Re: COPY formatting

Tom Lane wrote:
> Karel Zak <zakkr@zf.jcu.cz> writes:
> 
>> The formatting function API can be pretty simple:
>> text *my_copy_format(text *attrdata, int direction, 
>>             int nattrs, int attr, oid attrtype, oid relation)
> 
> 
> This seems like it could only reasonably be implemented as a C function.
> I can't really imagine the average user of COPY wanting to write C in
> preference to, say, an external perl script.  What's the real use-case
> for the feature?
> 

That is why I suggested providing a pre-written/pre-compiled/installed 
function for CSV (call it CSV?).  Advanced users could still write their 
own as people can write many other things if they know their ways.