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Split a content in a file with specific interval base on the delimited values using UNIX command


 
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# 1  
Old 09-28-2017
Split a content in a file with specific interval base on the delimited values using UNIX command

Hi All,


we have a requirement to split a content in a text file every 5 rows and write in a new file .

conditions:

if 5th line falls between center of the statement . it should look upto after ";"


files are below format:

Code:
1	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
2	WHERE EMP='121'
3	;
4	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
5	WHERE EMP='121'
6	;
7	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
8	WHERE EMP='121'
9	;
10	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
11	WHERE EMP='121'
12	;
13	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
14	WHERE EMP='121'
15	;
16	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
17	WHERE EMP='121'

Output needed:

file 1:
Code:
1	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
2	WHERE EMP='121'
3	;
4	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
5	WHERE EMP='121'
6	;

file 2:
Code:
UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
8	WHERE EMP='121'
9	;
10	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
11	WHERE EMP='121'
12	;

file 3:
Code:
UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
14	WHERE EMP='121'
15	;
16	UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS'
17	WHERE EMP='121'
18 :

Please dont print with line number, i make it as reference for your understanding.


Moderator's Comments:
Mod Comment Use code tags, thanks. Also please post such technical questions next time in the appropriate subforum, not the one to contact admins.

Last edited by KK230689; 09-28-2017 at 06:55 AM.. Reason: unix Shell scripting
# 2  
Old 09-28-2017
Welcome KK230689,

I have a few to questions pose in response first:-
  • Is this homework/assignment? There are specific forums for these.
  • What have you tried so far?
  • What output/errors do you get?
  • What OS and version are you using?
  • What are your preferred tools? (C, shell, perl, awk, etc.)
  • What logical process have you considered? (to help steer us to follow what you are trying to achieve)
  • Is your requirement actually that you want three statements per file? I might suggest csplit for that.
Most importantly, What have you tried so far?

There are probably many ways to achieve most tasks, so giving us an idea of your style and thoughts will help us guide you to an answer most suitable to you so you can adjust it to suit your needs in future.


We're all here to learn and getting the relevant information will help us all.



Kind regards,
Robin

Last edited by rbatte1; 09-28-2017 at 05:56 AM.. Reason: Correcting member name
This User Gave Thanks to rbatte1 For This Post:
# 3  
Old 09-28-2017
Code:
rm -f outfile_*

file_count=1
line_count=1

outfile="outfile_$file_count"

while read line
do
   echo "$line" >> $outfile
   (( line_count = line_count + 1 ))
   [[ $line_count -ge 5 ]] && { echo "$line" | grep -q "^ *; *$" && {
         (( file_count = file_count + 1 ))
         (( line_count = 1 ))
      }
      outfile="outfile_$file_count"
   }
done < input_file

This User Gave Thanks to rdrtx1 For This Post:
# 4  
Old 09-29-2017
Quote:
Originally Posted by rdrtx1
Code:
rm -f outfile_*

file_count=1
line_count=1

outfile="outfile_$file_count"

while read line
do
   echo "$line" >> $outfile
   (( line_count = line_count + 1 ))
   [[ $line_count -ge 5 ]] && { echo "$line" | grep -q "^ *; *$" && {
         (( file_count = file_count + 1 ))
         (( line_count = 1 ))
      }
      outfile="outfile_$file_count"
   }
done < input_file

This looks like it should work to me. Have you tested it? I don't think you need the echo "$line" | grep. If using ksh93 or bash 4 you could write:
Code:
[[ "${line}" =~ ";" ]] && [[ "${line_count}" -ge 5 ]] && {

Andrew
This User Gave Thanks to apmcd47 For This Post:

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