Re: COPY formatting

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?
        regards, tom lane