I'm doing some extension development (in C) and have a situation where I need to examine the target list of a view, but all I have is the view's oid.
An approach that works is (pseudocode):
SPI_connect();
"SELECT ev_action FROM pg_catalog.pg_rewrite WHERE rulename = '_RETURN' and ev_class=?oid";
Query *query = linitial(stringToNode(ev_action));
...
SPI_finish();
I backed into this by tracing through pg_getviewdef(). Is there a more direct way to do this without going through SPI?
I also looked at using postgres.c#pg_analyze_and_rewrite() against a query like "SELECT * FROM viewname" but the target list of the actual query wasn't what I was expecting (individual entry tags don't match those of the SPI approach above).
Thanks for your time!
eric
