<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >pg_shdescription</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 9.6.10 Documentation" HREF="index.html"><LINK REL="UP" TITLE="System Catalogs" HREF="catalogs.html"><LINK REL="PREVIOUS" TITLE="pg_shdepend" HREF="catalog-pg-shdepend.html"><LINK REL="NEXT" TITLE="pg_shseclabel" HREF="catalog-pg-shseclabel.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="2018-10-16T23:40:43"></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 9.6.10 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="pg_shdepend" HREF="catalog-pg-shdepend.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_shseclabel" HREF="catalog-pg-shseclabel.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="CATALOG-PG-SHDESCRIPTION" >50.44. <TT CLASS="STRUCTNAME" >pg_shdescription</TT ></A ></H1 ><P > The catalog <TT CLASS="STRUCTNAME" >pg_shdescription</TT > stores optional descriptions (comments) for shared database objects. 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. </P ><P > See also <A HREF="catalog-pg-description.html" ><TT CLASS="STRUCTNAME" >pg_description</TT ></A >, which performs a similar function for descriptions involving objects within a single database. </P ><P > Unlike most system catalogs, <TT CLASS="STRUCTNAME" >pg_shdescription</TT > is shared across all databases of a cluster: there is only one copy of <TT CLASS="STRUCTNAME" >pg_shdescription</TT > per cluster, not one per database. </P ><DIV CLASS="TABLE" ><A NAME="AEN109356" ></A ><P ><B >Table 50-44. <TT CLASS="STRUCTNAME" >pg_shdescription</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" >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-shdepend.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-shseclabel.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><TT CLASS="STRUCTNAME" >pg_shdepend</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_shseclabel</TT ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >