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Full Discussion: Find Null values in Columns and fail execution by displaying error message
Top Forums UNIX for Dummies Questions & Answers Find Null values in Columns and fail execution by displaying error message Post 302940530 by tpk on Tuesday 7th of April 2015 05:08:42 AM
Old 04-07-2015
Linux
Hi All,

Can any one help me with the code to achieve the requirement I am trying to achieve which I mentioned in Post 1

The script will loop through all files that start with pf_YYYYMMDD.csv files and remove the header and trailer record in each iteration and create a temp file with same name as of the original file name but with .tmp extension.

Now I am trying to check for any null values in Column 2 and Column 3 and trying to assign 102 or 103 value if either of the column value is null in any row.

After that i check for the value that is coming from the variable $value in the IF condition and if it matches then print simple echo message remove the .tmp file and exit the job with out further processing for next files in the loop. If there are no null values in the file for which it is processing it will go to else part and print "All records are good".

The above explained is what the script will be doing, but even though as you can see below in the file though there are null values present in column 2 and column 3 at row number 3,6,8 it is printing all records are good.

Please help me how can I check for null values and exit the script execution with out further processing. Please help me.
Test file name: pf_20120406.tmp
Code:
D,xsn,des,1.23,3.43,34.9203,234.23423,12.345,234.987,987.342,789.345,679.0987,345.657,345.987,987.098
D,xsn,des,1.23,3.43,34.9203,234.23423,12.345,234.987,987.342,789.345,679.0987,345.657,345.987,987.098
D,,,1.23,3.43,34.9203,234.23423,12.345,234.987,987.342,789.345,679.0987,345.657,345.987,987.098
D,xsn,des,1.23,3.43,34.9203,234.23423,12.345,234.987,987.342,789.345,679.0987,345.657,345.987,987.098
D,xsn,des,1.23,3.43,34.9203,234.23423,12.345,234.987,987.342,789.345,679.0987,345.657,345.987,987.098
D,,des,1.23,3.43,34.9203,234.23423,12.345,234.987,987.342,789.345,679.0987,345.657,345.987,987.098
D,xsn,des,1.23,3.43,34.9203,234.23423,12.345,234.987,987.342,789.345,679.0987,345.657,345.987,987.098
D,xsn,,1.23,3.43,34.9203,234.23423,12.345,234.987,987.342,789.345,679.0987,345.657,345.987,987.098

With Regards,
TPK

---------- Post updated at 04:08 AM ---------- Previous update was at 12:00 AM ----------

Hi All,

Find after lot of trials with different combinations, I resolved my issue and my script is working as expected.

PFB the correct code snippet

Code:
#!/usr/bin/sh
#filename=`ls -ltr /var/datastage/FRPDEVL/work/source/landing/dspf/pf_*.csv`
#
for fname in /var/datastage/FRPDEVL/work/source/landing/dspf/pf_*.csv;do
filename=`basename $fname`
fdate=`echo $filename|tr -dc '[:digit:]'`

  #Validation 1: Column B and C should not have a null value they are of varchar type.
  if [ $filename = 'pf_'$fdate'.csv' ]
  then
  echo "------------------------------------------------------------------------------------"
  echo "Checking Specific Validations 1 for File: pf_$fdate.csv"
  echo "------------------------------------------------------------------------------------"
  sed '1d;$d' pf_$fdate.csv >pf_$fdate.tmp
  val=`cat pf_$fdate.tmp|awk -F, '$2=="" || $3=="" {print "1"}'|wc -l`
  if (( "$val" >= "1" ))
  then
  echo $val" Null value present in file. Hence exiting the Job"
  rm -f pf_$fdate.tmp
  exit 16  
  else
  echo "All records are good"  
  fi  
  echo "------------------------------------------------------------------------------------"
  echo "Specific Validations check for File: pf_$fdate.csv completed"
  echo "------------------------------------------------------------------------------------"  
  fi
  
done

Thank you all for your help.

With Regards,
TPK.
 

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