title: Specify columnsHaveTypes to import data from csv files into Mongodb and specify one field as string
body: <p>I have one csv which have data in below format</p>
  <pre><code>Mobile,Address
  1234567890,My address
  1234567891,My address
  1234567892,My address
  +911234567893,My address
  +911234567894,My address
  </code></pre>
  <p>When I import data into mongodb using below command then + is getting removed from mobile column because mongoimport is inserting mobile as NumberLong.</p>
  <pre><code>mongoimport --db test -c testcoll  --type csv --file test.csv --headerline
  </code></pre>
  <p>But I want to insert the data as it is. SO I tried to store it as string using below command</p>
  <pre><code>mongoimport --db test -c testcoll  --type csv --columnsHaveTypes --fields \&quot;Mobile.string()&quot;\ --file test.csv --headerline
  </code></pre>
  <p>But above command  is not working.</p>
  <p>Note: I only want to change data type for mobile column . Other column will be inserted as per mongoimport default behaviour</p>