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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>37.63. view_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 Vsnapshot" /><link rel="prev" href="infoschema-user-mappings.html" title="37.62. user_mappings" /><link rel="next" href="infoschema-view-routine-usage.html" title="37.64. view_routine_usage" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">37.63. <code class="literal">view_column_usage</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="infoschema-user-mappings.html" title="37.62. user_mappings">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-view-routine-usage.html" title="37.64. view_routine_usage">Next</a></td></tr></table><hr /></div><div class="sect1" id="INFOSCHEMA-VIEW-COLUMN-USAGE"><div class="titlepage"><div><div><h2 class="title" style="clear: both">37.63. <code class="literal">view_column_usage</code> <a href="#INFOSCHEMA-VIEW-COLUMN-USAGE" class="id_link">#</a></h2></div></div></div><p>3   The view <code class="literal">view_column_usage</code> identifies all4   columns that are used in the query expression of a view (the5   <code class="command">SELECT</code> statement that defines the view).  A6   column is only included if the table that contains the column is7   owned by a currently enabled role.8  </p><div class="note"><h3 class="title">Note</h3><p>9    Columns of system tables are not included.  This should be fixed10    sometime.11   </p></div><div class="table" id="id-1.7.6.67.4"><p class="title"><strong>Table 37.61. <code class="structname">view_column_usage</code> Columns</strong></p><div class="table-contents"><table class="table" summary="view_column_usage Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">12       Column Type13      </p>14      <p>15       Description16      </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">17       <code class="structfield">view_catalog</code> <code class="type">sql_identifier</code>18      </p>19      <p>20       Name of the database that contains the view (always the current database)21      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">22       <code class="structfield">view_schema</code> <code class="type">sql_identifier</code>23      </p>24      <p>25       Name of the schema that contains the view26      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">27       <code class="structfield">view_name</code> <code class="type">sql_identifier</code>28      </p>29      <p>30       Name of the view31      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">32       <code class="structfield">table_catalog</code> <code class="type">sql_identifier</code>33      </p>34      <p>35       Name of the database that contains the table that contains the36       column that is used by the view (always the current database)37      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">38       <code class="structfield">table_schema</code> <code class="type">sql_identifier</code>39      </p>40      <p>41       Name of the schema that contains the table that contains the42       column that is used by the view43      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">44       <code class="structfield">table_name</code> <code class="type">sql_identifier</code>45      </p>46      <p>47       Name of the table that contains the column that is used by the48       view49      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">50       <code class="structfield">column_name</code> <code class="type">sql_identifier</code>51      </p>52      <p>53       Name of the column that is used by the view54      </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-user-mappings.html" title="37.62. user_mappings">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-view-routine-usage.html" title="37.64. view_routine_usage">Next</a></td></tr><tr><td width="40%" align="left" valign="top">37.62. <code class="literal">user_mappings</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"> 37.64. <code class="literal">view_routine_usage</code></td></tr></table></div></body></html>