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Full Discussion: Reading a string and passing passing arguments to a while loop
Top Forums Shell Programming and Scripting Reading a string and passing passing arguments to a while loop Post 302590176 by goddevil on Saturday 14th of January 2012 01:48:00 PM
Old 01-14-2012
Quote:
Originally Posted by agama
Code:
awk -F : -v last=${STOP:-0} -v first=${START:-0} '
    /^#/ { next; }
    NR >= first && (last == 0  || NR <= last) {
        print $1, $2, $3, $0
    }
 
' input-file | while read f1 f2 f3 i
do
        echo "first field: $f1"
        echo "second field $f2"
        echo "third field $f3"
        echo "whole record (i) $i"
done

Thanks Agama. Having tried the code above, i am getting an EOF error. Can you please explain what the awk is doing and if the format of the code is correct? I am getting the following error
Quote:
unexpected EOF while looking for matching `"'
---------- Post updated at 06:48 PM ---------- Previous update was at 05:36 PM ----------

Hi Agama,

I am unfamiliar with the syntax of the belwo code that you provided. I am getting an error from the code. Can you please let me know if the format of the code is correct? Thanks in advance.

Code:
awk -F : -v last=${STOP:-0} -v first=${START:-0} '
    /^#/ { next; }
    NR >= first && (last == 0  || NR <= last) {
        print $1, $2, $3, $0
    }
 
' input-file | while read f1 f2 f3 i
do

 

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LEARN ABOUT NETBSD

start_transaction

START 
TRANSACTION(7)						   SQL Commands 					      START TRANSACTION(7)

NAME

       START TRANSACTION - start a transaction block

SYNOPSIS

       START TRANSACTION [ transaction_mode [, ...] ]

       where transaction_mode is one of:

	   ISOLATION LEVEL { SERIALIZABLE | REPEATABLE READ | READ COMMITTED | READ UNCOMMITTED }
	   READ WRITE | READ ONLY

DESCRIPTION

       This  command begins a new transaction block. If the isolation level or read/write mode is specified, the new transaction has those charac-
       teristics, as if SET TRANSACTION [set_transaction(7)] was executed. This is the same as the BEGIN [begin(7)] command.

PARAMETERS

       Refer to SET TRANSACTION [set_transaction(7)] for information on the meaning of the parameters to this statement.

COMPATIBILITY

       In the standard, it is not necessary to issue START TRANSACTION to start a transaction block: any SQL command implicitly  begins  a  block.
       PostgreSQL's  behavior can be seen as implicitly issuing a COMMIT after each command that does not follow START TRANSACTION (or BEGIN), and
       it is therefore often called ``autocommit''.  Other relational database systems might offer an autocommit feature as a convenience.

       The SQL standard requires commas between successive transaction_modes, but for historical reasons PostgreSQL allows the commas to be  omit-
       ted.

       See also the compatibility section of SET TRANSACTION [set_transaction(7)].

SEE ALSO

       BEGIN [begin(7)], COMMIT [commit(7)], ROLLBACK [rollback(7)], SAVEPOINT [savepoint(7)], SET TRANSACTION [set_transaction(7)]

SQL - Language Statements					    2010-05-14						      START TRANSACTION(7)
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