shell save MySQL query result to a file - linux

Question

I have a script which runs a MySQL query, something like this:
#!/bin/sh
user="root"
pwd="test"
database="mydb"
command="long...
long... query in
multiple lines"
mysql -u $user -p$pwd << EOF
use $database;
$command
EOF
This query does a backup from a table to another. Is it possible to save the query result in a file without using mysql INTO OUTFILE? I only want to know if the query failed or succeeded.
If it succeeded something like 1 row(s) affected or if it failed Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ...
Update
Solution 1: () act as a chain of commands, so wrapping them in a variable gets the result of those commands. Then simply output the result of that variable in a file.
output=$( mysql -u $user -p$pwd << EOF
use $database;
$command
EOF
)
echo "$output" >> /events/mysql.log
Solution 2: use tee as system command to send the result of the commands into a file, but this needs to be done from the crontab, like this:
*/1 * * * * root sh /events/mysql.sh |tee -a /events/mysql.log
http://forums.mysql.com/read.php?10,391070,391983#msg-391983
My working solution:
user="root"
pwd="root12345"
database="mydb"
command="long ...long query"
mysql -u $user -p$pwd << EOF >> /events/mysql.log 2>&1
use $database;
$command;
EOF

Answer 1

This should work:
output=$( mysql -u $user -p$pwd << EOF
use $database;
$command
EOF
)
echo "$output" >> outfile

Answer 2

The correct way to handle error-messages is to through stderr. Use 2>&1 to catch the error.
So, add this to the end of your script:
>> install.log 2>&1

Answer 3

you can also do it like this:
#!/bin/sh
user="root"
pwd="test"
database="mydb"
command="long...
long... query in
multiple lines"
mysql -u$user -p$pwd -D$database -e "$command" > file

Answer 4

It's easier to use the MySQL tee command to send output.
To get the logging process started, just use the tee command,
tee /tmp/my.out;
#!/bin/sh
user="root"
pwd="test"
database="mydb"
$pathToFile = "/tmp/my.out"
command="long...
long... query in
multiple lines"
mysql -u $user -p$pwd << EOF
tee $pathToFile
use $database;
$command
EOF
EDIT
Since tee is reportedly not working inside script, you could also log output using Tee directly when running the script.
mysql_bash.sh > >(tee -a script.log)