Hibernate hbm2java and generated BigDecimal from MySQL decimal(10,2) type

Demetrio Filocamo — Mon, 02 Feb 2009 12:19:12 +0000

I had a little problem while working on a JBoss Seam project: I used the MySQL decimal(10,2) type for price value but, while running seam tests, the hbm2ddl schema validator gave me this error:

Caused by: org.hibernate.HibernateException: Wrong column type: shippingCost, expected: numeric(10,0)
[testng]     at org.hibernate.mapping.Table.validateColumns(Table.java:261)
[testng]     at org.hibernate.cfg.Configuration.validateSchema(Configuration.java:1083)
[testng]     at org.hibernate.tool.hbm2ddl.SchemaValidator.validate(SchemaValidator.java:116)
[testng]     at org.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:317)
[testng]     at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1294)
[testng]     at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:918)
[testng]     at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:656)
[testng]     … 68 more

The problem is that hbm2java usa a wrong column definition for the entity property, in fact the @Column annotation on the property was:

@Column(name = “shippingCost”, nullable = false, precision = 10)

The solution is simple, just change it to:

@Column(name = “shippingCost”, nullable = false, precision = 10, scale=2, columnDefinition=”decimal(10,2)”)

Now the type is correctly defined and the schema validator doesn’t return any error.

Demetrio

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Hibernate hbm2java and generated BigDecimal from MySQL decimal(10,2) type