Chapter 46. PL/Python - Python Procedural Language
Table of Contents
The PL/Python procedural language allows PostgreSQL functions to be written in the Python language .
To install PL/Python in a particular database, use
CREATE EXTENSION plpythonu
(but
see also
Section 46.1
).
Tip
If a language is installed into
template1
, all subsequently
created databases will have the language installed automatically.
PL/Python is only available as an
"
untrusted
"
language, meaning
it does not offer any way of restricting what users can do in it and
is therefore named
plpythonu
. A trusted
variant
plpython
might become available in the future
if a secure execution mechanism is developed in Python. The
writer of a function in untrusted PL/Python must take care that the
function cannot be used to do anything unwanted, since it will be
able to do anything that could be done by a user logged in as the
database administrator. Only superusers can create functions in
untrusted languages such as
plpythonu
.
Note
Users of source packages must specially enable the build of PL/Python during the installation process. (Refer to the installation instructions for more information.) Users of binary packages might find PL/Python in a separate subpackage.