXT) LIKE '10%'
How to build query via Criteria API that i got a right query for postgres ?
Updated:
I try write a CAST function :
Expression<String> postgresqlCastFunction = cb.function("CAST", String.class, r.<String>get("ID").as(String.class));
Predicate p = cb.like(postgresqlCastFunction, "10%");
but got a query like this :
FROM TABLE WHERE (CAST(ID) LIKE ?)
, so, how to add need expression in function for this right result -
FROM TABLE WHERE (CAST(ID as TEXT) LIKE ?) ..
An example implementation using PostgreSQL native TO_CHAR function may look as follows:
JPQL
SELECT r FROM Records r
WHERE FUNCTION('TO_CHAR', r.ID, 'FM9999999999') LIKE :pattern
Criteria API
Path<String> id = r.get("ID");
Expression<String> format = cb.literal("FM9999999999");
Expression<String> function= cb.function("TO_CHAR", String.class, id, format);
ParameterExpression<String> pattern = cb.parameter(String.class, "pattern");
Predicate like = cb.like(function, pattern);
cq.where(like);
also you can build the query as an one-liner:
cq.where(cb.like(cb.function("TO_CHAR", String.class, r.get("ID"), cb.literal("FM9999999999")), cb.parameter(String.class, "pattern")));
Execute the above query:
Query q = em.createQuery(cq).setParameter("pattern", "10%");
I'm stuck trying to map this sql:
select dt.Id, dateadd(dd,datediff(dd,0,dt.CreatedAt),0) as Ct, DId, Amount
from dt, ad
where dt.ADId = ad.ADId and ad.Id = '13B29A01-8BF0-4EC9-80CA-089BA341E93D'
order by dateadd(dd,datediff(dd,0,dt.CreatedAt),0) desc, DId asc
Into an Entity Framework-compatible lambda query expression. I'd appreciate any help.
I think something like the code below should work.
Guid dtId = new Guid("13B29A01-8BF0-4EC9-80CA-089BA341E93D");
DateTime compareDt = new DateTime(...);
var q = from dt in dts
where dt.id == dtId
orderby dt.Ad.CreatedAt, Did
select new
{
dt.Ad,
(dt.CreatedAt - compareDt).Days,
DId,
Amount
};
dtId has to be outside of the query, because the entity framework mapper doesn't understand constructors that take parameters, similar for the DateTime. I couldn't completely figure out the datediff/dateadd part, looks like you're determining the total amount of days since a given datetime, which is what I assumed.
It could be that the datetime subtraction followed by TimeSpan.Days doesn't work in the query. If that's the case, pull it outside like so:
var q = from dt in dts
where dt.id == dtId
orderby dt.Ad.CreatedAt, Did
select new
{
dt.Ad,
dt.CreatedAt,
DId,
Amount
};
This creates an IEnumerable of objects that have a DateTime CreatedAt property. If you call .ToList() now, the query is executed, and you can calculate stuff that Entity Framework doesn't support. Again, if the first attempt worked, that's the best solution if the number of days since X is what you need.
from item in q.ToList()
select new
{
dt.Ad
(dt.CreatedAt - compareDt).Days,
DId,
Amount
};