How to create multiple indices from multiple oracle databases?

@Shaoranlaos Thanks for the comment, to understand it better, do you mean to change current logstash.conf file input section like below,

input {
jdbc {
jdbc_connection_string => "jdbc:oracle:thin:@XXX:15210/XXX"
jdbc_user => "XXX"
jdbc_password => "XXX"
statement => "XXX"
jdbc_driver_library => "/usr/share/logstash/ojdbc7.jar"
jdbc_driver_class => "Java::oracle.jdbc.driver.OracleDriver"
}
jdbc {
jdbc_connection_string => "jdbc:oracle:thin:@YYY:15210/YYY"
jdbc_user => "YYY"
jdbc_password => "YYY"
statement => "YYY"
jdbc_driver_library => "/usr/share/logstash/ojdbc7.jar"
jdbc_driver_class => "Java::oracle.jdbc.driver.OracleDriver"
}
jdbc {
jdbc_connection_string => "jdbc:oracle:thin:@ZZZ:15210/ZZZ"
jdbc_user => "ZZZ"
jdbc_password => "ZZZ"
statement => "ZZZ"
jdbc_driver_library => "/usr/share/logstash/ojdbc7.jar"
jdbc_driver_class => "Java::oracle.jdbc.driver.OracleDriver"
}
}