Обсуждение: Require assistance in Postgres + Hibernate : Error:java.math.BigInteger cannot be cast to java.math.BigDecimal

Hi,

On Tue, 2018-02-13 at 14:28 +0530, Vinodh NV wrote:
> Hi,
> 
> Require assistance on the below:
> 
> Code snippet:
> Map<String,Object> ic;
> //Populate values for ic
> long count = ((BigDecimal)ic.get(“EB”)).longValue();
> 
> 
> Getting the below error:
>     java.math.BigInteger cannot be cast to java.math.BigDecimal
>     ®java.lang.ClassCastException: java.math.BigInteger cannot be
> cast to java.math.BigDecimal
> 
> Since this is not part of a query doing select cast (EB as bigint)
> will not help in this case:
> 
> Can u let me know the solution for this?
> 
> Regards,
> Vinodh


This is not a Postgres question per se.

The method is documented as:-

public static BigDecimal valueOf(long val)


HTH,
Rob

Vinodh:

On Tue, Feb 13, 2018 at 9:58 AM, Vinodh NV <linktovinodh@gmail.com> wrote:
> Require assistance on the below:
> Code snippet:
> Map<String,Object> ic;
> //Populate values for ic
> long count = ((BigDecimal)ic.get(“EB”)).longValue();
>
>
> Getting the below error:
>     java.math.BigInteger cannot be cast to java.math.BigDecimal
>     ®java.lang.ClassCastException: java.math.BigInteger cannot be cast to
> java.math.BigDecimal
>
> Since this is not part of a query doing select cast (EB as bigint) will not
> help in this case:

I do not know hibernate, so Ihaven't the sligstest idea of why
get("EB") returns BigInteger or why you do not cast it to BigInteger
instead of BigDecimal.

But if your problem is it sometimes has Bigdecimal and sometimes
BigInteger you could try casting it to the parent, Number, which is
the one specifying longValue() and would make the code work with both.



Francisco Olarte.

On Tue, Feb 13, 2018 at 12:39 PM, rob stone <floriparob@gmail.com> wrote:
>> long count = ((BigDecimal)ic.get(“EB”)).longValue();
..
> The method is documented as:-
> public static BigDecimal valueOf(long val)

His problem seems to be the opposit, he does not have the long value
and wants it.

Francisco Olarte.

Vinodh:

You are BOTTOM QUOTING a message which has nothing to thank me from, I
was just trying to clarify a misunderstanding of your original
question.

On Tue, Feb 13, 2018 at 4:14 PM, Vinodh NV <linktovinodh@gmail.com> wrote:
> Thanks for the update Francisco. I had one more query:
> In Oracle the syntax for calling a stored procedure is
>    Session sess = (Session) entityManager.getDelegate();
> sess.createSQLQuery("{ call reset() }").executeUpdate();
>
> Can you please let me know if the below equivalent for postgres is correct?
>    Session sess = (Session) entityManager.getDelegate();
> sess.createSQLQuery("select reset()");

Had you quoted the correct message you would have seen I told you I do
not know hibernate, so no idea whar a session, entityManaer or or
delegates are. I also haven't done anthing serious with Oracle in this
century. So, I cannot tell you much.

Which I do know is in classic postgres you normally call functions
this way, by selecting.

Francisco Olarte.