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Top Forums Shell Programming and Scripting Select record with MAX value in MySQL Post 302433679 by chebarbudo on Wednesday 30th of June 2010 08:30:49 AM
Old 06-30-2010
Currently, I run 2 queries per record and 24 general queries.

Are you telling me I should process lines one by one for every operation which means running 26 queries per record?

With an average of 50 files received per minutes, do you confirm I'd better run
6,500 queries every 5 minutes
rather than
524 queries every 5 minutes?
 

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CGI::Session::Driver::mysql(3pm)			User Contributed Perl Documentation			  CGI::Session::Driver::mysql(3pm)

NAME
CGI::Session::Driver::mysql - CGI::Session driver for MySQL database SYNOPSIS
$s = CGI::Session->new( 'driver:mysql', $sid); $s = CGI::Session->new( 'driver:mysql', $sid, { DataSource => 'dbi:mysql:test', User => 'sherzodr', Password => 'hello' }); $s = CGI::Session->new( 'driver:mysql', $sid, { Handle => $dbh } ); DESCRIPTION
mysql stores session records in a MySQL table. For details see CGI::Session::Driver::DBI, its parent class. It's especially important for the MySQL driver that the session ID column be defined as a primary key, or at least "unique", like this: CREATE TABLE sessions ( id CHAR(32) NOT NULL PRIMARY KEY, a_session TEXT NOT NULL ); To use different column names, change the 'create table' statement, and then simply do this: $s = CGI::Session->new('driver:mysql', undef, { TableName=>'session', IdColName=>'my_id', DataColName=>'my_data', DataSource=>'dbi:mysql:project', }); or $s = CGI::Session->new('driver:mysql', undef, { TableName=>'session', IdColName=>'my_id', DataColName=>'my_data', Handle=>$dbh, }); DRIVER ARGUMENTS mysql driver supports all the arguments documented in CGI::Session::Driver::DBI. In addition, DataSource argument can optionally leave leading "dbi:mysql:" string out: $s = CGI::Session->new( 'driver:mysql', $sid, {DataSource=>'shopping_cart'}); # is the same as: $s = CGI::Session->new( 'driver:mysql', $sid, {DataSource=>'dbi:mysql:shopping_cart'}); BACKWARDS COMPATIBILITY As of V 4.30, the global variable $CGI::Session::MySQL::TABLE_NAME cannot be used to set the session table's name. This is due to changes in CGI::Session::Driver's new() method, which now allows the table's name to be changed (as well as allowing both the 'id' column name and the 'a_session' column name to be changed). See the documentation for CGI::Session::Driver::DBI for details. In particular, the new syntax for "new()" applies to all database drivers, whereas the old - and bad - global variable method only applied to MySQL. Alternately, call $session -> table_name('new_name') just after creating the session object if you wish to change the session table's name. LICENSING
For support and licensing see CGI::Session. perl v5.12.4 2011-07-08 CGI::Session::Driver::mysql(3pm)
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