36.44. sql_features
The tablesql_features contains information about which formal features defined in the SQL standard are supported byPostgreSQL. This is the same information that is presented inAppendix D. There you can also find some additional background information.
Table 36.42. sql_features Columns
| Name | Data Type | Description |
|---|---|---|
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 ofPostgreSQL,NO if not |
is_verified_by | character_data | Always null, since thePostgreSQL development group does not perform formal testing of feature conformance |
comments | character_data | Possibly a comment about the supported status of the feature |