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Full Discussion: Check for not null column in a pipe delimited file
Top Forums UNIX for Dummies Questions & Answers Check for not null column in a pipe delimited file Post 302974890 by Don Cragun on Sunday 5th of June 2016 03:57:45 PM
Old 06-05-2016
Quote:
Originally Posted by stomp
Hi,

Something like this:

Code:
awk -F'|' '{ 
   if( $3=="" || $5=="" || $7=="" || $8=="" ) 
         if ( $3=="" ) { print "Line ",NR, " Field 3: Mandatory field is null"; }
         if ( $5=="" ) { print "Line ",NR, " Field 5: Mandatory field is null"; }
         # ...
   else  
         do_something ; 
}' yourfile.txt

I think you're missing a pair a braces:
Code:
awk -F'|' '{ 
   if( $3=="" || $5=="" || $7=="" || $8=="" ) {
         if ( $3=="" ) { print "Line ",NR, " Field 3: Mandatory field is null"; }
         if ( $5=="" ) { print "Line ",NR, " Field 5: Mandatory field is null"; }
         # ...
   } else  
         do_something ; 
}' yourfile.txt

Without them, your code will execute the else clause only if the last last field tested is an empty string and, if the 1st if test does not find any empty strings, the remaining if tests will never succeed either:
Code:
awk -F'|' '{ 
   if( $3=="" || $5=="" || $7=="" || $8=="" ) { 
         if ( $3=="" ) { print "Line ",NR, " Field 3: Mandatory field is null"; }
   }
   if ( $5=="" ) { { print "Line ",NR, " Field 5: Mandatory field is null"; }
   # ...
   } else  
         do_something ; 
}' yourfile.txt

And, of course, if do_something; is more than one statement, you'll also needed braces around all statements in the else clause. The braces around your print statements don't hurt anything, but aren't strictly required since only one statement is being executed in those if then clauses.
This User Gave Thanks to Don Cragun For This Post:
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