I have a quick question:

I have a table called mytable that has the following structure:

Code MySQL:
id INT NOT NULL AUTO_INCRMENET PRIMARY KEY
vert_id INT NOT NULL
local_id INT NOT NULL

With the following rows:

Code MySQL:
id---vert_id----local_id
1       10             6
2       52             6
3      67              8


I want to run an insert like this:
Code MySQL:
INSERT INTO mytable (vert_id, local_id) VALUES ('10', '6'), ('10', '7')

I need mysql only to insert the ('10', '7') and not ('10', '6') because that pair already exists.

I tried using insert ingore, but since these aren't unique or primary indexes it doesn't work.

Any help would be greatly appreciated
thanks!