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Subject: Re: [INTERFACES] Re: thread-safe libpq and DBD::Pg
References: <26919.902847103@sss.pgh.pa.us> <35D0763C.C5D2DBF8@trust.ee>
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Reply-To: emarsden@mail.dotcom.fr
From: Eric Marsden <emarsden@mail.dotcom.fr>
Date: 12 Aug 1998 16:29:14 +0200
In-Reply-To: Hannu Krosing's message of "Tue, 11 Aug 1998 19:50:04 +0300"
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>>>>> "HK" == Hannu Krosing <hannu@trust.ee> writes:
>>>>> "TL" == Tom Lane <tgl@sss.pgh.pa.us> writes:

  TL> The present libpgtcl is NOT pure Tcl --- it is a C-coded Tcl
  TL> extension, besides which it is layered on top of libpq.

This is my impression too: in postgresql-6.3.2/src/interfaces/libpgtcl/ 
there are C files which reference functions like PQconnectdb. However,
the documentation for libpgtcl states (this is from the top of
postgresql-6.3.2/doc/src/sgml/libpgtcl.sgml)

   pgtcl is a tcl package for front-end programs to interface with
   <ProductName>Postgres</ProductName> backends. pgtcl does not use
   the libpq library but communicates to the backend directly via the
   frontend-backend protocol. Thus, it is more efficient than previous
   postgres->tcl bindings which are layered on top of libpq. In
   addition, pgtcl can handle multiple backend connections from a
   single frontend application.

The documentation looks wrong, or perhaps it is talking about a
development version of libpgtcl? Should I report a documentation bug?

  
  HK> I've got the impression that there is currently a pure Tcl interface 
  HK> as well that some use with pgAccess on win32.

This is ftp://ftp.flex.ro/pub/pgaccess/pgsql.tcl (Tcl interface at the
socket level).

-- 
Eric Marsden
emarsden @ mail.dotcom.fr
It's elephants all the way down