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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>36.12. column_column_usage</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 V1.79.1" /><link rel="prev" href="infoschema-collation-character-set-applicab.html" title="36.11. collation_character_set_applicability" /><link rel="next" href="infoschema-column-domain-usage.html" title="36.13. column_domain_usage" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">36.12. <code xmlns="http://www.w3.org/1999/xhtml" class="literal">column_column_usage</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="infoschema-collation-character-set-applicab.html" title="36.11. collation_character_set_applicability">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="information-schema.html" title="Chapter 36. The Information Schema">Up</a></td><th width="60%" align="center">Chapter 36. The Information Schema</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="infoschema-column-domain-usage.html" title="36.13. column_domain_usage">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="INFOSCHEMA-COLUMN-COLUMN-USAGE"><div class="titlepage"><div><div><h2 class="title" style="clear: both">36.12. <code class="literal">column_column_usage</code></h2></div></div></div><p>
The view <code class="literal">column_column_usage</code> identifies all generated
columns that depend on another base column in the same table. Only tables
owned by a currently enabled role are included.
</p><div class="table" id="id-1.7.6.16.3"><p class="title"><strong>Table 36.10. <code class="structname">column_column_usage</code> Columns</strong></p><div class="table-contents"><table class="table" summary="column_column_usage 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">table_catalog</code> <code class="type">sql_identifier</code>
</p>
<p>
Name of the database containing the table (always the current database)
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">table_schema</code> <code class="type">sql_identifier</code>
</p>
<p>
Name of the schema containing the table
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">table_name</code> <code class="type">sql_identifier</code>
</p>
<p>
Name of the table
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">column_name</code> <code class="type">sql_identifier</code>
</p>
<p>
Name of the base column that a generated column depends on
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">dependent_column</code> <code class="type">sql_identifier</code>
</p>
<p>
Name of the generated column
</p></td></tr></tbody></table></div></div><br class="table-break" /></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="infoschema-collation-character-set-applicab.html" title="36.11. collation_character_set_applicability">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="information-schema.html" title="Chapter 36. The Information Schema">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="infoschema-column-domain-usage.html" title="36.13. column_domain_usage">Next</a></td></tr><tr><td width="40%" align="left" valign="top">36.11. <code xmlns="http://www.w3.org/1999/xhtml" class="literal">collation_character_set_applicability</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 36.13. <code xmlns="http://www.w3.org/1999/xhtml" class="literal">column_domain_usage</code></td></tr></table></div></body></html>
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