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Special Forums UNIX and Linux Applications passing regular expressions to mysql via $1 Post 302234821 by otheus on Wednesday 10th of September 2008 11:50:23 AM
Old 09-10-2008
Quote:
Originally Posted by ankimo
Code:
mysql -BCNnqs --disable-pager -u system -pmanager << EOJ
use mysql;
 
set @regex = '$1';
select user from user where user REGEXP @regex;
 
quit
EOJ

I don't have access to this at the moment to test it, but you can put the entire select statement inside a variable:
Code:
QUERY="select user from user"
if [ -n "$1" ]; then
  QUERY="$QUERY where user REGEXP '$1'"
fi

mysql -BCNnqs --disable-pager -u system -pmanager << EOJ
use mysql;
$QUERY ;
quit
EOJ

And actually, you can specify the database on the command line, so that you pipe the command into mysql:
Code:
echo $QUERY | 
mysql -BCNnqs --disable-pager -d mysql -u system -pmanager

(I think it's the -d option. It might be -D).
 

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PMDAMYSQL(1)						       Performance Co-Pilot						      PMDAMYSQL(1)

NAME
pmdamysql - MySQL database PMDA DESCRIPTION
pmdamysql is a Performance Co-Pilot PMDA which extracts live performance data from a running MySQL database. INSTALLATION
pmdamysql uses a configuration file from (in this order): o /etc/pcpdbi.conf o $PCP_PMDAS_DIR/mysql/mysql.conf This file can contain overridden values (Perl code) for the settings listed at the start of pmdamysql.pl, namely: o database name (see DBI(3) for details) o database user name o database pass word Once this is setup, you can access the names and values for the mysql performance metrics by doing the following as root: # cd $PCP_PMDAS_DIR/mysql # ./Install If you want to undo the installation, do the following as root: # cd $PCP_PMDAS_DIR/mysql # ./Remove pmdamysql is launched by pmcd(1) and should never be executed directly. The Install and Remove scripts notify pmcd(1) when the agent is installed or removed. Binary Status values in text Some of the status values are in the form of YES/NO or ON/OFF. Since these cannot be intepreted by tools like PMIE, they have been duplicated with a _num extension and the values of 1 (YES/ON) or 0 (NO/OFF). Eg: o mysql.slave_status.slave_io_running o mysql.slave_status.slave_io_running_num FILES
/etc/pcpdbi.conf configuration file for all PCP database monitors $PCP_PMDAS_DIR/mysql/mysql.conf configuration file for pmdamysql $PCP_PMDAS_DIR/mysql/Install installation script for the pmdamysql agent $PCP_PMDAS_DIR/mysql/Remove undo installation script for the pmdamysql agent $PCP_LOG_DIR/pmcd/mysql.log default log file for error messages from pmdamysql SEE ALSO
pmcd(1), pmdadbping.pl(1) and DBI(3). # vi: sw=4 ts=4 et: 3.8.10 Performance Co-Pilot PMDAMYSQL(1)
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