input {
    jdbc {
        jdbc_connection_string => "jdbc:mysql://localhost:3306/elements"
        jdbc_user => "user"
        jdbc_password => "admin"
        jdbc_validate_connection => true
        jdbc_driver_library => "C:/work/Wildfly/wildfly-9.0.2.Final/modules/com/mysql/main/mysql-connector-java-5.1.36.jar"
        jdbc_driver_class => "com.mysql.jdbc.Driver"
        statement_filepath => "query.sql"
        use_column_value => true
        tracking_column => id
        #schedule => "*/3 * * * *"
        clean_run => true

    }
}

output {
    elasticsearch {
        index => "emptytest"
        document_type => "history"
        document_id => "%{id}"
        hosts => "localhost"
    }
}

if [sourcecell_id] == "NULL" {

         mutate {

         }
    }

filter {
     ruby {
                code => "
                        hash = event.to_hash
                        hash.each do |k,v|
                                if v == nil
                                        event.remove(k)
                                end
                        end
                "
        }

}

filter {
     ruby {
                code => "
                        hash = event.to_hash
                        hash.each do |k,v|
                                if v == nil
                                        event[k] = 0
                                end
                        end
                "
        }

}

ERROR logstash.filters.ruby - Ruby exception occurred: Direct event field references (i.e. event['field'] = 'value') have been disabled in favor of using event get and set methods (e.g. event.set('field', 'value')). Please consult the Logstash 5.0 breaking changes documentation for more details