CODEWITHSUNDEEP
hibernateformulanative-sql
mikrobi
mikrobi

Reputation: 301

Native SQL query for a Hibernate entity using @Formula results in NullPointerException

I've got an simple Hibernate entity for which I use the @Formula annotation:

@Id
private Long id;

private String name;

@Formula("(select count(f.*) from foo f where f.id = id)")
private long bar;

When I try to load an entity with a native SQL Query:

EM.createNativeQuery("SELECT f.*, count(something) as bar FROM foo f WHERE f.name = '...'", Entity.class)

I get an NullPointerException:

java.lang.NullPointerException
at org.hibernate.loader.DefaultEntityAliases.intern(DefaultEntityAliases.java:193)
at org.hibernate.loader.DefaultEntityAliases.getSuffixedPropertyAliases(DefaultEntityAliases.java:151)
at org.hibernate.loader.DefaultEntityAliases.determinePropertyAliases(DefaultEntityAliases.java:93)
at org.hibernate.loader.DefaultEntityAliases.<init>(DefaultEntityAliases.java:65)
at org.hibernate.loader.ColumnEntityAliases.<init>(ColumnEntityAliases.java:45)
at org.hibernate.loader.custom.sql.SQLQueryReturnProcessor.generateCustomReturns(SQLQueryReturnProcessor.java:197)
at org.hibernate.loader.custom.sql.SQLCustomQuery.<init>(SQLCustomQuery.java:152)
at org.hibernate.engine.query.NativeSQLQueryPlan.<init>(NativeSQLQueryPlan.java:67)
at org.hibernate.engine.query.QueryPlanCache.getNativeSQLQueryPlan(QueryPlanCache.java:140)
at org.hibernate.impl.AbstractSessionImpl.getNativeSQLQueryPlan(AbstractSessionImpl.java:160)
at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:165)
at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:179)
at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:236)

When I remove the @Formula attribute all works fine.

I found this bug report: BugReport. But for me it's not clear how to solve my problem.

Upvotes: 15

Views: 12266

Answers (3)

Ibrahim Darwiesh
Ibrahim Darwiesh

Reputation: 7

Simply way , don't use createNativeQuery , just use createQuery .. or make a transiant with getter convat

Upvotes: 0

Pascal Thivent
Pascal Thivent

Reputation: 570645

Indeed, this seems to be the problem reported in HHH-2225 (that HHH-2536 duplicates). Unfortunately, the issue is not fixed and I'm afraid you'll have to either use HQL or submit a patch (you can start with voting on the issue but I wouldn't expect a fast resolution given that this issue is almost four years old).

Upvotes: 5

Andy
Andy

Reputation: 1143

We could use currentSession.createQuery() instead of currentSession.createSQLQuery(). The query will be slightly different.

http://docs.jboss.org/hibernate/core/3.6/reference/en-US/html/queryhql.html#queryhql-subqueries

Upvotes: 0

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