Security Requirements and Controls
API Stability Long-Term

The updateFile() GraphQL mutation may be used to change a file in LogScale.

For information on loading and using files, see the Lookup Files documentation page.

Syntax

Below is the syntax for the updateFile() mutation field:

graphql
updateFile(
     fileName: string!,
     name: string!,
     changedRows: [[string]!,
     headers: [string]!,
     columnChanges: [ColumnChange]!,
     limit: integer,
     offset: integer,
     labels: [string]
   ): UploadedFileSnapshot!

Below is an example of how this mutation field might be used:

Raw
graphql
mutation {
  updateFile( 
       fileName: "somefile.csv",
       name: "humio",
       changedRows: [ "some", "thing"],
       headers: [ "my-header" ],
       columnChanges: [ { changeKind: Remove, index: 1 } ]
  )
  { lines }
}
Mac OS or Linux (curl)
shell
curl -v -X POST $YOUR_LOGSCALE_URL/graphql \
    -H "Authorization: Bearer $TOKEN" \
    -H "Content-Type: application/json" \
    -d @- << EOF
{"query" : "mutation {
  updateFile( 
       fileName: \"somefile.csv\",
       name: \"humio\",
       changedRows: [ \"some\", \"thing\"],
       headers: [ \"my-header\" ],
       columnChanges: [ { changeKind: Remove, index: 1 } ]
  )
  { lines }
}"
}
EOF
Mac OS or Linux (curl) One-line
shell
curl -v -X POST $YOUR_LOGSCALE_URL/graphql \
    -H "Authorization: Bearer $TOKEN" \
    -H "Content-Type: application/json" \
    -d @- << EOF
{"query" : "mutation {
  updateFile( 
       fileName: \"somefile.csv\",
       name: \"humio\",
       changedRows: [ \"some\", \"thing\"],
       headers: [ \"my-header\" ],
       columnChanges: [ { changeKind: Remove, index: 1 } ]
  )
  { lines }
}"
}
EOF
Windows Cmd and curl
shell
curl -v -X POST $YOUR_LOGSCALE_URL/graphql ^
    -H "Authorization: Bearer $TOKEN" ^
    -H "Content-Type: application/json" ^
    -d @'{"query" : "mutation { ^
  updateFile(  ^
       fileName: \"somefile.csv\", ^
       name: \"humio\", ^
       changedRows: [ \"some\", \"thing\"], ^
       headers: [ \"my-header\" ], ^
       columnChanges: [ { changeKind: Remove, index: 1 } ] ^
  ) ^
  { lines } ^
}" ^
} '
Windows Powershell and curl
powershell
curl.exe -X POST 
    -H "Authorization: Bearer $TOKEN"
    -H "Content-Type: application/json"
    -d '{"query" : "mutation {
  updateFile( 
       fileName: \"somefile.csv\",
       name: \"humio\",
       changedRows: [ \"some\", \"thing\"],
       headers: [ \"my-header\" ],
       columnChanges: [ { changeKind: Remove, index: 1 } ]
  )
  { lines }
}"
}'
    "$YOUR_LOGSCALE_URL/graphql"
Perl
perl
#!/usr/bin/perl

use HTTP::Request;
use LWP;

my $TOKEN = "TOKEN";

my $uri = '$YOUR_LOGSCALE_URL/graphql';

my $query = "mutation {
  updateFile( 
       fileName: \"somefile.csv\",
       name: \"humio\",
       changedRows: [ \"some\", \"thing\"],
       headers: [ \"my-header\" ],
       columnChanges: [ { changeKind: Remove, index: 1 } ]
  )
  { lines }
}";
$query =~ s/\n/ /g;
my $json = sprintf('{"query" : "%s"}',$query);
my $req = HTTP::Request->new("POST", $uri );

$req->header("Authorization" => "Bearer $TOKEN");
$req->header("Content-Type" => "application/json");

$req->content( $json );

my $lwp = LWP::UserAgent->new;

my $result = $lwp->request( $req );

print $result->{"_content"},"\n";
Python
python
#! /usr/local/bin/python3

import requests

url = '$YOUR_LOGSCALE_URL/graphql'
mydata = r'''{"query" : "mutation {
  updateFile( 
       fileName: \"somefile.csv\",
       name: \"humio\",
       changedRows: [ \"some\", \"thing\"],
       headers: [ \"my-header\" ],
       columnChanges: [ { changeKind: Remove, index: 1 } ]
  )
  { lines }
}"
}'''

resp = requests.post(url,
                     data = mydata,
                     headers = {
   "Authorization" : "Bearer $TOKEN",
   "Content-Type" : "application/json"
}
)

print(resp.text)
Node.js
javascript
const https = require('https');

const data = JSON.stringify(
    {"query" : "mutation {
  updateFile( 
       fileName: \"somefile.csv\",
       name: \"humio\",
       changedRows: [ \"some\", \"thing\"],
       headers: [ \"my-header\" ],
       columnChanges: [ { changeKind: Remove, index: 1 } ]
  )
  { lines }
}"
}
);


const options = {
  hostname: '$YOUR_LOGSCALE_URL',
  path: 'graphql',
  port: 443,
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Content-Length': data.length,
    Authorization: 'BEARER ' + process.env.TOKEN,
    'User-Agent': 'Node',
  },
};

const req = https.request(options, (res) => {
  let data = '';
  console.log(`statusCode: ${res.statusCode}`);

  res.on('data', (d) => {
    data += d;
  });
  res.on('end', () => {
    console.log(JSON.parse(data).data);
  });
});

req.on('error', (error) => {
  console.error(error);
});

req.write(data);
req.end();
Example Responses
Success (HTTP Response Code 200 OK)
json
{
  "data": {
    "updateFile": {
      "lines": "4"
    }
  }
}

Given Datatypes

For ColumnChange, there are a couple of parameters that may be given. Below is a list of them along with a description of each:

Table: ColumnChange

ParameterTypeRequiredDefaultStabilityDescription
Some arguments may be required, as indicated in the Required column. For return datatypes, this indicates that you must specify which fields you want returned in the results.
Table last updated: Sep 17, 2024
changeKindColumnChangeKindyes Long-TermThe kind of column change. See ColumnChangeKind .
indexintegeryes Long-TermThe index of the column to change.

Returned Datatypes

The returned datatype UploadedFileSnapshot has several parameters. Below is a list of them along with a description of each:

Table: UploadedFileSnapshot

ParameterTypeRequiredDefaultStabilityDescription
Some arguments may be required, as indicated in the Required column. For return datatypes, this indicates that you must specify which fields you want returned in the results.
Table last updated: Sep 11, 2025
filterStringstring  Long-TermAny string on which to filter the data.
headers[string]yes Long-TermThe headers for the uploaded snapshot file.
limitintegeryes Long-TermThe file upload limit.
lines[string]yes Long-TermThe contents of the file in the form of a list of lines, with each line being itself a list of column values. When the file is empty or nothing matches filterString, then [] is returned.
nameAndPathFileNameAndPathyes Long-TermThe name and path of the uploaded snapshot file. See FileNameAndPath.
offsetintegeryes Long-TermThis is the offset supplied to a file query. For a new or updated file, this is always 0.
resourcestringyes Short-TermThe resource identifier for the file.
totalLinesCountlongyes Long-TermThe total number of lines in the uploaded snapshot file.