On Tuesday, May 10, 2016, Euler Taveira <eu...@timbira.com.br> wrote: > > Also, IS DISTINCT FROM is an alias for = operator per standard IIRC. >
Technically "is not distinct from" would be more correct. Alias implies exact while in the presence of nulls the two behave differently. "is distinct from" ~ "<>" which is the canonical form (alias) for "!=" http://www.postgresql.org/docs/9.5/interactive/functions-comparison.html David J.