I have statement like this

column_id.columnname=="value"

in unix i want to modify above statement to

variable1=="value"

that means i have to replace the string before "==" by string "variable1"
second catch is, in statement instead of "==" you can have any arithmatic comarision operator like !=, >, < etc...

can have replace string befor first " and replace by variable1==

can anyone suggest command to do this...

regards
mahabunta

echo variable1`expr match 'column_id.columnname=="value"' '.*\(==.*\)'`

hi i have

statement 15_REC_D>=5

here 15_REC_D needs to be replaced by `echo $line_by_line | awk -F "|" '{print $1}'`

so i have used command
echo -e "15_REC_D>=5" | sed 's/"15_REC_D"/"\`echo $line_by_line | awk -F "|" '{print $1}'\`"/g'

but it is giving me error as
sed: -e expression #1, char 58: Unterminated `s' command

Any inputs on above error

thanks and regards
mahabunta

The problem would depend a great deal on what the output of that command is.

the output should be

`echo $line_by_line | awk -F "|" '{print $1}'`>=5

thanks and regards
mahabunta

here's a simple python alternative:
output:
`echo $line_by_line | awk -F "|" '{print $1}'` >= 5