<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >pg_operator</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 8.0.11 Documentation" HREF="index.html"><LINK REL="UP" TITLE="System Catalogs" HREF="catalogs.html"><LINK REL="PREVIOUS" TITLE="pg_opclass" HREF="catalog-pg-opclass.html"><LINK REL="NEXT" TITLE="pg_proc" HREF="catalog-pg-proc.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="2007-02-02T03:57:22"></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" >PostgreSQL 8.0.11 Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="catalog-pg-opclass.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="catalogs.html" >Fast Backward</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" >Chapter 41. System Catalogs</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="catalogs.html" >Fast Forward</A ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="catalog-pg-proc.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="CATALOG-PG-OPERATOR" >41.23. <TT CLASS="STRUCTNAME" >pg_operator</TT ></A ></H1 ><A NAME="AEN53967" ></A ><P > The catalog <TT CLASS="STRUCTNAME" >pg_operator</TT > stores information about operators. See <A HREF="sql-createoperator.html" ><I >CREATE OPERATOR</I ></A > and <A HREF="xoper.html" >Section 31.12</A > for more information. </P ><DIV CLASS="TABLE" ><A NAME="AEN53973" ></A ><P ><B >Table 41-23. <TT CLASS="STRUCTNAME" >pg_operator</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" >oprname</TT ></TD ><TD ><TT CLASS="TYPE" >name</TT ></TD ><TD > </TD ><TD >Name of the operator</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprnamespace</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 > The OID of the namespace that contains this operator </TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprowner</TT ></TD ><TD ><TT CLASS="TYPE" >int4</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-shadow.html" ><TT CLASS="STRUCTNAME" >pg_shadow</TT ></A >.usesysid</TT ></TD ><TD >Owner of the operator</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprkind</TT ></TD ><TD ><TT CLASS="TYPE" >char</TT ></TD ><TD > </TD ><TD > <TT CLASS="LITERAL" >b</TT > = infix (<SPAN CLASS="QUOTE" >"both"</SPAN >), <TT CLASS="LITERAL" >l</TT > = prefix (<SPAN CLASS="QUOTE" >"left"</SPAN >), <TT CLASS="LITERAL" >r</TT > = postfix (<SPAN CLASS="QUOTE" >"right"</SPAN >) </TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprcanhash</TT ></TD ><TD ><TT CLASS="TYPE" >bool</TT ></TD ><TD > </TD ><TD >This operator supports hash joins</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprleft</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-type.html" ><TT CLASS="STRUCTNAME" >pg_type</TT ></A >.oid</TT ></TD ><TD >Type of the left operand</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprright</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-type.html" ><TT CLASS="STRUCTNAME" >pg_type</TT ></A >.oid</TT ></TD ><TD >Type of the right operand</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprresult</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-type.html" ><TT CLASS="STRUCTNAME" >pg_type</TT ></A >.oid</TT ></TD ><TD >Type of the result</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprcom</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-operator.html" ><TT CLASS="STRUCTNAME" >pg_operator</TT ></A >.oid</TT ></TD ><TD >Commutator of this operator, if any</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprnegate</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-operator.html" ><TT CLASS="STRUCTNAME" >pg_operator</TT ></A >.oid</TT ></TD ><TD >Negator of this operator, if any</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprlsortop</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-operator.html" ><TT CLASS="STRUCTNAME" >pg_operator</TT ></A >.oid</TT ></TD ><TD > If this operator supports merge joins, the operator that sorts the type of the left-hand operand (<TT CLASS="LITERAL" >L<L</TT >) </TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprrsortop</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-operator.html" ><TT CLASS="STRUCTNAME" >pg_operator</TT ></A >.oid</TT ></TD ><TD > If this operator supports merge joins, the operator that sorts the type of the right-hand operand (<TT CLASS="LITERAL" >R<R</TT >) </TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprltcmpop</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-operator.html" ><TT CLASS="STRUCTNAME" >pg_operator</TT ></A >.oid</TT ></TD ><TD > If this operator supports merge joins, the less-than operator that compares the left and right operand types (<TT CLASS="LITERAL" >L<R</TT >) </TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprgtcmpop</TT ></TD ><TD ><TT CLASS="TYPE" >oid</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-operator.html" ><TT CLASS="STRUCTNAME" >pg_operator</TT ></A >.oid</TT ></TD ><TD > If this operator supports merge joins, the greater-than operator that compares the left and right operand types (<TT CLASS="LITERAL" >L>R</TT >) </TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprcode</TT ></TD ><TD ><TT CLASS="TYPE" >regproc</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-proc.html" ><TT CLASS="STRUCTNAME" >pg_proc</TT ></A >.oid</TT ></TD ><TD >Function that implements this operator</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprrest</TT ></TD ><TD ><TT CLASS="TYPE" >regproc</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-proc.html" ><TT CLASS="STRUCTNAME" >pg_proc</TT ></A >.oid</TT ></TD ><TD >Restriction selectivity estimation function for this operator</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >oprjoin</TT ></TD ><TD ><TT CLASS="TYPE" >regproc</TT ></TD ><TD ><TT CLASS="LITERAL" ><A HREF="catalog-pg-proc.html" ><TT CLASS="STRUCTNAME" >pg_proc</TT ></A >.oid</TT ></TD ><TD >Join selectivity estimation function for this operator</TD ></TR ></TBODY ></TABLE ></DIV ><P > Unused column contain zeroes, for example <TT CLASS="STRUCTFIELD" >oprleft</TT > is zero for a prefix operator. </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-opclass.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-proc.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><TT CLASS="STRUCTNAME" >pg_opclass</TT ></TD ><TD 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