working with arrays inside a plpgsql function

["Luis Silva" <lfs12(at)hotmail(dot)com>]

Hi all!

I'm trying to use array inside a pl/pgsql function and I'm having some 
problems using the all array at the same time. Let me give you an example:

ident text[];

BEGIN

ident = $1;  -- $1 is a array argument from the plpgsql function
EXECUTE 'SELECT count(identity) FROM public_data WHERE identity IN ||ident 
INTO asds;


This last query returns an error. Any guess to solve this problem? tks a lot
PS - How can I retrieved the size ofthe array? I saw the manual and I 
couldn't find it.

Regards,

Luís

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