Re: [HACKERS] Packages in oracle Style

coutinho@mondriantecnologia.com wrote:
> I have implemented a solution for global variables implemented in plpython and I need implement this in c :)

The below listed tarball is out of date at this point, but I have
updated code laying around if someone really wanted it:

http://www.joeconway.com/sessfunc.tar.gz
I've used variations of this over the years on several projects.

I've also (mis)used custom configs, e.g. in a plpgsql function:

8<----------------------------
EXECUTE 'set myvars.var1 to ''' || p_var1 || '''';
8<----------------------------

and in your "get session var" C function:

8<----------------------------
#define GET_SESSVAR_BY_NAME(SESS_VAR_NAME) \
do { \
SESS_VAR_NAME = GetConfigOptionByName("myvars." #SESS_VAR_NAME, \
NULL); \
if (!SESS_VAR_NAME) \
elog(ERROR, "Missing session variable: " #SESS_VAR_NAME); \
} while (0)

char *var1 = GET_SESSVAR_BY_NAME(var1);
8<----------------------------

Joe

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