Dmitry Ruban <[EMAIL PROTECTED]> writes:
> I'm trying to find a solution for unique index on fields with possible
> null values.
You appear to be hoping that a unique index would constrain a column to
contain at most one null entry. It doesn't work like that, and I
strongly urge you to reconsider
Hello pgsql-sql,
I'm trying to find a solution for unique index on fields with possible
null values.
Example table:
CREATE TABLE test (
a integer NOT NULL,
b integer NULL
);
As long as unique index can't check if there are records with null
values i found the only one solution for this proble
