On Tue, 16 Dec 2003, Jenny Zhang wrote:
> I have stored procedure written in pl/pgsql which takes about 13 seconds
> to finish. I was able to identify that the slowness is caused by one
> update SQL:
>
> UPDATE shopping_cart SET sc_sub_total=sc_subtotal, sc_date=now()
> WHERE sc_id=sc_id;
Umm, is that exactly the condition you're using? Isn't that going to
update the entire table?
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
