Database Oracle, Query Date String JPA Repository Crud Repository, Java 8 - oracle

Question

NOTE: I can't put some privated code (Database or Java Code).
I have in the Database
CREATE TABLE "SCHEMA"."ENTITY"
(
"HCODFECREGISTR" DATE,
... BLABLA
)
The Entity
import java.util.Date;
public class Entity implements java.io.Serializable {
private Date hcodfecregistr;
....
}
In the Repository Interface
using
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.CrudRepository;
import org.springframework.data.repository.query.Param;
public interface EntityRepository extends CrudRepository<Entity, Long>,
JpaRepository<Entity, Long> {
public static final String USING_STRING
= " SELECT enti FROM Entity enti WHERE "
+ " (enti.hcodfecregistr BETWEEN TO_DATE(:stringIni,'dd/MM/yyyy hh24:mi') AND TO_DATE(:stringEnd,'dd/MM/yyyy hh24:mi'))";
#Query(value = USING_STRING)
List<Object[]> getEntityUsingString(
#Param("stringIni") String stringIni, #Param("stringEnd") String stringEnd);
public static final String USING_DATE
= " SELECT enti FROM Entity enti WHERE "
+ " (enti.hcodfecregistr BETWEEN :dateIni AND :dateIni) ";
#Query(value = USING_DATE)
List<Object[]> getEntityUsingDate(
#Param("dateIni") Date dateIni, #Param("dateEnd") Date dateEnd);
}
Now I want to perform a query.
Date fecha = //some java.util.Date
Calendar calendar = Calendar.getInstance();
calendar.setTime(fecha);
calendar.set(Calendar.HOUR, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
Date dateIni = calendar.getTime();
calendar.set(Calendar.HOUR, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
Date dateEnd = calendar.getTime();
SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
String stringIni = dateFormat.format(fecha) + " 00:00";
String stringEnd = dateFormat.format(fecha) + " 23:59";
Works!
List<Object[]> listaObjects = theRepository.getEntityUsingString(stringIni, stringEnd);
Fails! It does not bring me results (but it also does not show any error).
List<Object[]> listaObjects = theRepository.getEntityUsingDate(dateIni, dateEnd);
Question:
I want to understand Why using the same fecha (java.util.Date) the method getEntityUsingString works, but using the method getEntityUsingDate fails (
When I set the range using Date it does not bring me results, whereas when I set the range with String it does.).
In my opinion, it should yield the same result that complies with the range of dates.
What is the problem?

Answer 1

You did not write what error it was, so it's only my guess that the most likely error in this case is:
ORA-01861: literal does not match format string.
If this is the case, then the reason is that you are passing to the query two values of date type:
Date dateIni = calendar.getTime();
.....
Date dateEnd = calendar.getTime();
.....
theRepository.getEntityUsingDate(dateIni, dateEnd);
these values are bind to this parameters :stringIni and :stringEnd
BETWEEN TO_DATE(:stringIni,'dd/MM/yyyy hh24:mi') AND TO_DATE(:stringEnd,'dd/MM/yyyy hh24:mi')
Since TO_DATE( char, [format] ) functions expects CHAR (string) as a first parameter, but gets a date, then according to rules explained in this documentation see section: implicit conversion
The following rules govern implicit data type conversions: .... ....
When you use a SQL function or operator with an argument of a data
type other than the one it accepts, Oracle converts the argument to
the accepted data type.
it does an implicit conversion from date to string using TO_CHAR function.
This function uses the default date language from a session to format strings, so depending of this settings the date may be converted to something like 12/15/54, 19-06-11 12:23 PM, JUN 23, 2019 13:20 AM +01 etc.
This string 12/15/54 is then passed to TO_DATE(:stringIni,'dd/MM/yyyy hh24:mi'), and because this sting doesnt match format string, the error is thrown: ORA-01861: literal does not match format string