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@stomp:
You cannot use !$i or for example!$3 as a test, since then the condition will also become true if the field equals 0 rather than "" (null value).
Last edited by Scrutinizer; 06-05-2016 at 07:41 AM..
These 2 Users Gave Thanks to Scrutinizer For This Post:
hi,
How can I check for a field in a pipe-delimited file having a NULL value in Unix using a grep command or any other command.
Please reply (5 Replies)
Hi All,
I have a table with 10 columns. Some columns(2nd,4th,5th,7th,8th and 10th) are Not Null columns. I'll get a tab-delimited file and want to check col by col and generate seperate error code for each col eg:102 if 2nd col value is NULL and 104 if 4th col value is NULL so on... I am a... (7 Replies)
Hi:
I have a text file date(pipe delimited) which is loaded in to the DB using sql loader(&CTL files) after some initial validation by the shell script.
Now i have a situation where the shell script needs to check a column in the text file and if it is NULL then it needs send this record/row... (12 Replies)
Hi,
I have a pipe delimited txt file which contains 17 fields per line/row.
16th field contains email id. I want to count the number of lines/rows that contains null in the 16th field.
Plz find attached example data file.
I'm looking for a command line/script which achieves this.
... (5 Replies)
hi,
I have pipe delimited flat file as below
1|ab|4.5|9|
2|ac|3|12|
3|ac|4.5|8|
i want to show (display) only 3rd field between pipes.
please help (1 Reply)
Hi,
I am trying to find the lines in a pipe delimited file where 11th column has not null values. Any help is appreciated. Need help asap please.
thanks in advance. (3 Replies)
Hi All,
I have a large dat file where each lines are pipe delimited values. I need to parse the file depending on the request. For example: sometimes I have told to remove all the values in the 7th column (this case remove values '3333' only from the first line and '3543' from the second line)... (4 Replies)
Hi,
I have a pipe delimited file as below and I need to replace the 2nd column of each line with null values.
1|10/15/2011|fname1|lname1
2|10/15/2012|fname2|lname2
3|10/15/2013|fname3|lname3
Output file:
1||fname1|lname1
2||fname2|lname2
3||fname3|lname3
I tried this
... (2 Replies)
I have an input file as below
Emp1|FirstName|MiddleName|LastName|Address|Pincode|PhoneNumber
1234|FirstName1|MiddleName2|LastName3| Add1 || ADD2|123|000000000
Output :
1234|FirstName1|MiddleName2|LastName3| Add1 ,, ADD2|123|000000000
OR
1234,FirstName1,MiddleName2,LastName3, Add1 ||... (2 Replies)
Discussion started by: styris
2 Replies
LEARN ABOUT DEBIAN
io_pipe
io_pipe(3) Library Functions Manual io_pipe(3)NAME
io_pipe - create a Unix pipe
SYNTAX
#include <io.h>
int io_pipe(int64 pfd[2]);
DESCRIPTION
io_pipe creates a new UNIX ``pipe.'' The pipe can receive data and provide data; any bytes written to the pipe can then be read from the
pipe in the same order.
A pipe is typically stored in an 8192-byte memory buffer; the exact number depends on the UNIX kernel. Bytes are written to the end of the
buffer and read from the beginning of the buffer. Once a byte has been read, it is eliminated from the buffer, making space for another
byte to be written; readers cannot ``rewind'' a pipe to read old data. Once 8192 bytes have been written to the buffer, the pipe will not
be ready for further writing until some of the bytes have been read. Once all the bytes written have been read, the pipe will not be ready
for further reading until more bytes are written.
io_pipe sets d[0] to the number of a new descriptor reading from the pipe, and sets d[1] to the number of a new descriptor writing to the
pipe. It then returns 1 to indicate success. If something goes wrong, io_pipe returns 0, setting errno to indicate the error; in this case
it frees any memory that it allocated for the new pipe, and it leaves d alone.
SEE ALSO io_readfile(3), io_createfile(3), io_socketpair(3)io_pipe(3)