How to identify the class of a record

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От Andre Fortin
Тема How to identify the class of a record
Дата
Msg-id 3A4E503C.4ADA926A@axionet.com
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Ответы Re: How to identify the class of a record  (Peter Eisentraut <peter_e@gmx.net>)
Список pgsql-general
Hi!,


Here is a scenario. The database contains 3 tables: the parent table is
Equipment with tables Computers and Monitors inheriting from it.

    CREATE TABLE Equipment (...);
    CREATE TABLE Computers (...) INHERITS (Equipment);
    CREATE TABLE Monitors  (...) INHERITS (Equipment);


When doing a SELECT on the parent with the asterisk suffix syntax, we
get rows from Computer and Monitor.

    SELECT * from Equipment*;

Is there a way to know from which table each row in the returned record
set belongs to, as you can do with OO languages. If this is possible,
could you point where more information could be located on this type of
design when working with Postgres.

Thanks,

-- Andre

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