Question

I have to convert a shell script from Oracle to db2. I found on this forum a sample of Oracle script I used ; it looks like this

#!/bin/bash
OUT=`$ORACLE_HOME/bin/sqlplus -s user/pass@instance   << EOF
select sysdate from dual;
exit success
EOF`
echo $OUT

This will output “03-OCT-11” (Oracle sysdate). My db2 script looks like this

#!/bin/bash
db2bin="/users/db2inst1/sqllib/bin"
#connect
$db2bin/db2 connect to myschema;
#query
$db2bin/db2 "SELECT CURRENT_DATE FROM SYSIBM.SYSDUMMY1 WITH UR";
#debug
echo $?
#check
if [ $? = "0" ] then         echo "found-do something"
else        echo "not found-good bye"
fi
#terminate
$db2bin/db2 quit;

It works but does not retrieve the date ; only “0” or “1” (true/false). How can I retrieve the date from my Db2 query result??

Answer 1

Chris, your environment variables and your DB2 command path should be set by sourcing db2profile. The quit command is unnecessary when calling the db2 command with either a SQL file or a single statement specified as part of the command-line.

#!/bin/bash
. ~db2inst1/sqllib/db2profile
OUT=`db2 connect to myschema >/dev/null 2>&1; db2 -x values current date`

Your database connection will remain available until the script ends, so you can run successive statements without reconnecting.

#!/bin/bash
. ~db2inst1/sqllib/db2profile
db2 connect to myschema >/dev/null 
OUT=`db2 -x values current date`
AAA=`db2 -x " select a from sometable where b = 'c' " `