Querying Headers

[pw <p(dot)willis(at)telus(dot)net>]

Hello,

I am curious if there is a postgresql function that will
return a list of header names based on an input query text.

ie:


select return_headers("SELECT name, date, shape FROM some_table;") as 
headers;

returning:

headers
-------
name
date
shape


Thanks for any help.

Pw