Validation failed for query for method public abstract java.util.List net.javabelazy.service.SpringQueryExample.findByAuthor(java.lang.String)!

Error :

java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List net.javabelazy.service.SpringQueryExample.findByAuthor(java.lang.String)!

Solution : 

@Query(value = "your sql query ", nativeQuery = true)