Home JBoss howto Persistence - Database How to choose which column to update with EJB CMP ?
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How to choose which column to update with EJB CMP ?
Written by Mark S.   
JBoss recipe of the day
If you need to select which columns need update when executing a CMP statement you might use the "updatable" attribute on the @Column annotation.
Setting "updatable" = false will assume that the column is not always included in the SQL update statement.

@Column(name="colname" updatable="false")

At the moment this feature is available only with TopLink JPA.

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