how to add parentheses and single quotes to bash string - mysql

Question

EDITED
I am trying to make some inserts in my mysql data base from a bash script. In this data base there are some varchar type arguments so I have to quote them when I make the query
I execute the query this way
mysql --user=**** --password=**** -e $ext dbname
I want to introduce in $ext the next text: insert into tname (string,int) values ('$var',$ivar)
The problem is that when I am trying to insert the parenthesis and the "'" they only put in the start of the string.
after I failed putting the example I will post parts of the code:
I get the datas from a file and store all the lines in myarray;
while IFS=$'\n' read -r line_data; do
myarray[i]="${line_data]"
((++i))
done < file.txt
and then in other while
somevar=${myarray[i++]}
var="'$somevar'"
echo $somevar
echo $var
Result:
Hello
'Hello

Answer 1

Your assignment syntax is incorrect. The $ is only used when referring to the variable, not when assigning it a value. Fix your assignment and it should work fine:
$ var=foo
$ ivar=23
$ ext="insert into tname (string,int) values ('$var',$ivar)"
$ echo $ext
insert into tname (string,int) values ('foo',23)
Now you can use it in your command like this:
mysql --user=**** --password=**** -e "$ext" dbname
There are a number of ways this could go wrong, depending on what characters are in the data you're trying to insert, and it might be easier to write to a file instead of a variable.

Answer 2

As #chepner have said it is becouse at getting the string it was a \r character at end of all strings so that strange thing happens
Delete the las character of all the strings
var=${myarray[i++]}
var=${var::-1}