Pass parameters to MySQL script

Question

I have a MySQL script file named query1.sql which contains:

select * FROM $(tblName) LIMIT 10;

I am in MySQL console, how do I

Answer 1

The answer from @user4150422 above almost worked from me, but cat gave me permission issues so I had to use a slight alternative. Weirdly source command didn't work in place of cat either, but \. did

mysql -u root -p -e"set @temp=1; `\. /home/mysql/Desktop/a.sql`"

Answer 2

For bash scripting:

tblName=$1 
searchFor="%something%"

echo "select * FROM $tblName LIMIT 10;
      select * From $tblName where somecolumn like '$searchFor';
" | mysql

For powershell:

$tblName="MyTable"
$searchFor="%something%"

"select * FROM $tblName LIMIT 10;
  select * From $tblName where somecolumn like '$searchFor';
" | mysql

Answer 3

You can use user variables to achieve the behaviour you describe. As you use the variable as a schema identifier, not a data value, you'll have to use a prepared statement so you can compose the query dynamically.

query1.sql:

SET @query = CONCAT('Select * FROM ', @tblName, ' LIMIT 10');
PREPARE stmt FROM @query;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

Invoked as

mysql> SET @tblName = 'Users'; \. query1.sql

Answer 4

The command line call from vidyadhar worked for me, but only with a small modification :

mysql -u root -p -e"set @temp=1; `cat /home/mysql/Desktop/a.sql`"

Answer 5

This may work for you

mysql -u root -p -e"set @temp=1;" < /home/mysql/Desktop/a.sql

and

mysql> set @temp=some_value;
mysql> source file.sql

this almost similar to your problem just try it

Answer 6

The advanced solution for use bash variables via mysql variables like @tblName in order to INSERT values into specific table:

The core file insert.preps included prepared statements procedural (SET > PREPARE > EXECUTE > DEALLOCATE):

SET @query = CONCAT("INSERT INTO ", @tblName, " (id, time, file, status) VALUES (?, ?, ?, ?)");
PREPARE stmt FROM @query;
SET @id = '0';
EXECUTE stmt USING @id, @time, @file, @status;
DEALLOCATE PREPARE stmt;

*SET @id = '0'; in the file predefined because id is usually is INT AUTO_INCREMENT PRIMARY KEY. It will auto-assign proper id for all lines.

Invoking it in the shell or in bash script with using variables:

mysql --defaults-extra-file=<(echo $'[client]\npassword='"$db_password") --user=$db_user $db_name -e "
     SET @tblName = '$table';
     SET @time = '$timeStamp';
     SET @file = '$file';
     SET @status = '$status';
`cat /path/to/insert.preps`"