Problems to get the difference of days between two days with queryDsl on Oracle 11

Question

I´m making a query with queryDsl.

I used this to create a BooleanExpresion

public BooleanBuilder getPredicate(BooleanBuilder pBuilderBusquePerso){

int dias = 30;

QEntity1 qEntity = QEntity1.entity;

pBuilderBusquePerso = pBuilderBusquePerso.and(qEntity.date1 != null
? (SQLExpressions.datediff(DatePart.day, qEntity.date2, qEntity.date1).lt(dias) ) :null );

return pBuilderBusquePerso;
}

And in another procedure I call and execute this as:

BooleanBuilder pBuilderBusquePerso = new BooleanBuilder();

Predicate filter =getPredicate(pBuilderBusquePerso);

Page<Entity> iLista = myRepository.findAll(getMyPredicate(usr, filter, tipoListado, null, estados), paginacion);

So the sql query result is:

select table1 ta1
......
exists (
select 1 
from
table2 ta2
where
   ta1.inv_id=ta2.inv_id 
 and diff_days(ta1.inv_exp_date, ta2.exp_date)<?
)

Giving the following error:

Caused by: java.sql.SQLException: ORA-00904: "DIFF_DAYS": invalid identifier

So the querysql translation for the ddbb oracle is wrong. Is there a way to translate from queryDsl to oracle functions? What should I need?

I also tried with DATETRUNC

pBuilderBusquePerso = pBuilderBusquePerso.and(qEntity.date1 != null
? (SQLExpressions.datetrunc(DatePart.day, qEntity.date1).castToNum(Integer.class).subtract(SQLExpressions.datetrunc(DatePart.day, qEntity.date2).castToNum(Integer.class))).lt(dias) :null );




exists (
select 1 
from
table2 ta2
 where
  ta1.inv_id=ta2.inv_id 
   and cast(trunc_day(ta2.exp_date) as number(10,0))-cast(trunc_day(ta1.inv_exp_date) as number(10,0))<?

Giving a similar error:

Caused by: java.sql.SQLException: ORA-00904: "TRUNC_DAY": invalid identifier

And addDays

pBuilderBusquePerso = pBuilderBusquePerso.and(qEntity.date1 != null
? ((SQLExpressions.addDays(qEntity.date2, dias)).after(qEntity.date1)):null );


exists (
select 1 
from
table2 ta2
where
  ta1.inv_id=ta2.inv_id 
   and add_days(ta1.inv_exp_date, ?)>ta1.exp_date
)

Giving another similar error:

Caused by: java.sql.SQLException: ORA-00904: "ADD_DAYS": invalid identifier

I was trying to follow this test to build my query https://searchcode.com/codesearch/view/17765673/

Thanks in advance.

Edit: this is the full error trace.

org.springframework.dao.InvalidDataAccessResourceUsageException: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:231)
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:214)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:417)
    at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59)
    at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
.....................


......................
Caused by: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
    at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:123)
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125)
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:110)

......................
......................
......................

(And here comes the ORA error)

Caused by: java.sql.SQLException: ORA-00904: "TRUNC_DAY": invalid identifier

    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)

.....

Answer 1

The SQLExpressions methods work only when used with SQL, not with JPA/JPQL queries. Querydsl JPA doesn't provide datediff out of the box, since JPA doesn't support it.