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Full Discussion: Dropping Records for unknown reason in awk script
Top Forums Shell Programming and Scripting Dropping Records for unknown reason in awk script Post 302366508 by mkastin on Friday 30th of October 2009 10:40:04 AM
Old 10-30-2009
Dropping Records for unknown reason in awk script
Hi,

I have written the following it is pretty sloppy but I don't see any reason why I should be losing 54 records from a 3.5 million line file after using it.

What I am doing:

I have a 3.5 million record file with about 80,000 records need a correction. They are missing the last data from an append because they didn't have a match. I need to insert defaulted data on these records. My script worked at intended, however I have 54 less output records than input records and I don't know why they were dropped.


Code:
#!/bin/ksh

myFile="${1}"
myOutput="${2}"

awk '{
 match_flag=substr($0,63,2);
 if (NR == 1) insert_data=substr($0,41,22);
 if (match_flag == "  ") {strt=substr($0,1,40); print strt insert_data "\ \ \ \ \ \ \ \ \ \ \ NM\ X";}
else print $0;}' "${myFile}" >> "${myOutput}"

Basically what I am doing is appending a long string a data to any records that are missing a value in position 3064-3065.

Since this file is soo large I can't really provide sample data but I'll attempt to reproduce a short version below.

Code:
INPUT:
0001  Ronald   McDonald  01 H81 0001256 0100111               V VEEEFKFS SP X
0002  Elmo     St. Elmo  02 H82 0089621  001  10 11 01 1      0000WWDFCWWSP X
0003  Cookie   Monster   01 H81 0887141    1  .  0   0  .  1  BBB000 QWFJSP X
0004  Tfer     Harris    04 H84 0985512 0000000000000000000000BBE00122933NM X
0005  Oscar    Grouche   03 H83 0364471                   110.VVMWEWGODWFDA X
0006  Dumb     Name      02 H82 0000233   111 00 1111 00000000F23202233FFDA X
0007  Butter   Face      04 H84 0014666 1111111111111111111111M012291122FDA X
0008  Ford     F150      01 H81 0000001 00111 110 110  0011 ..S1102234SSMSP X
0009  Bar      Foo       03 H83 7741668 0 1 0 1 0 1 0 1 0 1 0 P019441MEWEDA X
0010  ChoCho   Train     04 H84 0014669 1111111111111111111111POWA1224023OB X
0011  Stone    Stone     04 H84 0014566 1111111111111111111111M12301MANWEOB X
0012  Problem  Record    04 H84 0000000 

OUTPUT:
0001  Ronald   McDonald  01 H81 0001256 0100111               V VEEEFKFS SP X
0002  Elmo     St. Elmo  02 H82 0089621  001  10 11 01 1      0000WWDFCWWSP X
0003  Cookie   Monster   01 H81 0887141    1  .  0   0  .  1  BBB000 QWFJSP X
0004  Tfer     Harris    04 H84 0985512 0000000000000000000000BBE00122933NM X
0005  Oscar    Grouche   03 H83 0364471                   110.VVMWEWGODWFDA X
0006  Dumb     Name      02 H82 0000233   111 00 1111 00000000F23202233FFDA X
0007  Butter   Face      04 H84 0014666 1111111111111111111111M012291122FDA X
0008  Ford     F150      01 H81 0000001 00111 110 110  0011 ..S1102234SSMSP X
0009  Bar      Foo       03 H83 7741668 0 1 0 1 0 1 0 1 0 1 0 P019441MEWEDA X
0010  ChoCho   Train     04 H84 0014669 1111111111111111111111POWA1224023OB X
0011  Stone    Stone     04 H84 0014566 1111111111111111111111M12301MANWEOB X
0012  Problem  Record    04 H84 0000000 0000000000000000000000           NM X

File is fixed length no delimiters.
Last edited by mkastin; 11-02-2009 at 11:28 AM.. Reason: Fixing all examples and adujusting code to fit examples properly.
 

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