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Is there any way of making a mysqldump which will save all the triggers and procedures from a specified db?

Some time ago I read that mysqldump will also save my triggers, but it doesn't look like it. My second related question is how can I check in a sql file if triggers exists?

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1 Answer 1

I normally do not separate triggers from the tables they were meant for. I dump like this:

mysqldump -u... -p... --no-data --routines --triggers dbname > DBSchema.sql

Check for presence of routines and triggers like this:

SELECT COUNT(1) FROM mysql.proc;

SELECT COUNT(1) FROM information_schema.triggers;

SELECT * FROM information_schema.triggers\G

If you want to get this done to all DBs in the MySQL Instance, do this:

mysql -u... -p... -A -N -e"SELECT schema_name FROM information_schema.schemata WHERE schema_name NOT IN ('information_schema','mysql')" > /tmp/dblist.txt
for DB in `cat /tmp/dblist.txt`
do
    mysqldump -u... -p... --no-data --no-create-info --routines dbname > ${DB}-routines.sql
    mysqldump -u... -p... --no-data --triggers dbname > ${DB}-schema-triggers.sql
done

That way, stored procedures go in a routines dump for the DB, while the schema and triggers go in another dump.

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@dole Rolando's right on how to dump triggers/procedures. If you want to see if they exist in a sql file, open it and search for 'CREATE TRIGGER' calls. If in *nix, grep 'CREATE TRIGGER' –  Derek Downey Oct 2 '11 at 18:44
    
@RolandoMySQLDBA, Isn't --triggers dumped by default? What would be the difference between --no-data --routines --triggers vs --no-data --routines? –  Pacerier May 7 at 14:05
    
@Pacerier There have been situations where I didn't want triggers and I would use --skip-triggers on such occasions (such as setting up slaves that didn't need the triggers). As a constant reminder to myself of the possibility of skipping options, I always use certain flags in mysqldumps (--routines, --triggers) even if they are default. So, it's just a personal preference. If you trust that a default setting will remain a default from version to version and never deal with adhoc situations, then you express the mysqldumps as needed as long as the resulting mysqldump is correct for you. –  RolandoMySQLDBA May 7 at 14:21
    
@RolandoMySQLDBA - What do -A -N do? –  MontyPython Jul 19 at 17:05

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