Fw: Whats happen here?

> Whats happen here?
> -------------------------
>
> root=> \dt
>
> Database    = root
>  +------------------+----------------------------------+----------+
>  |  Owner           |             Relation             |   Type   |
>  +------------------+----------------------------------+----------+
>  | root             | x                                | table    |
>  | root             | y                                | table    |
>  +------------------+----------------------------------+----------+
> root=> \d x
>
> Table    = x
>
+----------------------------------+----------------------------------+-----
> --+
> |              Field               |              Type                |
> Length|
>
+----------------------------------+----------------------------------+-----
> --+
> | a                                | char()                           |
> 20 |
>
+----------------------------------+----------------------------------+-----
> --+
> root=> \d y
>
> Table    = y
>
+----------------------------------+----------------------------------+-----
> --+
> |              Field               |              Type                |
> Length|
>
+----------------------------------+----------------------------------+-----
> --+
> | a                                | varchar()                        |
> 5 |
>
+----------------------------------+----------------------------------+-----
> --+
> root=>select * from x a, y b where a.a = b.a;
> ERROR:  There is more than one possible operator '=' for types 'bpchar'
and
> 'varchar'
>         You will have to retype this query using an explicit cast
>
>
>
> root=> select * from x a, y b where text(a.a) = text(b.b);
>ERROR:  There is more than one possible operator '=' for types 'bpchar' and
'varchar'
>        You will have to retype this query using an explicit cast
>
> --------------------------------------------------------------
> The reboots are for hardware upgrades!
> "http://www.nmmm.nu; <nmmm@nmmm.nu>
>
>