<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >pg_extension</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.6.4 Documentation" HREF="index.html"><LINK REL="UP" TITLE="System Catalogs" HREF="catalogs.html"><LINK REL="PREVIOUS" TITLE="pg_event_trigger" HREF="catalog-pg-event-trigger.html"><LINK REL="NEXT" TITLE="pg_foreign_data_wrapper" HREF="catalog-pg-foreign-data-wrapper.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-08-11T02:27:18"></HEAD ><BODY CLASS="SECT1" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="4" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.6.4 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="pg_event_trigger" HREF="catalog-pg-event-trigger.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="catalogs.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" >Chapter 50. System Catalogs</TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="pg_foreign_data_wrapper" HREF="catalog-pg-foreign-data-wrapper.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="CATALOG-PG-EXTENSION" >50.22. <TT CLASS="STRUCTNAME" >pg_extension</TT ></A ></H1 ><P > The catalog <TT CLASS="STRUCTNAME" >pg_extension</TT > stores information about the installed extensions. See <A HREF="extend-extensions.html" >Section 36.15</A > for details about extensions. </P ><DIV CLASS="TABLE" ><A NAME="AEN106952" ></A ><P ><B >Table 50-22. <TT CLASS="STRUCTNAME" >pg_extension</TT > Columns</B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><COL><COL><THEAD ><TR ><TH >Name</TH ><TH >Type</TH ><TH >References</TH ><TH >Description</TH ></TR ></THEAD ><TBODY ><TR ><TD ><TT CLASS="STRUCTFIELD" >oid</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD > </TD ><TD >Row identifier (hidden attribute; must be explicitly selected)</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >extname</TT ></TD ><TD ><TT CLASS="TYPE" >name</TT ></TD ><TD > </TD ><TD >Name of the extension</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >extowner</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-authid.html" ><TT CLASS="STRUCTNAME" >pg_authid</TT ></A >.oid</TT ></TD ><TD >Owner of the extension</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >extnamespace</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-namespace.html" ><TT CLASS="STRUCTNAME" >pg_namespace</TT ></A >.oid</TT ></TD ><TD >Schema containing the extension's exported objects</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >extrelocatable</TT ></TD ><TD ><TT CLASS="TYPE" >bool</TT ></TD ><TD > </TD ><TD >True if extension can be relocated to another schema</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >extversion</TT ></TD ><TD ><TT CLASS="TYPE" >text</TT ></TD ><TD > </TD ><TD >Version name for the extension</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >extconfig</TT ></TD ><TD ><TT CLASS="TYPE" >oid[]</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-class.html" ><TT CLASS="STRUCTNAME" >pg_class</TT ></A >.oid</TT ></TD ><TD >Array of <TT CLASS="TYPE" >regclass</TT > OIDs for the extension's configuration table(s), or <TT CLASS="LITERAL" >NULL</TT > if none</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >extcondition</TT ></TD ><TD ><TT CLASS="TYPE" >text[]</TT ></TD ><TD > </TD ><TD >Array of <TT CLASS="LITERAL" >WHERE</TT >-clause filter conditions for the extension's configuration table(s), or <TT CLASS="LITERAL" >NULL</TT > if none</TD ></TR ></TBODY ></TABLE ></DIV ><P > Note that unlike most catalogs with a <SPAN CLASS="QUOTE" >"namespace"</SPAN > column, <TT CLASS="STRUCTFIELD" >extnamespace</TT > is not meant to imply that the extension belongs to that schema. Extension names are never schema-qualified. Rather, <TT CLASS="STRUCTFIELD" >extnamespace</TT > indicates the schema that contains most or all of the extension's objects. If <TT CLASS="STRUCTFIELD" >extrelocatable</TT > is true, then this schema must in fact contain all schema-qualifiable objects belonging to the extension. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="catalog-pg-event-trigger.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="catalog-pg-foreign-data-wrapper.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><TT CLASS="STRUCTNAME" >pg_event_trigger</TT ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="catalogs.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><TT CLASS="STRUCTNAME" >pg_foreign_data_wrapper</TT ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >