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1<?xml version="1.0" encoding="UTF-8" standalone="no"?>2<!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 16.3 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> <a href="#INFOSCHEMA-SQL-FEATURES" class="id_link">#</a></h2></div></div></div><p>3   The table <code class="literal">sql_features</code> contains information4   about which formal features defined in the SQL standard are5   supported by <span class="productname">PostgreSQL</span>.  This is the6   same information that is presented in <a class="xref" href="features.html" title="Appendix D. SQL Conformance">Appendix D</a>.7   There you can also find some additional background information.8  </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">9       Column Type10      </p>11      <p>12       Description13      </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">14       <code class="structfield">feature_id</code> <code class="type">character_data</code>15      </p>16      <p>17       Identifier string of the feature18      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">19       <code class="structfield">feature_name</code> <code class="type">character_data</code>20      </p>21      <p>22       Descriptive name of the feature23      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">24       <code class="structfield">sub_feature_id</code> <code class="type">character_data</code>25      </p>26      <p>27       Identifier string of the subfeature, or a zero-length string if not a subfeature28      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">29       <code class="structfield">sub_feature_name</code> <code class="type">character_data</code>30      </p>31      <p>32       Descriptive name of the subfeature, or a zero-length string if not a subfeature33      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">34       <code class="structfield">is_supported</code> <code class="type">yes_or_no</code>35      </p>36      <p>37       <code class="literal">YES</code> if the feature is fully supported by the38       current version of <span class="productname">PostgreSQL</span>, <code class="literal">NO</code> if not39      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">40       <code class="structfield">is_verified_by</code> <code class="type">character_data</code>41      </p>42      <p>43       Always null, since the <span class="productname">PostgreSQL</span> development group does not44       perform formal testing of feature conformance45      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">46       <code class="structfield">comments</code> <code class="type">character_data</code>47      </p>48      <p>49       Possibly a comment about the supported status of the feature50      </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 16.3 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>