CODEWITHSUNDEEP
linuxshell
Ravi
Ravi

Reputation: 3303

Creating an expression with equal to in shell script

I am trying a FOR loop in Linux Shell script to generate a condition to be passed on to a SQL query within the shell script. The following is the portion that is giving error:

    > condition=${primarykey//,/ }
    > echo $condition
      cond1 cond2

    > temp=""

    > for i in $condition
    > do
    >   $temp="${temp}c.${i}\=s.${i} AND "
    > done

I am looking for the following expression to be generated:

    > echo $temp
      c.cond1=s.cond1 AND c.cond2=s.cond2

However, I get the following error:

    ./script.sh: line 28: =c.cond1\=s.cond1 AND : command not found
    ./script.sh: line 28: =c.cond2\=s.cond2 AND : command not found

Could someone help me with the right way to get this expression?

Upvotes: 0

Views: 47

Answers (2)

Ponmani Palanisamy
Ponmani Palanisamy

Reputation: 78

This would do it.

temp=""           
for i in $condition
do
       temp="$temp c.$i=s.$i AND "
done

Upvotes: 1

Ignacio Vazquez-Abrams
Ignacio Vazquez-Abrams

Reputation: 799200

The $ implies substitution. As in, take the contents of the variable and substitute it into the command line at that point. If you want to assign then you must not substitute.

TL;DR: Remove the dollar sign to the left of the equals sign.

Upvotes: 1

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