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awk in UNIX to split a file based on change in field of header records and group them into files. TRU64 IBM UX

Need an awk or sed command which will split a file based on a change of PO number in the HDR record.


If /^HDR/ evaluate expression from position 47 through 57.  
     If expression in 47 through 57 is unchanged when compared with last HDR, keep record with the last HDR850 and DET grouping.
     If expression in 47 through 57 changes from last HDR split to a new file.

For example a file contains multiple HDR records, grouped on the field beginning in position 47.  Group the HDR and associated DET records together by PO number contained int the field at postion 47.

(file1)
HDR850                              VPD        C20731589
DET0001
DET0002
DET0003
HDR850                              VPD        C20731589
DET0001
DET0002
DET0003
(file2)
HDR850                              VPD        C20731590
DET0001
DET0002
DET0003
(file3)
HDR850                              VPD        C20731591
DET0001
DET0002
DET0003
0
eshapley
Asked:
eshapley
  • 2
1 Solution
 
ozoCommented:
awk '/^HDR/{file=substr($0,47,11)}{print >>file}'
0
 
ahoffmannCommented:
# same as ozo's solution but more lazy
gawk '/^HDR/{f=$NF}{print > f}'

IIRC, traditional AT&T awk does not support "print >file", hence gawk
0
 
eshapleyAuthor Commented:
First tried:
/fdmdev/edi-imp>awk `/^HDR/{ProEDI.SHP=substr($0,47,11)}{print>>ProEDI.SHP}`
ksh: 0403-057 Syntax error: `(' is not expected.
/fdmdev/edi-imp>

Next tried:
awk `/^HDR/{ProEDI.DSH=substr($0,47,11)} {print>>/fdmdev/edi-imp/splitfiles1/proedi.dsh1}

error:
ksh: 0403-057 Syntax error: `(' is not expected.

I tried this command:
awk 'BEGIN { i=0 } /^HDR/ {file=substr($0,47,11)} {++i} { print > "/fdmdev/edi-imp/splitfiles1/ProEDI.DSH."(i) }' /fdmdev/edi-imp/ProEDI.DSH

It ran, but created a new file for every record regardless of whether the record began with HDR or DET.  I need it to create a separate file only when the record is HDR and the PO number in that record changes.
0
 
ozoCommented:
you used ` where you should have used '
0
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