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The table <code class="literal">sql_features</code> contains information
about which formal features defined in the SQL standard are
supported by <span class="productname">PostgreSQL</span>. This is the
same information that is presented in <a class="xref" href="features.html" title="Appendix D. SQL Conformance">Appendix D</a>.
There you can also find some additional background information.
</p><div class="table" id="id-1.7.6.47.3"><p class="title"><strong>Table 37.41. <code class="literal">sql_features</code> Columns</strong></p><div class="table-contents"><table class="table" summary="sql_features Columns" border="1"><colgroup><col /><col /><col /></colgroup><thead><tr><th>Name</th><th>Data Type</th><th>Description</th></tr></thead><tbody><tr><td><code class="literal">feature_id</code></td><td><code class="type">character_data</code></td><td>Identifier string of the feature</td></tr><tr><td><code class="literal">feature_name</code></td><td><code class="type">character_data</code></td><td>Descriptive name of the feature</td></tr><tr><td><code class="literal">sub_feature_id</code></td><td><code class="type">character_data</code></td><td>Identifier string of the subfeature, or a zero-length string if not a subfeature</td></tr><tr><td><code class="literal">sub_feature_name</code></td><td><code class="type">character_data</code></td><td>Descriptive name of the subfeature, or a zero-length string if not a subfeature</td></tr><tr><td><code class="literal">is_supported</code></td><td><code class="type">yes_or_no</code></td><td>
<code class="literal">YES</code> if the feature is fully supported by the
current version of <span class="productname">PostgreSQL</span>, <code class="literal">NO</code> if not
</td></tr><tr><td><code class="literal">is_verified_by</code></td><td><code class="type">character_data</code></td><td>
Always null, since the <span class="productname">PostgreSQL</span> development group does not
perform formal testing of feature conformance
</td></tr><tr><td><code class="literal">comments</code></td><td><code class="type">character_data</code></td><td>Possibly a comment about the supported status of the feature</td></tr></tbody></table></div></div><br class="table-break" /></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="infoschema-sequences.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="information-schema.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="infoschema-sql-implementation-info.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">37.42. <code class="literal">sequences</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 37.44. <code class="literal">sql_implementation_info</code></td></tr></table></div></body></html>
