Re: Keep notnullattrs in RelOptInfo (Was part of UniqueKey patch series)

For example: SELECT nullablecol FROM tab WHERE nullablecol = <value>;

If the equality operator is strict then the nullablecol can be NULL in
the WHERE clause but not in the SELECT list. Tom's idea should allow
us to determine both of those things but your idea cannot tell them
apart, so, in theory at least, Tom's idea seems better to me.

David