java - Converting varchar to integer on Oracle using Hibernate -

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in project score field in database varchar datatype, contains integer values need fetch records having score between 70 50. (i.e less 70).

my query 

query count_query =     stmt1.query().from(selectedtable).selectcount().    where(districtcolumn).equals(district_code).    and(score).isnull().or(score).lessthan("70").toquery();

trying to_num not accepting. accepts column data types.

try modify entity (tested on mysql):

@formula(value = " cast(score decimal(10,0) ) ") public long getscore()

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