Support for testing amcaninclude via pg_indexam_has_property(oid,'can_include') seems to be missing?Also the return values of pg_index_column_has_property for included columns seem a bit dubious... should probably be returning NULL for most properties except 'returnable'.
Damn, you right, it's missed.
I can look at fixing these for you if you like?
If you will do that I will be very grateful -- Teodor Sigaev E-mail: teo...@sigaev.ru WWW: http://www.sigaev.ru/