bash script to access multiple mysql databases - mysql

Question

I all,
I have a series of MYSQL databases with different users and passwords, nevertheless the DB structure is the same for all databases.
I can't create a user with the same username and password to all of them and I need to quickly perform operations on all of them.
I was thinking about a bash script to run via cron.
Any suggestion? I was thinking to something like this but it is not working :(
#!/bin/bash
uconn=(
'mysql -u user_db1 --password=pass_db1 db1 '
'mysql -u user_db2 --password=pass_db2 db2 '
)
for f in "${uconn[#]}"
do
exec ${f}
echo `mysql show tables`
echo `mysql exit`
done
exit

Answer 1

Why not use the documented way?
do
${f} <<EOF
show tables
\\q
EOF
done

Answer 2

Just pasting the full code taking into consideration #Ansgar Wiechers:
#!/bin/bash
uconn=(
'mysql -u user_db1 --password=pass_db1 db1'
'mysql -u user_db2 --password=pass_db2 db2'
)
for f in "${uconn[#]}"
do
${f} <<EOF
show tables
\\q
EOF
done
exit
To execute the code from the local machine to the remote one this works for me:
ssh ssh_user#mydomain.com 'bash -s' < /local/path/to/multiple_db_connections.sh
where the content of multiple_db_connections.sh is the code above