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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>43.12. Tcl Procedure Names</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="pltcl-config.html" title="43.11. PL/Tcl Configuration" /><link rel="next" href="plperl.html" title="Chapter 44. PL/Perl — Perl Procedural Language" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">43.12. Tcl Procedure Names</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="pltcl-config.html" title="43.11. PL/Tcl Configuration">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="pltcl.html" title="Chapter 43. PL/Tcl — Tcl Procedural Language">Up</a></td><th width="60%" align="center">Chapter 43. PL/Tcl — Tcl Procedural Language</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="plperl.html" title="Chapter 44. PL/Perl — Perl Procedural Language">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="PLTCL-PROCNAMES"><div class="titlepage"><div><div><h2 class="title" style="clear: both">43.12. Tcl Procedure Names</h2></div></div></div><p>
In <span class="productname">PostgreSQL</span>, the same function name can be used for
different function definitions as long as the number of arguments or their types
differ. Tcl, however, requires all procedure names to be distinct.
PL/Tcl deals with this by making the internal Tcl procedure names contain
the object
ID of the function from the system table <code class="structname">pg_proc</code> as part of their name. Thus,
<span class="productname">PostgreSQL</span> functions with the same name
and different argument types will be different Tcl procedures, too. This
is not normally a concern for a PL/Tcl programmer, but it might be visible
when debugging.
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