Elasticsearch float and double values

Elastic Stack Elasticsearch
1

Hello

I have a data like this

Doctors_Name Patient_Age Patients_Sex Dose Patient_Is_Alive
Wilson 65 Female 40.5 TRUE
Jamison 23 Male 60.7 TRUE
Thompson 62 Male 60.7 TRUE
Paulson 19 Female 400 TRUE
Daniels 27 Female 60.6 FALSE
Allison 84 Male 40 FALSE
Wilkes 46 Male 60 TRUE
Hamilton 86 Male 40 FALSE
Allison 27 Female 40 TRUE
Wilson 66 Female 60 FALSE
Hamilton 85 Male 40 TRUE
Daniels 74 Male 60 FALSE
Thompson 78 Female 40 TRUE
Hamilton 24 Male 60 FALSE
Hamilton 62 Male 60 TRUE
Wilson 59 Female 40 FALSE
Wilkes 39 Male 60 TRUE
Thompson 41 Male 40 TRUE
Daniels 64 Female 60 TRUE
Hamilton 58 Male 40 TRUE
Hamilton 58 Male 40 TRUE

And i need to get all unique values for dose(Float).

{:query=>{:match_all=>{}}, :facets=>{"dose"=>{:terms=>{:size=>50000, :order=>nil, :field=>"dose"}}}}

it returns:

"terms"=>[
{"term"=>40.0, "count"=>8},
{"term"=>60.0, "count"=>6},
{"term"=>60.70000076293945, "count"=>2},
{"term"=>40.012123107910156, "count"=>2},
{"term"=>400.0, "count"=>1},
{"term"=>60.599998474121094, "count"=>1},
{"term"=>40.5, "count"=>1}
]

Why this happens ? Is there a way in elasticsearch to display original values ?

I also try to use script:

{:query=>{:match_all=>{}}, :facets=>{"dose"=>{:terms=>{:size=>50000, :order=>nil, :script=>"_source.dose"}}}}

It works fine:

"terms"=>[
{"term"=>"40.0", "count"=>8},
{"term"=>"60.0", "count"=>6},
{"term"=>"60.7", "count"=>2},
{"term"=>"40.0", "count"=>2},
{"term"=>"60.6", "count"=>1},
{"term"=>"400.0", "count"=>1},
{"term"=>"40.5", "count"=>1}
]

But it takes very long time if i have a lot of records (

Can you help me please?

Thanks