> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/client-interfaces/the-information-schema/36.43.-sql_features.md).

# 37.48. sql\_features

The table `sql_features` contains information about which formal features defined in the SQL standard are supported by PostgreSQL. This is the same information that is presented in [Appendix D](https://www.postgresql.org/docs/current/features.html). There you can also find some additional background information.

#### **Table 37.46. `sql_features` Columns**

| <p>Column Type</p><p>Description</p>                                                                                                                                               |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <p><code>feature\_id</code> <code>character\_data</code></p><p>Identifier string of the feature</p>                                                                                |
| <p><code>feature\_name</code> <code>character\_data</code></p><p>Descriptive name of the feature</p>                                                                               |
| <p><code>sub\_feature\_id</code> <code>character\_data</code></p><p>Identifier string of the subfeature, or a zero-length string if not a subfeature</p>                           |
| <p><code>sub\_feature\_name</code> <code>character\_data</code></p><p>Descriptive name of the subfeature, or a zero-length string if not a subfeature</p>                          |
| <p><code>is\_supported</code> <code>yes\_or\_no</code></p><p><code>YES</code> if the feature is fully supported by the current version of PostgreSQL, <code>NO</code> if not</p>   |
| <p><code>is\_verified\_by</code> <code>character\_data</code></p><p>Always null, since the PostgreSQL development group does not perform formal testing of feature conformance</p> |
| <p><code>comments</code> <code>character\_data</code></p><p>Possibly a comment about the supported status of the feature</p>                                                       |


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