I have the following csv file data:

D,00008,1423592,0000
D,00008,1423802,0000
D,00008,1423818,0000

1st column gets extracted correctly (D values)
2nd column gets extracted incorrectly (number 8 instead of string 00008)
3rd column get extracted correctly (since no trailing 0's)
4th column get extracted incorrectly (number 0 instead of string 0000)

How can I avoid data type conversion and keep all cells as string?