passing a parameter in awk command won't work - bash

Question

I run the script bellow with ./command script.sh 11, the first line of code bellow stores the output (321) successfully in parameter x (checked with echo on line 2). On line 3 I try to use parameter x to retrieve the last two columns on all lines where the value in the first column is equal to x (in doc2.csv). This won't work but when I replace z=$x by z=321it works fine. Why won't this code work when passing the parameter?
#!/bin/bash
x="$(awk -v y=$1 -F\; '$1 == y' ~/Documents/doc1.csv | cut -d ';' -f2)"
echo $x
awk -v z=$x -F, '$1 == z' ~/Documents/doc2.csv | cut -d ',' -f2,3
doc1.csv (all columns have unique values)
33;987
22;654
11;321
...
doc2.csv
321,156843,ABCD
321,637253,HYEB
123,256843,BHJN
412,486522,HDBC
412,257843,BHJN
862,256843,BHLN
...

Answer 1

Like others have mentioned there is probably some extra characters coming along for the ride in field 2 of your cut command.
If you just use awk to print the column you want instead of the entire line and cutting that you shouldn't have any problems. If you still do then you will need to look into dos2unix.
n=33;
x=$(awk -v y=$n -F\; '$1 == y {print $2}' d1);
echo ${x};
awk -v z=$x -F, '$1 == z' d2
d1 and d2 contain doc1 and doc2 contents as you outlined.
As you can see all I did was stop using cut on the output of awk and just told awk to print the second field if the first field is equal to the input variable.
By the way awk is pretty powerful if you weren't aware... You can do this entire program within awk.
n=11; awk -v x=$n -F\; 'NR==FNR{ if($1==x){ y[$2]; } next} $1 in y{print $2, $3}' d1 <( sed 's/,/;/g' d2)
NR==FNR Is a trick that effectively says "If we are still in the first file, do this"... the key is not forgetting to use next to skip the rest of the awk command. Once we get to the second file FNR flips back to 1 but NR keeps incrementing up so they'll never be equal again.
So for the first file we just load up the second column values into an array where the first column matches our passed variable. You could optimize this since you said d1 was always unique lines.
So once we get into the next file the logic skips everything and runs $1 in y. This just checks if the first column is in the array we have created. If it is awk prints column 2 and 3.
<( sed 's/,/;/g' d2) just means we want to treat the output of the sed command as a file. The sed command is just converting the commas in d2 to semicolons so that it matches the FS that awk expects.
Hopefully you've learned a bit about awk, read more here http://www.catonmat.net/blog/ten-awk-tips-tricks-and-pitfalls/ and a great redirection cheat sheet is available here http://www.catonmat.net/download/bash-redirections-cheat-sheet.pdf .