File readme.SUSE of Package postgresql94-plr

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File readme.SUSE of Package postgresql94-plr

Quick howto plr

You can use plr.sql (which is created in contrib/plr) to create the language 
and support functions in your database of choice:

psql -U <authorized user> -d <target database> -f /usr/share/postgresql/contrib/plr.sql
   
Alternatively you can create the language manually using SQL commands:

CREATE FUNCTION plr_call_handler()
	RETURNS LANGUAGE_HANDLER
	AS '$libdir/plr' LANGUAGE C;

CREATE LANGUAGE plr HANDLER plr_call_handler;
   
As of PostgreSQL 9.1 you can use the new CREATE EXTENSION command:

CREATE EXTENSION plr;
   
This is not only simple, it has the added advantage of tracking all PL/R 
installed objects as dependent on the extension, and therefore they can be 
removed just as easily if desired:

DROP EXTENSION plr;

For upgrade, as the new version didn't add or remove function, installing the new
plr.so extension, should provide directly the new version.
This can be checked with select plr_version();
  
Tip: If a language is installed into template1, all subsequently created 
databases will have the language installed automatically.

Tip: In addition to the documentation, the plr.out.* files in
plr/expected are a good source of usage examples.

Tip: Additionally, libR must be findable by your runtime linker. On Linux, 
this involves adding an entry in /etc/ld.so.conf for the location of libR 
(typically $R_HOME/bin or $R_HOME/lib), and then running ldconfig. 
Refer to man ldconfig or its equivalent for your system.

Tip: R_HOME must be defined in the environment of the user under which PostgreSQL 
is started, before the postmaster is started. Otherwise PL/R will refuse to load. 
See plr_environ(), which allows examination of the environment available to the 
PostgreSQL postmaster process.

Testing you plr extension 
	psql -d <target database> -c "select * from plr_environ();"

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