check this input code,
input {
jdbc {
jdbc_driver_library => "C:/Users/xxxx/Downloads/mysql-connector-java-5.1.42.jar"
jdbc_driver_class => "com.mysql.jdbc.Driver"
jdbc_connection_string => "jdbc:mysql://localhost:3306/test"
jdbc_user => "root"
jdbc_password => "root"
statement => "SELECT * FROM SAMPLE"
jdbc_paging_enabled => "true"
jdbc_page_size => "50000"
}
}