Re: Index Skip Scan

Surely it isn't right to add members prefixed with "ioss_" to
struct IndexScanState.

I'm surprised about this "FirstTupleEmitted" business.  Wouldn't it make
more sense to implement index_skip() to return the first tuple if the
scan is just starting?  (I know little about executor, apologies if this
is a stupid question.)

It would be good to get more knowledgeable people to review this patch.
It's clearly something we want, yet it's been there for a very long
time.

Thanks

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services