Here is what i've done with entityframework.
I have a very complex query and i wanted to write it as a raw sql query this way:
var queryable1 = dbcontext.Set<MyViewModel>().FromSqlRaw(
" SELECT "
+ " field1,"
+ " field2,"
+ " <calculation1> as field3,
+ " (select count(*) from ...) as field4, "
...
+ " FROM mytable "
+ " LEFT JOIN xxxx "
+ " WHERE ...");
It works fine: I can query this way:
var queryable2 = queryable1.Where(....);
I have a problem when i try to make a count:
var count1 = queryable1.Count();
The count result is good but if i look the sql query executed on sql server i can see this:
SELECT COUNT(*) FROM
(SELECT field1, field2, <calculation1> as field3, ... FROM mytable WHERE ...)
This query is very slow. Is there a way to do something like that:
SELECT count(*) FROM mytable WHERE ...
Thanks
Related
I'am trying to translate this spring data JDBC query to spring spring data JPQL
"SELECT t.id FROM foo t WHERE t.id IN (" +
"SELECT l.foo_id FROM bar l " +
"JOIN (VALUES :keyValueCombinations ) AS i (input_name) ON l.name = i.input_name)" +
"GROUP BY l.foo_id " +
"HAVING COUNT(*) = :keyValueCombinationsSize" +
")"
Output for SQL Server is:
SELECT t.id FROM foo t WHERE t.id IN(SELECT l.foo_id FROM label l
JOIN (values ('test'), ('test1') ) AS i (input_name)
ON l.name = i.input_name GROUP BY l.foo_id
HAVING COUNT(*) = 2 )
Query for JQPL
"SELECT t FROM foo t WHERE t.id IN (" +
"SELECT l.foo.id FROM bar l " +
"JOIN (VALUES :keyValueCombinations ) AS i (input_name) ON l.name = i.input_name)" +
"GROUP BY l.foo.id " +
"HAVING COUNT(l) = :keyValueCombinationsSize" +
")"
Error on runtime is:
[27, 153] The expression is not a valid conditional expression.
[153, 224] The query contains a malformed ending.
Anyone have an idea what exactly is wrong?
So I have this SQL query in one of the Java files as follows: (I am giving the sample & not the real one)
#Query( "Select T1.ID" +
", T1.CD" +
", T1.Date" +
", T1.Name" +
" From Table1 T1" +
" Join Table2 T2 " +
" On T1.ID = T2.ID" +
" Where T1.CD in
("test1","test2")" +
" And NOT EXISTS" +
" (Select 1 From Table2 T3"
+
" Where T3.ID = T1.ID +
" And T3.Name NOT
IN('P','Q','R')"+
" )")
List<Object[]> methodToRetrieve
(#Param("sequence")String
sequence,#Param("code") code);
Can someone please tell me where can I add "With UR" in the above query.
PSA: include your Db2 platform/version in your posts; also consider using a platform specific db2 tag if applicable (db2-luw or db2i)
The isolation-clause appears after the fullselect in the documentation
so your code should be
#Query( "Select T1.ID" +
", T1.CD" +
", T1.Date" +
", T1.Name" +
" From Table1 T1" +
" Join Table2 T2 " +
" On T1.ID = T2.ID" +
" Where T1.CD in
("test1","test2")" +
" And NOT EXISTS" +
" (Select 1 From Table2 T3"
+
" Where T3.ID = T1.ID +
" And T3.Name NOT
IN('P','Q','R')"+
" ) WITH UR")
List<Object[]> methodToRetrieve
(#Param("sequence")String
sequence,#Param("code") code);
i wan't query like this:
#Query(
nativeQuery = true,
value = "select vp.id , vp.identity, vp.vehicle_id, dt.i " +
"from vehicle_plate vp" +
" inner join (select max(vp2.id) as id, vp2.vehicle_id as vId from vehicle_plate vp2 group by vp2.vehicle_id) as vpg" +
" ON vp.id = vpg.id and vp.vehicle_id = vpg.vId" +
" cross join (values :dates ) dt(i)" +
"where vp.vehicle_id in (:vehicleIds)"
)
Page<Object[]> findAllJoinByDate(
#Param("dates") List<java.util.Date> dates,
#Param("vehicleIds") List<Integer> vehicleIds,
Pageable pageable
);
my problem is the part of query cross join (values :dates ) dt(i) and date parameter unknown by jpa.
should be same as
cross join (values ('2019-10-08') , ('2019-09-07') ) dt(i)
is there solution for this?
This is my database query
select v.FK_EQUIPMENT, sum(fuel) as fuel,v1.END_TIME_METER
from vp_reports v ,
(select distinct FK_EQUIPMENT,END_TIME_METER
from vp_reports v
where MODIFIED_ON in (select max(MODIFIED_ON)
from vp_reports
where END_TIME_METER is not null
group by FK_EQUIPMENT )) v1
where v.FK_EQUIPMENT = v1.FK_EQUIPMENT
group by v.FK_EQUIPMENT,v1.END_TIME_METER;
and I am writing the same in jpa
#Query("select new Reports (v.fkEquipment, sum(fuel) as fuel, v1.endTimeMeter) "
+ " from Reports v , "
+ " (select distinct fkEquipment, endTimeMeter from Reports v "
+ " where modifiedOn in ( select max(modifiedOn) from Reports where endTimeMeter is not null "
+ " group by fkEquipment)) v1 "
+ " where v.fkEquipment = v1.fkEquipment "
//+ " and v.mrfId= ?1 "
//+ " and v.shift in (?2) and v.fkStatusDei= ?3 and v.assignedDate between to_date(?4, 'yyyy-mm-dd') and to_date(?5, 'yyyy-mm-dd') "
+ " GROUP BY v.fkEquipment,v1.endTimeMeter ")
List<Reports> findByMrfIdAndShiftAndFkStatusDeiAndAssignedDate(String mrfId, String shift, long fkStatusDei, String from, String to);
and getting below error -
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException:
unexpected token: ( near line 1, column 107 [select new Reports
(v.fkEquipment, sum(fuel) as fuel, v1.endTimeMeter) from
com.dei.domain.Reports v , (select distinct fkEquipment,
endTimeMeter from com.dei.domain.Reports v where modifiedOn in (
select max(modifiedOn) from com.dei.domain.Reports where endTimeMeter
is not null group by fkEquipment)) v1 where v.fkEquipment =
v1.fkEquipment GROUP BY v.fkEquipment,v1.endTimeMeter ] at
org.hibernate.hql.internal.ast.QuerySyntaxException.convert(QuerySyntaxException.java:91)
at
org.hibernate.hql.internal.ast.ErrorCounter.throwQueryException(ErrorCounter.java:109)
at
org.hibernate.hql.internal.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:304)
at
org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:203)
Could you please help me ? or how do I convert my DB query to JPQL?
i got 2 Entities (ModTopScope and ModInstallResults) with One-to-Many relations
and NamedQuery:
#NamedQuery(name="ModTopScope.getScopesForActiveSystems",
query="SELECT s, COUNT(s.modInstallResults) FROM ModTopScope s LEFT JOIN FETCH s.modInstallResults " +
"WHERE s.modScopeType.modSystem.activated = true " +
"GROUP BY s " +
"ORDER BY COUNT(s.modInstallResults) DESC")
It is ok, except there are no records in query result list for ModTopScope, which have no corresponding records in ModInstallResults table. How can i fix it ?
The native sql, that selects records, which have no corresponding records in mod_install_resutls table:
select s.id, count(i.id) from mod_top_scopes s left join mod_install_results i on s.id=i.scope_id group by s.id order by count(i.id)
OK, finally i wrote the correct querym i wrote comment,
SELECT DISTINCT s, COUNT(i) FROM ModTopScope s LEFT JOIN s.modInstallResults i " + "WHERE s.modScopeType.modSystem.activated = true " + "GROUP BY s " + "ORDER BY COUNT(i) DESC