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   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>35.63. 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="35.62. user_mappings" /><link rel="next" href="infoschema-view-routine-usage.html" title="35.64. 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">35.63. <code class="literal">view_column_usage</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="infoschema-user-mappings.html" title="35.62. user_mappings">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="information-schema.html" title="Chapter 35. The Information Schema">Up</a></td><th width="60%" align="center">Chapter 35. The Information Schema</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="infoschema-view-routine-usage.html" title="35.64. 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">35.63. <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 all
   4    columns that are used in the query expression of a view (the
   5    <code class="command">SELECT</code> statement that defines the view).  A
   6    column is only included if the table that contains the column is
   7    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 fixed
  10     sometime.
  11    </p></div><div class="table" id="id-1.7.6.67.4"><p class="title"><strong>Table 35.61. <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 Type
  13       </p>
  14       <p>
  15        Description
  16       </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 view
  26       </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 view
  31       </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 the
  36        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 the
  42        column that is used by the view
  43       </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 the
  48        view
  49       </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 view
  54       </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="35.62. user_mappings">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="information-schema.html" title="Chapter 35. The Information Schema">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="infoschema-view-routine-usage.html" title="35.64. view_routine_usage">Next</a></td></tr><tr><td width="40%" align="left" valign="top">35.62. <code class="literal">user_mappings</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 35.64. <code class="literal">view_routine_usage</code></td></tr></table></div></body></html>