pub trait PostgresNullSupport { }Expand description
Marker trait for dialects that support GREATEST/LEAST (PostgreSQL).
SQLite does not have GREATEST/LEAST. While its multi-argument
MAX/MIN are superficially similar, they have different NULL semantics:
PostgreSQL ignores NULLs (GREATEST(1, NULL) = 1) while SQLite
propagates them (MAX(1, NULL) = NULL).