<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >pg_description</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 9.2.5 Documentation" HREF="index.html"><LINK REL="UP" TITLE="System Catalogs" HREF="catalogs.html"><LINK REL="PREVIOUS" TITLE="pg_depend" HREF="catalog-pg-depend.html"><LINK REL="NEXT" TITLE="pg_enum" HREF="catalog-pg-enum.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="2013-10-08T03:47:12"></HEAD ><BODY CLASS="SECT1" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.2.5 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="pg_depend" HREF="catalog-pg-depend.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 45. System Catalogs</TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="pg_enum" HREF="catalog-pg-enum.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="CATALOG-PG-DESCRIPTION" >45.19. <TT CLASS="STRUCTNAME" >pg_description</TT ></A ></H1 ><P > The catalog <TT CLASS="STRUCTNAME" >pg_description</TT > stores optional descriptions (comments) for each database object. Descriptions can be manipulated with the <A HREF="sql-comment.html" >COMMENT</A > command and viewed with <SPAN CLASS="APPLICATION" >psql</SPAN >'s <TT CLASS="LITERAL" >\d</TT > commands. Descriptions of many built-in system objects are provided in the initial contents of <TT CLASS="STRUCTNAME" >pg_description</TT >. </P ><P > See also <A HREF="catalog-pg-shdescription.html" ><TT CLASS="STRUCTNAME" >pg_shdescription</TT ></A >, which performs a similar function for descriptions involving objects that are shared across a database cluster. </P ><DIV CLASS="TABLE" ><A NAME="AEN90102" ></A ><P ><B >Table 45-19. <TT CLASS="STRUCTNAME" >pg_description</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" >objoid</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD >any OID column</TD ><TD >The OID of the object this description pertains to</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >classoid</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 >The OID of the system catalog this object appears in</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >objsubid</TT ></TD ><TD ><TT CLASS="TYPE" >int4</TT ></TD ><TD > </TD ><TD > For a comment on a table column, this is the column number (the <TT CLASS="STRUCTFIELD" >objoid</TT > and <TT CLASS="STRUCTFIELD" >classoid</TT > refer to the table itself). For all other object types, this column is zero. </TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >description</TT ></TD ><TD ><TT CLASS="TYPE" >text</TT ></TD ><TD > </TD ><TD >Arbitrary text that serves as the description of this object</TD ></TR ></TBODY ></TABLE ></DIV ></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-depend.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-enum.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><TT CLASS="STRUCTNAME" >pg_depend</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_enum</TT ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >