begriffs open source - ai-pg/blob - full-docs/src/sgml/html/infoschema-constraint-table-usage.html

   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>35.19. constraint_table_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-constraint-column-usage.html" title="35.18. constraint_column_usage" /><link rel="next" href="infoschema-data-type-privileges.html" title="35.20. data_type_privileges" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">35.19. <code class="literal">constraint_table_usage</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="infoschema-constraint-column-usage.html" title="35.18. constraint_column_usage">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-data-type-privileges.html" title="35.20. data_type_privileges">Next</a></td></tr></table><hr /></div><div class="sect1" id="INFOSCHEMA-CONSTRAINT-TABLE-USAGE"><div class="titlepage"><div><div><h2 class="title" style="clear: both">35.19. <code class="literal">constraint_table_usage</code> <a href="#INFOSCHEMA-CONSTRAINT-TABLE-USAGE" class="id_link">#</a></h2></div></div></div><p>
   3    The view <code class="literal">constraint_table_usage</code> identifies all
   4    tables in the current database that are used by some constraint and
   5    are owned by a currently enabled role.  (This is different from the
   6    view <code class="literal">table_constraints</code>, which identifies all
   7    table constraints along with the table they are defined on.)  For a
   8    foreign key constraint, this view identifies the table that the
   9    foreign key references.  For a unique or primary key constraint,
  10    this view simply identifies the table the constraint belongs to.
  11    Check constraints and not-null constraints are not included in this
  12    view.
  13   </p><div class="table" id="id-1.7.6.23.3"><p class="title"><strong>Table 35.17. <code class="structname">constraint_table_usage</code> Columns</strong></p><div class="table-contents"><table class="table" summary="constraint_table_usage Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
  14        Column Type
  15       </p>
  16       <p>
  17        Description
  18       </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
  19        <code class="structfield">table_catalog</code> <code class="type">sql_identifier</code>
  20       </p>
  21       <p>
  22        Name of the database that contains the table that is used by
  23        some constraint (always the current database)
  24       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  25        <code class="structfield">table_schema</code> <code class="type">sql_identifier</code>
  26       </p>
  27       <p>
  28        Name of the schema that contains the table that is used by some
  29        constraint
  30       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  31        <code class="structfield">table_name</code> <code class="type">sql_identifier</code>
  32       </p>
  33       <p>
  34        Name of the table that is used by some constraint
  35       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  36        <code class="structfield">constraint_catalog</code> <code class="type">sql_identifier</code>
  37       </p>
  38       <p>
  39        Name of the database that contains the constraint (always the current database)
  40       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  41        <code class="structfield">constraint_schema</code> <code class="type">sql_identifier</code>
  42       </p>
  43       <p>
  44        Name of the schema that contains the constraint
  45       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  46        <code class="structfield">constraint_name</code> <code class="type">sql_identifier</code>
  47       </p>
  48       <p>
  49        Name of the constraint
  50       </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-constraint-column-usage.html" title="35.18. constraint_column_usage">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-data-type-privileges.html" title="35.20. data_type_privileges">Next</a></td></tr><tr><td width="40%" align="left" valign="top">35.18. <code class="literal">constraint_column_usage</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"> 35.20. <code class="literal">data_type_privileges</code></td></tr></table></div></body></html>