How to transfer data to elastic via logstash using analyzer?

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Elasticsearch

LogStash

I have a logstash config file below. Elastic is reading my data as a b where as i want it to read it as ab i found i need to use not_analyzed for my sscat filed and max_shingle_size , min_shingle_size for products field to get the best result.

Should I use not_analyzed for products field as well? Will that give better result?

How should I fill my my_id_analyzer to actually use the analyzer on different fields?

How should I connect the template with logstash config file?

What I have tried:

input{
    file{
    path => "path"
    start_position =>"beginning"

    }
}
filter{
    csv{
    separator => ","
    columns => ["Index", "Category", "Scat", "Sscat", "Products", "Measure", "Price", "Description", "Gst"]
    }
    mutate{convert => ["Index", "float"] }
    mutate{convert => ["Price", "float"] }
    mutate{convert => ["Gst", "float"] }

}
output{
    elasticsearch{
        hosts => "host"
        user => "elastic"
        password => "pass"
        index => "masterdb"
        }

}

Quote:

I also have a template that can do it for all the future files that i upload

curl user:pass host:"host" /_template/logstash-id -XPUT -d '{
    "template": "logstash-*",
    "settings" : {
        "analysis": {
            "analyzer": {
                "my_id_analyzer"{

                }
                }
            }
        }
    },
    "mappings": {
             "properties" : {
                "id" : { "type" : "string", "analyzer" : "my_id_analyzer" }
            }
        }

    }'