feature_id character_data

Identifier string of the feature

feature_name character_data

Descriptive name of the feature

sub_feature_id character_data

Identifier string of the subfeature, or a zero-length string if not a subfeature

sub_feature_name character_data

Descriptive name of the subfeature, or a zero-length string if not a subfeature

is_supported yes_or_no

YES if the feature is fully supported by the current version of PostgreSQL, NO if not

is_verified_by character_data

Always null, since the PostgreSQL development group does not perform formal testing of feature conformance

comments character_data

Possibly a comment about the supported status of the feature