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Top Forums Shell Programming and Scripting Another method for this snippet Post 302841247 by ryandegreat25 on Wednesday 7th of August 2013 06:29:36 AM
Old 08-07-2013
looks like while loop is much efficient in this case. im actually learning awk so im figuring out how to do this via awk but i guess i should stick to while loop in this case then. thanks Smilie

---------- Post updated at 06:29 PM ---------- Previous update was at 06:20 PM ----------

The tab delimiter was ignored, it opted to use space delimiter instead via while loop

Code:
[oracle@server logs]$ while read timestamp severity XA MSG1 SERVER XB XC MSG2;do
>         message="$MSG1 $MSG2"
> echo "$timestamp"
> done < /opt/application.log
2013/08/07
2013/08/07
2013/08/07
2013/08/07
2013/08/07
2013/08/07
2013/08/07
2013/08/07
2013/08/07
2013/08/07
2013/08/07
2013/08/07
2013/08/07
[oracle@server logs]$
[oracle@server logs]$ awk -F"\t" '{print $1}' /opt/application.log
2013/08/07 04:48:36:685
2013/08/07 04:48:36:685
2013/08/07 04:53:36:514
2013/08/07 04:55:16:505
2013/08/07 05:07:36:505
2013/08/07 05:07:36:505
2013/08/07 05:07:36:505
2013/08/07 05:07:36:505
2013/08/07 05:07:36:505
2013/08/07 05:07:36:505
2013/08/07 05:07:36:505
2013/08/07 05:07:38:403
2013/08/07 05:07:38:642
[oracle@server logs]$

 

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DBIx::Class::FilterColumn(3pm)				User Contributed Perl Documentation			    DBIx::Class::FilterColumn(3pm)

NAME
DBIx::Class::FilterColumn - Automatically convert column data SYNOPSIS
In your Schema or DB class add "FilterColumn" to the top of the component list. __PACKAGE__->load_components(qw( FilterColumn ... )); Set up filters for the columns you want to convert. __PACKAGE__->filter_column( money => { filter_to_storage => 'to_pennies', filter_from_storage => 'from_pennies', }); sub to_pennies { $_[1] * 100 } sub from_pennies { $_[1] / 100 } 1; DESCRIPTION
This component is meant to be a more powerful, but less DWIM-y, DBIx::Class::InflateColumn. One of the major issues with said component is that it only works with references. Generally speaking anything that can be done with DBIx::Class::InflateColumn can be done with this component. METHODS
filter_column __PACKAGE__->filter_column( colname => { filter_from_storage => 'method'|&coderef, filter_to_storage => 'method'|&coderef, }) This is the method that you need to call to set up a filtered column. It takes exactly two arguments; the first being the column name the second being a hash reference with "filter_from_storage" and "filter_to_storage" set to either a method name or a code reference. In either case the filter is invoked as: $row_obj->$filter_specification ($value_to_filter) with $filter_specification being chosen depending on whether the $value_to_filter is being retrieved from or written to permanent storage. If a specific directional filter is not specified, the original value will be passed to/from storage unfiltered. get_filtered_column $obj->get_filtered_column('colname') Returns the filtered value of the column set_filtered_column $obj->set_filtered_column(colname => 'new_value') Sets the filtered value of the column EXAMPLE OF USE
Some databases have restrictions on values that can be passed to boolean columns, and problems can be caused by passing value that perl considers to be false (such as "undef"). One solution to this is to ensure that the boolean values are set to something that the database can handle - such as numeric zero and one, using code like this:- __PACKAGE__->filter_column( my_boolean_column => { filter_to_storage => sub { $_[1] ? 1 : 0 }, } ); In this case the "filter_from_storage" is not required, as just passing the database value through to perl does the right thing. perl v5.14.2 2010-12-25 DBIx::Class::FilterColumn(3pm)
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