db2 -vtf Variables

JDionne · #1 (**permalink**) 10-17-07, 03:36

Is it posable to pass a variable when using the DB2 -vtf Filename.txt syntax?

stolze · #2 (**permalink**) 10-17-07, 04:24

A variable that is used and resolved inside the SQL script? No. But you can write a simple shell script that invokes the DB2 command line. In the commands in that shell script, you can use variables. Here is an example:

Code:

#!/bin/sh

TABLE=syscat.tables

db2 "CONNECT TO <dbname>"
db2 "SELECT count(*) FROM ${TABLE}"
db2 "CONNECT RESET"

JDionne · #3 (**permalink**) 10-17-07, 05:05

The problem we are having with the shell script is that we have not found a way to format long sql so that it can be read by humans. Is there a work around for that?

stolze · #4 (**permalink**) 10-17-07, 06:58

I would do this in exactly the same way as any other SQL script, except that you have quotes wrapped around and a continuation character at the end of each line (except the last):

Code:

db2 "SELECT ..." \
    "FROM ..."

Or you use something like this:

Code:

db2 <<EOT
CONNECT TO ...

SELECT ...
FROM   ...;

CONNECT RESET;
EOT

JDionne · #5 (**permalink**) 10-17-07, 09:01

What does the db2 <<EOT mean?

n_i · #6 (**permalink**) 10-17-07, 09:37

Quote:

Originally Posted by JDionne

What does the db2 <<EOT mean?

http://en.wikipedia.org/wiki/Here_document

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