On 07/05/2013 12:29 AM, giozh wrote:
so thanks to all for the answers. But i'm going to be frustrated, no one of
your solutions seems to work, and i can't understand why, because i've write
another two functions that works well...
I always obtain error: or unknown function (if i pass args without ' ') or
"column not exist".

So does it work if you quote the table_name and table_column names?
Have you changed the data type to varchar?

i've noticed that on my postgres server, there's two database: one i've
created for my scope, and another named postgres (i think created by
default). Maybe should i specify on wich database my function should work
(also if  function compare only inside my personal database)?

Functions are created per database, To be more precise per schema in a database. Functions can be overloaded, so it is possible there is more than one in your database.

To check do the following from the psql propmpt:

 \df check_if_if_exist



--
Adrian Klaver
adrian.kla...@gmail.com


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