Got a problem here, and this is a new area for me ... analyzing FKs and improving their performance :)
Have a table with two FKs on it ... 2 different fields in the table point to the same field in another table ...
When I do an 'EXPLAIN ANALYZE DELETE FROM table WHERE field = #;', it never comes back ... or, at lesat, takes a *very* long time ...
If I do a count(1) for that #, there are 1639 rows ...
Now, 'ON DELETE' is set to 'NO ACTION', so my *guess* is that all it does is a 'SELECT FROM table WHERE field = value' on the referenced table, to make sure it exists ...
Is this correct? So, its effectively having to do 3278 "SELECTS" against the REFERENCED table? (two fields have contraints on them, 1639 rows to be deleted) ... ?
---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664
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