Append next line to previous line when one pattern not found


 
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# 1  
Old 09-07-2011
Append next line to previous line when one pattern not found

Hi,
I need help for below scenario.I have a flat file which is having records seperated by delimiters which will represent each record for oracle table.My Control file will consider each line as one record for that table. Some of the lines are aligned in two/three lines so that records are rejected by scripts.
I need help to align the data as expected.

Input will be like below:
Code:
PC111111^|test1^|....   ->Line1-Its inserted corretly
PC222222^|test2^|
asdgasdgaj^|                ->Line2 seperated into two records so its considered as bad record.

Please help me with command that will append next line with previous line if PCXXXXXX pattern is not found as first word in each line.

I have tried with
Code:
sed -e :a -e '$!N;s/\n[^PC]//;ta' -e 'P;D'

But its not appending if the next line starts with "P","^" and "C".Smilie

Any inputs are greatly appreciated.Smilie

Last edited by Franklin52; 09-08-2011 at 08:07 AM.. Reason: Please use code tags for code and data samples, thank you
# 2  
Old 09-07-2011
try this:
Code:
awk '/^PC/{a[NR]=$0}!/^PC/{a[NR-1]=a[NR-1]$0}END{for(i=0;i<NR;i++){print a[i]}}' file

# 3  
Old 09-08-2011
Thanks Kato. Its working fine.
# 4  
Old 09-12-2011
Alternatively, as you initially thought, sed proves more concise:
Code:
 sed '/^PC/{N;/\nPC/!{s/\n//};P;D}' file


Last edited by kato; 09-12-2011 at 07:18 PM.. Reason: forgot to handle last line or odd lines
# 5  
Old 09-12-2011
Another concise one-liner using Perl -

Code:
$
$ cat -n f20
     1  PC111111^|test1^|....   ->Line1-Its inserted corretly
     2  PC222222^|test2^|
     3  asdgasdgaj^|
     4  gjeucowkje^|
     5  wwwdixoeum^|
     6  PC333333^|test2^|
     7  PC444444^|test2^|
     8  fjaldkdjgk^|
     9  PC555555^|test2^|
$
$ perl -0pe 's/\n([^PC])/$1/g' f20
PC111111^|test1^|....   ->Line1-Its inserted corretly
PC222222^|test2^|asdgasdgaj^|gjeucowkje^|wwwdixoeum^|
PC333333^|test2^|
PC444444^|test2^|fjaldkdjgk^|
PC555555^|test2^|
$
$

tyler_durden
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