Data In the CSV file with Column name 'P' nad value in it : Column Name = P Value in it = D12345
And in the Request Body it is taking as = %22D12345%09%22 and in UI in the field it is showing as ="D12345 "
It seems that the data in CSV file has certain characters which are being percent-encoded, according to the table:
%22
- is "
character%09
is a horizontal tab (tabulation character)So
if you don't want the characters to be present in the request body - remove them from the CSV file.
if you want the characters to be present in the request body but in their original form - go for __urldecode() function, see Apache JMeter Functions - An Introduction article to learn more about JMeter Functions concept.
or disable the encoding in the HTTP Request sampler