Re: enum bug - Mailing list pgsql-general

> Bug/Improvement:
>
>    Enums belong to types, not to column values.
>
>    * Create a built in function, like enum_range( type ), independent of tables
>      that shows a type's enum values.
>        create or replace function enum_range( typein regtype ) returns name[] language sql as
>        $$
>        select array_agg(enumlabel) from
>            (select enumlabel
>            from pg_enum e join pg_type t on (e.enumtypid = t.oid)
>            where t.typtype = 'e' and t.oid = typein
>            order by enumsortorder
>            ) foo;
>        $$;
>    * When an insert into an enum column fails give the person a hint as to valid values
>    * Make enum_range to not be dependent on values in the target table.
>      Remove/Obsolete enum_range( enum_column ) and replace with enum_range( typein regtype )
>
>    Workaround: define the enum_range( typein regtyp ) yourself.
>
>
> create type rainbow as enum ('red','orange','yellow','blue','purple');
> CREATE TYPE
> create table badinfo (color rainbow);
> CREATE TABLE
>
> -- Lousy message.  Show enum list.
> insert into badinfo values ('green');
> ERROR:  invalid input value for enum rainbow: "green"
> LINE 1: insert into badinfo values ('green');
>
>
> -- Lousy message.
> select enum_range(color) from foo;
> enum_range
> ------------
> (0 rows)
>
> insert into foo values ('red');
> INSERT 0 1
> insert into foo values ('blue');
> INSERT 0 1
>
> -- Ooh.  Only shows the enum list for valid value in a table.
> select enum_range(color) from foo;
>           enum_range
> ---------------------------------
> {red,orange,yellow,blue,purple}
> {red,orange,yellow,blue,purple}
> (2 rows)
Elein Mustain
elein@varlena.com
510-637-9106

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