diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/src/sgml/plperl.sgml | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/doc/src/sgml/plperl.sgml b/doc/src/sgml/plperl.sgml index 8e834b08197..aa3838698d8 100644 --- a/doc/src/sgml/plperl.sgml +++ b/doc/src/sgml/plperl.sgml @@ -1,5 +1,5 @@ <!-- -$Header: /cvsroot/pgsql/doc/src/sgml/plperl.sgml,v 2.20 2003/08/31 17:32:19 petere Exp $ +$Header: /cvsroot/pgsql/doc/src/sgml/plperl.sgml,v 2.20.2.1 2010/05/13 16:44:35 adunstan Exp $ --> <chapter id="plperl"> @@ -259,7 +259,26 @@ CREATE FUNCTION badfunc() RETURNS integer AS ' If the above function was created by a superuser using the language <literal>plperlu</>, execution would succeed. </para> - </sect1> + + <note> + <para> + For security reasons, to stop a leak of privileged operations from + <application>PL/PerlU</> to <application>PL/Perl</>, these two languages + have to run in separate instances of the Perl interpreter. If your + Perl installation has been appropriately compiled, this is not a problem. + However, not all installations are compiled with the requisite flags. + If <productname>PostgreSQL</> detects that this is the case then it will + not start a second interpreter, but instead create an error. In + consequence, in such an installation, you cannot use both + <application>PL/PerlU</> and <application>PL/Perl</> in the same backend + process. The remedy for this is to obtain a Perl installation created + with the appropriate flags, namely either <literal>usemultiplicity</> or + both <literal>usethreads</> and <literal>useithreads</>. + For more details,see the <literal>perlembed</> manual page. + </para> + </note> + +</sect1> <sect1 id="plperl-missing"> <title>Missing Features</title> |