Question: What do
I do to locate a table that exists in one of many databases?
I know how to find a table in one database using dba_tables,
but I need to check all of the databases for the table name.
How do I quickly check all databases for a table?
Answer: To connect to all
databases on all Oracle servers, the following script will
connect to each database and check for the table name:
This will
visit every database in your
enterprise. In the following example, we perform a double
loop, looping from server to server. For each server, we
loop from database to database. Here is the actual UNIX code
that perform the loops.
# Loop through each host name
. . .
for host in `cat ~oracle/.rhosts|cut -d"." -f1|awk
'{print $1}'|sort -u`
do
echo " "
echo "************************"
echo "$host"
echo "************************"
# Loop through
each database name on the host /etc/oratab . . .
for db in `rsh $host "cat /etc/oratab|egrep ':N|:Y'|grep -v
\*|\
cut -f1 -':'"`
do
# Get the ORACLE_HOME for each database
home=`rsh $host "cat /etc/oratab|egrep ':N|:Y'|grep -v \*|\
grep {db}|cut -f2 -d':'"`
echo " "
echo "database is $db"
sqlplus system/manager@$db <<!
select owner from dba_tables where table_name = 'FRED';
exit;
!
done
done
This will search on all Oracle servers, and all instances
on each server for a table.
WARNING! This trick is only for
secure shops without any outside access (internet
connectivity). There is a security exposure with rsh
because a hack into one server will expose all servers that
they can rsh onto. Hence, this tip is only for secured
server farms where rsh can be safely implemented.
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