Hibernate 5无法将字符串与int进行比较

Question

I migrate hibernate from version 4.3.7 to 5.3.7 Currently my code goes like this

public BcData findByBcCode(int clearingNumber) {
        CriteriaBuilder cb = getCriteriaBuilder();
        CriteriaQuery<BcData> query = cb.createQuery(BcData.class);
        Root<BcData> bcAlias = query.from(BcData.class);
        query.where(cb.equal(bcAlias.get(BcData_.bcCode), clearingNumber));
        return findSingle(query, new HashMap<>());
    }

So in DB, bcCode has type String , values 00437 , 22437 and clearingNumber = 437.

In hibernate version 4.x , it can get result with bcCode = 00437 .

In version 5.x , result is null unless the input is clearingNumber = 00437

So question is that how can I get result same as version 4 without changing param type (int clearingNumber) .

Thanks. Update 1: Inside method equal, it takes input param as object, so generally it can compare many type of input parameters

@Override
    @SuppressWarnings("SuspiciousNameCombination")
    public Predicate equal(Expression<?> x, Object y) {
        return new ComparisonPredicate( this, ComparisonOperator.EQUAL, x, y );
    }

Update 2: finally I found a solution for this, we should parse bcCode as int before querying

Expression<Integer> bcCodeExpr = bcAlias.get(BcData_.bcCode).as(Integer.class);
query.where(cb.equal(bcCodeExpr, clearingNumber));

Answer 1

It should have not worked in the beginning. You probably hot lucky with how your string was casted into an integer.

It is not very smart to compare String with int. I would convert the string into an int by hand and then compare them. Or you need to somehow delete all trailing spaces in bcCode and then compare them as string with string.