Sort Elasticsearch output in Logstash

[Nikopoulos (Konstantinos Nikopoulos)]

I have 2 logstash pipelines. The first one uploads log lines in elasticsearch using csv filter. These are the columns [timestamp,machine,application]. The other pipeline gets data from elasticsearch, sorts them by timestamp and exports them to csv.
The only thing that doesn't work is sorting.

First pipeline:

input {
    beats {
        port => "5044"
    }
}
filter {
    if "messages" in [tags] {
        grok {
            match => { "message" => "%{MONTH:month} +%{MONTHDAY:day} %{TIME:time} %{SYSLOGHOST:machine} %{DATA:application}: %{GREEDYDATA:msg}"}
        }
        mutate {
            add_field => {
                "temp" => "%{month} %{day} %{time} 2020"
            }
            remove_field => ["month","day","time"]
        }    
        date{
            match => [ "temp", "MMM d HH:mm:ss yyyy"]
            target => "logdate"
        }
        ruby{
            code =>'event.set("timestamp", event.get("logdate").to_i)'
        }
    }
    csv {
        add_field =>{
            "timestamp" => "%{timestamp[0]}"
            "machine" => "%{machine[0]}"
            "application" => "%{application}"
        }
    }
}
output {
    elasticsearch {
        hosts => ["localhost:9200"]
        index => "%{[@metadata][beat]}-%{[@metadata][version]}-%{+YYYY.MM.dd}"
    }
}

Second pipeline:

input {
    elasticsearch {
        hosts => "localhost"
    }
}
filter {
    elasticsearch {
        hosts => "localhost"
        index => "*"
        query => '{ "query": { "query_string": { "query": "*" } } }'
        sort => "timestamp:desc"
   }
    mutate {
        convert => {
            "lat" => "float"
            "lon" => "float"
            "weight" => "float"
        }
    }
}
output {
    csv {
        fields => ["timestamp","machine","application"]
        path => "output/output.csv"
    }
}

I don't know how to syntax elasticsearch input plugin and elasticsearch filter plugin to accomplish sorting.