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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>37.48. sql_features</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="infoschema-sequences.html" title="37.47. sequences" /><link rel="next" href="infoschema-sql-implementation-info.html" title="37.49. sql_implementation_info" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">37.48. <code class="literal">sql_features</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="infoschema-sequences.html" title="37.47. sequences">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="information-schema.html" title="Chapter 37. The Information Schema">Up</a></td><th width="60%" align="center">Chapter 37. The Information Schema</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.7 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="infoschema-sql-implementation-info.html" title="37.49. sql_implementation_info">Next</a></td></tr></table><hr /></div><div class="sect1" id="INFOSCHEMA-SQL-FEATURES"><div class="titlepage"><div><div><h2 class="title" style="clear: both">37.48. <code class="literal">sql_features</code></h2></div></div></div><p>
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-1.7.6.52.3"><p class="title"><strong>Table 37.46. <code class="structname">sql_features</code> Columns</strong></p><div class="table-contents"><table class="table" summary="sql_features Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
Column Type
</p>
<p>
Description
</p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">feature_id</code> <code class="type">character_data</code>
</p>
<p>
Identifier string of the feature
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">feature_name</code> <code class="type">character_data</code>
</p>
<p>
Descriptive name of the feature
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">sub_feature_id</code> <code class="type">character_data</code>
</p>
<p>
Identifier string of the subfeature, or a zero-length string if not a subfeature
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">sub_feature_name</code> <code class="type">character_data</code>
</p>
<p>
Descriptive name of the subfeature, or a zero-length string if not a subfeature
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">is_supported</code> <code class="type">yes_or_no</code>
</p>
<p>
<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
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">is_verified_by</code> <code class="type">character_data</code>
</p>
<p>
Always null, since the <span class="productname">PostgreSQL</span> development group does not
perform formal testing of feature conformance
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">comments</code> <code class="type">character_data</code>
</p>
<p>
Possibly a comment about the supported status of the feature
</p></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" title="37.47. sequences">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="information-schema.html" title="Chapter 37. The Information Schema">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="infoschema-sql-implementation-info.html" title="37.49. sql_implementation_info">Next</a></td></tr><tr><td width="40%" align="left" valign="top">37.47. <code class="literal">sequences</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.7 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 37.49. <code class="literal">sql_implementation_info</code></td></tr></table></div></body></html>
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