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Full Discussion: awk script queries
Top Forums UNIX for Advanced & Expert Users awk script queries Post 302543335 by devina on Sunday 31st of July 2011 03:32:53 AM
Old 07-31-2011
awk script queries

Hi,

First query:
I am trying to execute the below command to pull all the record whose length is not of the expected. But this is not giving the expected results.

$2 is the record length passed in the script as second parameter.$filename is the filename on which the awk is executed.It is returning all the records irrespective of criteria. Please advise.

awk -v xx=$2 'length!=$xx' $filename

Second query:
In an flat file, some of the records are not of the fixed length.This is due to presence of null character and junk characters.If record length is expected to be 100..due to presence of these characters it is varying to be 102-105. when executing the awk command with length function to pull the records whose length isnt matching...for those records which have null character..the record displayed on standard output is only till null character.The subsequent fields after null character is not returned by awk.Please explain why this would happen and what is the solution to retain entire record.

Also suggest a command to identify the null characters and replace by a space or any solution to fix these junk or null characters..so that we can have a complete file whose length isnt deviating from expected length..Thanks!
 

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EXECUTE(7)							   SQL Commands 							EXECUTE(7)

NAME
EXECUTE - execute a prepared query SYNOPSIS
EXECUTE plan_name [ (parameter [, ...] ) ] INPUTS plan_name The name of the prepared query to execute. parameter The actual value of a parameter to the prepared query. This must be an expression yielding a value of a type compatible with the data-type specified for this parameter position in the PREPARE statement that created the prepared query. DESCRIPTION
EXECUTE is used to execute a previously prepared query. Since prepared queries only exist for the duration of a session, the prepared query must have been created by a PREPARE statement executed earlier in the current session. If the PREPARE statement that created the query specified some parameters, a compatible set of parameters must be passed to the EXECUTE statement, or else an error is raised. Note that (unlike functions) prepared queries are not overloaded based on the type or number of their parameters: the name of a prepared query must be unique within a database session. For more information on the creation and usage of prepared queries, see PREPARE [prepare(7)]. COMPATIBILITY
SQL92 SQL92 includes an EXECUTE statement, but it is only for use in embedded SQL clients. The EXECUTE statement implemented by PostgreSQL also uses a somewhat different syntax. SQL - Language Statements 2002-11-22 EXECUTE(7)
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