Andrew Dunstan <andrew@dunslane.net> writes:
> Tom Lane wrote:
>> Andrew Dunstan <andrew@dunslane.net> writes:
>>> What is the approved way to iterate over a relation's attributes?
>>
>> Most places scan through the relation's tuple descriptor, rather
>> than expending multiple catalog lookups in pg_attribute.
> Doesn't that require me to open the relation? Is that a good thing if I
> wouldn't otherwise be doing that?
Sure, because whatever work gets done is likely to be amortized across
multiple uses of the relcache entry anyway.
regards, tom lane