<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >pg_pltemplate</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 9.6.21 Documentation" HREF="index.html"><LINK REL="UP" TITLE="System Catalogs" HREF="catalogs.html"><LINK REL="PREVIOUS" TITLE="pg_opfamily" HREF="catalog-pg-opfamily.html"><LINK REL="NEXT" TITLE="pg_policy" HREF="catalog-pg-policy.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="2021-02-27T18:26:08"></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 9.6.21 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="pg_opfamily" HREF="catalog-pg-opfamily.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_policy" HREF="catalog-pg-policy.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="CATALOG-PG-PLTEMPLATE" >50.36. <TT CLASS="STRUCTNAME" >pg_pltemplate</TT ></A ></H1 ><P > The catalog <TT CLASS="STRUCTNAME" >pg_pltemplate</TT > stores <SPAN CLASS="QUOTE" >"template"</SPAN > information for procedural languages. A template for a language allows the language to be created in a particular database by a simple <TT CLASS="COMMAND" >CREATE LANGUAGE</TT > command, with no need to specify implementation details. </P ><P > Unlike most system catalogs, <TT CLASS="STRUCTNAME" >pg_pltemplate</TT > is shared across all databases of a cluster: there is only one copy of <TT CLASS="STRUCTNAME" >pg_pltemplate</TT > per cluster, not one per database. This allows the information to be accessible in each database as it is needed. </P ><DIV CLASS="TABLE" ><A NAME="AEN109080" ></A ><P ><B >Table 50-36. <TT CLASS="STRUCTNAME" >pg_pltemplate</TT > Columns</B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><COL><THEAD ><TR ><TH >Name</TH ><TH >Type</TH ><TH >Description</TH ></TR ></THEAD ><TBODY ><TR ><TD ><TT CLASS="STRUCTFIELD" >tmplname</TT ></TD ><TD ><TT CLASS="TYPE" >name</TT ></TD ><TD >Name of the language this template is for</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >tmpltrusted</TT ></TD ><TD ><TT CLASS="TYPE" >boolean</TT ></TD ><TD >True if language is considered trusted</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >tmpldbacreate</TT ></TD ><TD ><TT CLASS="TYPE" >boolean</TT ></TD ><TD >True if language may be created by a database owner</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >tmplhandler</TT ></TD ><TD ><TT CLASS="TYPE" >text</TT ></TD ><TD >Name of call handler function</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >tmplinline</TT ></TD ><TD ><TT CLASS="TYPE" >text</TT ></TD ><TD >Name of anonymous-block handler function, or null if none</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >tmplvalidator</TT ></TD ><TD ><TT CLASS="TYPE" >text</TT ></TD ><TD >Name of validator function, or null if none</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >tmpllibrary</TT ></TD ><TD ><TT CLASS="TYPE" >text</TT ></TD ><TD >Path of shared library that implements language</TD ></TR ><TR ><TD ><TT CLASS="STRUCTFIELD" >tmplacl</TT ></TD ><TD ><TT CLASS="TYPE" >aclitem[]</TT ></TD ><TD >Access privileges for template (not actually used)</TD ></TR ></TBODY ></TABLE ></DIV ><P > There are not currently any commands that manipulate procedural language templates; to change the built-in information, a superuser must modify the table using ordinary <TT CLASS="COMMAND" >INSERT</TT >, <TT CLASS="COMMAND" >DELETE</TT >, or <TT CLASS="COMMAND" >UPDATE</TT > commands. </P ><DIV CLASS="NOTE" ><BLOCKQUOTE CLASS="NOTE" ><P ><B >Note: </B > It is likely that <TT CLASS="STRUCTNAME" >pg_pltemplate</TT > will be removed in some future release of <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN >, in favor of keeping this knowledge about procedural languages in their respective extension installation scripts. </P ></BLOCKQUOTE ></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-opfamily.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-policy.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><TT CLASS="STRUCTNAME" >pg_opfamily</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_policy</TT ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >