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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >PL/Tcl - Tcl Procedural Language</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 9.2.24 Documentation" HREF="index.html"><LINK REL="UP" TITLE="Server Programming" HREF="server-programming.html"><LINK REL="PREVIOUS" TITLE="Porting from Oracle PL/SQL" HREF="plpgsql-porting.html"><LINK REL="NEXT" TITLE="Overview" HREF="pltcl-overview.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="2017-11-06T22:43:11"></HEAD ><BODY CLASS="CHAPTER" ><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 9.2.24 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="Porting from Oracle PL/SQL" HREF="plpgsql-porting.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="server-programming.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="Overview" HREF="pltcl-overview.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="CHAPTER" ><H1 ><A NAME="PLTCL" ></A >Chapter 40. PL/Tcl - Tcl Procedural Language</H1 ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT >40.1. <A HREF="pltcl-overview.html" >Overview</A ></DT ><DT >40.2. <A HREF="pltcl-functions.html" >PL/Tcl Functions and Arguments</A ></DT ><DT >40.3. <A HREF="pltcl-data.html" >Data Values in PL/Tcl</A ></DT ><DT >40.4. <A HREF="pltcl-global.html" >Global Data in PL/Tcl</A ></DT ><DT >40.5. <A HREF="pltcl-dbaccess.html" >Database Access from PL/Tcl</A ></DT ><DT >40.6. <A HREF="pltcl-trigger.html" >Trigger Procedures in PL/Tcl</A ></DT ><DT >40.7. <A HREF="pltcl-unknown.html" >Modules and the <CODE CLASS="FUNCTION" >unknown</CODE > Command</A ></DT ><DT >40.8. <A HREF="pltcl-procnames.html" >Tcl Procedure Names</A ></DT ></DL ></DIV ><P > PL/Tcl is a loadable procedural language for the <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN > database system that enables the <A HREF="http://www.tcl.tk/" TARGET="_top" > Tcl language</A > to be used to write functions and trigger procedures. </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="plpgsql-porting.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="pltcl-overview.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Porting from <SPAN CLASS="PRODUCTNAME" >Oracle</SPAN > PL/SQL</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="server-programming.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Overview</TD ></TR ></TABLE ></DIV ></BODY ></HTML >