It doesn't seem to be possible to find out if a parameter or result
field is nullable using the Describe protocol.
For example if I have this table and statement:
create table employees ( id serial not null primary key, name text not null, email text
<-- this field );
insert into employees (name, email) values ($1, $2);
Then the only information I get back about $2 is that it's a TEXT (OID
= 25), when clearly $1 and $2 are different in that one is nullable
and the other isn't.
Similarly,
select name, email from employees;
This time I get more information about the types, including a modifier
and length, but I can't see whether that lets me find out that one
could be NULL and the other can never be.
So is this possible?
Rich.
--
Richard Jones, CTO Merjis Ltd.
Merjis - web marketing and technology - http://merjis.com
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