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Full Discussion: comparing multiple variables by 'if then'
Top Forums Shell Programming and Scripting comparing multiple variables by 'if then' Post 302350600 by smallville on Friday 4th of September 2009 10:09:55 AM
Old 09-04-2009
comparing multiple variables by 'if then'
Hi,
I am a noob at shell scripting.
basically I am trying to compare row counts from 8 tables in different databases. I have managed to get the row counts using awk from the spool files for both databases.

now I have 16 variables with me

for database 1 :

$A
$B
$C
$D
$E
$F
$G
$H

for database 2:

$A1
$B1
$C1
$D1
$E1
$F1
$G1
$H1


now i want to compare the row counts if they r equal....if so, the script shud continue and execute my next script say 'next.sh' lying in the same directory
else it shud give an error and mail to the user.

what i am trying to do is

if $A = $A1 and
$B = $B1

...
... and
$H=$H1

then



all 8 variables must be equal to each other before continuing else the script shud error out.

PLease help
 

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LEARN ABOUT REDHAT

clusterdb

CLUSTERDB(1)						  PostgreSQL Client Applications					      CLUSTERDB(1)

NAME

       clusterdb - cluster a PostgreSQL database

SYNOPSIS

       clusterdb [ connection-options... ] [ --table | -t table  ] [ dbname ]

       clusterdb [ connection-options... ] [ --all | -a ]

DESCRIPTION

       clusterdb  is a utility for reclustering tables in a PostgreSQL database. It finds tables that have previously been clustered, and clusters
       them again on the same index that was last used. Tables that have never been clustered are not touched.

       clusterdb is a shell script wrapper around the backend command CLUSTER [cluster(7)] via the PostgreSQL interactive terminal psql(1).  There
       is  no effective difference between clustering databases via this or other methods.  psql must be found by the script and a database server
       must be running at the targeted host. Also, any default settings and environment variables  available  to  psql	and  the  libpq  front-end
       library do apply.

       clusterdb  might  need  to  connect  several  times  to	the PostgreSQL server, asking for a password each time. It is convenient to have a
       $HOME/.pgpass file in such cases.

OPTIONS

       clusterdb accepts the following command-line arguments:

       -a

       --all  Cluster all databases.

       [-d] dbname

       [--dbname] dbname
	      Specifies the name of the database to be clustered.  If this is not specified and -a (or --all) is not used, the	database  name	is
	      read from the environment variable PGDATABASE. If that is not set, the user name specified for the connection is used.

       -e

       --echo Echo the commands that clusterdb generates and sends to the server.

       -q

       --quiet
	      Do not display a response.

       -t table

       --table table
	      Clusters table only.

       clusterdb also accepts the following command-line arguments for connection parameters:

       -h host

       --host host
	      Specifies  the host name of the machine on which the server is running. If host begins with a slash, it is used as the directory for
	      the Unix domain socket.

       -p port

       --port port
	      Specifies the Internet TCP/IP port or local Unix domain socket file extension on which the server is listening for connections.

       -U username

       --username username
	      User name to connect as

       -W

       --password
	      Force password prompt.

DIAGNOSTICS

       CLUSTER
	      Everything went well.

       clusterdb: Cluster failed.
	      Something went wrong. clusterdb is only a wrapper script. See CLUSTER [cluster(7)] and psql(1) for a detailed  discussion  of  error
	      messages and potential problems. Note that this message may appear once per table to be clustered.

ENVIRONMENT

       PGDATABASE

       PGHOST

       PGPORT

       PGUSER Default connection parameters.

EXAMPLES

       To cluster the database test:

       $ clusterdb test

       To cluster a single table foo in a database named xyzzy:

       $ clusterdb --table foo xyzzy

SEE ALSO

       CLUSTER [cluster(7)]

Application							    2002-11-22							      CLUSTERDB(1)
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