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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>54.1. Overview</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="views.html" title="Chapter 54. System Views" /><link rel="next" href="view-pg-available-extensions.html" title="54.2. pg_available_extensions" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">54.1. Overview</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="views.html" title="Chapter 54. System Views">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="views.html" title="Chapter 54. System Views">Up</a></td><th width="60%" align="center">Chapter 54. System Views</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="view-pg-available-extensions.html" title="54.2. pg_available_extensions">Next</a></td></tr></table><hr /></div><div class="sect1" id="VIEWS-OVERVIEW"><div class="titlepage"><div><div><h2 class="title" style="clear: both">54.1. Overview</h2></div></div></div><p>
+   <a class="xref" href="views-overview.html#VIEW-TABLE" title="Table 54.1. System Views">Table 54.1</a> lists the system views.
+   More detailed documentation of each catalog follows below.
+   Except where noted, all the views described here are read-only.
+  </p><div class="table" id="VIEW-TABLE"><p class="title"><strong>Table 54.1. System Views</strong></p><div class="table-contents"><table class="table" summary="System Views" border="1"><colgroup><col /><col /></colgroup><thead><tr><th>View Name</th><th>Purpose</th></tr></thead><tbody><tr><td><a class="link" href="view-pg-available-extensions.html" title="54.2. pg_available_extensions"><code class="structname">pg_available_extensions</code></a></td><td>available extensions</td></tr><tr><td><a class="link" href="view-pg-available-extension-versions.html" title="54.3. pg_available_extension_versions"><code class="structname">pg_available_extension_versions</code></a></td><td>available versions of extensions</td></tr><tr><td><a class="link" href="view-pg-backend-memory-contexts.html" title="54.4. pg_backend_memory_contexts"><code class="structname">pg_backend_memory_contexts</code></a></td><td>backend memory contexts</td></tr><tr><td><a class="link" href="view-pg-config.html" title="54.5. pg_config"><code class="structname">pg_config</code></a></td><td>compile-time configuration parameters</td></tr><tr><td><a class="link" href="view-pg-cursors.html" title="54.6. pg_cursors"><code class="structname">pg_cursors</code></a></td><td>open cursors</td></tr><tr><td><a class="link" href="view-pg-file-settings.html" title="54.7. pg_file_settings"><code class="structname">pg_file_settings</code></a></td><td>summary of configuration file contents</td></tr><tr><td><a class="link" href="view-pg-group.html" title="54.8. pg_group"><code class="structname">pg_group</code></a></td><td>groups of database users</td></tr><tr><td><a class="link" href="view-pg-hba-file-rules.html" title="54.9. pg_hba_file_rules"><code class="structname">pg_hba_file_rules</code></a></td><td>summary of client authentication configuration file contents</td></tr><tr><td><a class="link" href="view-pg-ident-file-mappings.html" title="54.10. pg_ident_file_mappings"><code class="structname">pg_ident_file_mappings</code></a></td><td>summary of client user name mapping configuration file contents</td></tr><tr><td><a class="link" href="view-pg-indexes.html" title="54.11. pg_indexes"><code class="structname">pg_indexes</code></a></td><td>indexes</td></tr><tr><td><a class="link" href="view-pg-locks.html" title="54.12. pg_locks"><code class="structname">pg_locks</code></a></td><td>locks currently held or awaited</td></tr><tr><td><a class="link" href="view-pg-matviews.html" title="54.13. pg_matviews"><code class="structname">pg_matviews</code></a></td><td>materialized views</td></tr><tr><td><a class="link" href="view-pg-policies.html" title="54.14. pg_policies"><code class="structname">pg_policies</code></a></td><td>policies</td></tr><tr><td><a class="link" href="view-pg-prepared-statements.html" title="54.15. pg_prepared_statements"><code class="structname">pg_prepared_statements</code></a></td><td>prepared statements</td></tr><tr><td><a class="link" href="view-pg-prepared-xacts.html" title="54.16. pg_prepared_xacts"><code class="structname">pg_prepared_xacts</code></a></td><td>prepared transactions</td></tr><tr><td><a class="link" href="view-pg-publication-tables.html" title="54.17. pg_publication_tables"><code class="structname">pg_publication_tables</code></a></td><td>publications and information of their associated tables</td></tr><tr><td><a class="link" href="view-pg-replication-origin-status.html" title="54.18. pg_replication_origin_status"><code class="structname">pg_replication_origin_status</code></a></td><td>information about replication origins, including replication progress</td></tr><tr><td><a class="link" href="view-pg-replication-slots.html" title="54.19. pg_replication_slots"><code class="structname">pg_replication_slots</code></a></td><td>replication slot information</td></tr><tr><td><a class="link" href="view-pg-roles.html" title="54.20. pg_roles"><code class="structname">pg_roles</code></a></td><td>database roles</td></tr><tr><td><a class="link" href="view-pg-rules.html" title="54.21. pg_rules"><code class="structname">pg_rules</code></a></td><td>rules</td></tr><tr><td><a class="link" href="view-pg-seclabels.html" title="54.22. pg_seclabels"><code class="structname">pg_seclabels</code></a></td><td>security labels</td></tr><tr><td><a class="link" href="view-pg-sequences.html" title="54.23. pg_sequences"><code class="structname">pg_sequences</code></a></td><td>sequences</td></tr><tr><td><a class="link" href="view-pg-settings.html" title="54.24. pg_settings"><code class="structname">pg_settings</code></a></td><td>parameter settings</td></tr><tr><td><a class="link" href="view-pg-shadow.html" title="54.25. pg_shadow"><code class="structname">pg_shadow</code></a></td><td>database users</td></tr><tr><td><a class="link" href="view-pg-shmem-allocations.html" title="54.26. pg_shmem_allocations"><code class="structname">pg_shmem_allocations</code></a></td><td>shared memory allocations</td></tr><tr><td><a class="link" href="view-pg-stats.html" title="54.27. pg_stats"><code class="structname">pg_stats</code></a></td><td>planner statistics</td></tr><tr><td><a class="link" href="view-pg-stats-ext.html" title="54.28. pg_stats_ext"><code class="structname">pg_stats_ext</code></a></td><td>extended planner statistics</td></tr><tr><td><a class="link" href="view-pg-stats-ext-exprs.html" title="54.29. pg_stats_ext_exprs"><code class="structname">pg_stats_ext_exprs</code></a></td><td>extended planner statistics for expressions</td></tr><tr><td><a class="link" href="view-pg-tables.html" title="54.30. pg_tables"><code class="structname">pg_tables</code></a></td><td>tables</td></tr><tr><td><a class="link" href="view-pg-timezone-abbrevs.html" title="54.31. pg_timezone_abbrevs"><code class="structname">pg_timezone_abbrevs</code></a></td><td>time zone abbreviations</td></tr><tr><td><a class="link" href="view-pg-timezone-names.html" title="54.32. pg_timezone_names"><code class="structname">pg_timezone_names</code></a></td><td>time zone names</td></tr><tr><td><a class="link" href="view-pg-user.html" title="54.33. pg_user"><code class="structname">pg_user</code></a></td><td>database users</td></tr><tr><td><a class="link" href="view-pg-user-mappings.html" title="54.34. pg_user_mappings"><code class="structname">pg_user_mappings</code></a></td><td>user mappings</td></tr><tr><td><a class="link" href="view-pg-views.html" title="54.35. pg_views"><code class="structname">pg_views</code></a></td><td>views</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="views.html" title="Chapter 54. System Views">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="views.html" title="Chapter 54. System Views">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="view-pg-available-extensions.html" title="54.2. pg_available_extensions">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 54. System Views </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 54.2. <code class="structname">pg_available_extensions</code></td></tr></table></div></body></html>
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