Tom Lane wrote:
> Merlin Moncure <> writes:
> > Not sure we are guided there.  Currently we follow the spec
> > specifically with the IS NULL operator but not in other cases.
> Yeah.  ExecEvalNullTest() has been taught about this, but most other
> places that check null-ness just check overall datum null-ness without
> any concern for composite types.  This is a stopgap situation, obviously.

On this topic, see also

Álvaro Herrera      
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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