Using my log timestamp in logstash sample log (first-pipeline.conf)

Elastic Stack Logstash
3

Thanks, I am using the first-pipeline.conf as given on
https://www.elastic.co/guide/en/logstash/current/advanced-pipeline.html

input {
beats {
port => "5043"
}
}

filter {
grok {
match => { "message" => "%{COMBINEDAPACHELOG}"}
}

geoip {
    source => "clientip"
}

}

output {
elasticsearch {
hosts => [ "localhost:9200" ]
}
}

In filter section I am using "%{COMBINEDAPACHELOG} as given in example/doc, isn't it enough or do i need to make changes in filter { } section for each and every field, since it is Apache web Logs and logstash understand it the format and it believe it is enough