On Fri, Mar 9, 2012 at 8:50 PM,  <spa...@yum.pl> wrote:

> CREATE EXTENSION ltree;
> ERROR:  permission denied to create extension "ltree"
> HINT:  Must be superuser to create this extension.
>
> Why does ltree require superuser privledge? Is it dangerous and allow
> circumventing server security? No mention of this in manual so it is either
> documentation problem or a too strict check problem.

The bulk of ltree--1.0.sql contains commands which must be executed by
superuser (e.g. creating C language functions, or CREATE OPERATOR
CLASS).

And the text for appendix F[1] does in fact mention that contrib
modules will need to be installed by a superuser, so this restriction
is not entirely undocumented.

Josh

[1] http://www.postgresql.org/docs/devel/static/contrib.html

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