From: | Jeff MacDonald <jeff(at)pgsql(dot)com> |
---|---|
To: | pgsql-hackers(at)postgresql(dot)org |
Subject: | ordbms - postgresql errata |
Date: | 2000-09-19 04:45:30 |
Message-ID: | Pine.BSF.4.21.0009190139160.766-100000@rage.hub.org |
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Lists: | pgsql-hackers |
i just found a (few) caveat already..
1:
bignose=# create table people(
bignose(# name varchar(64),
bignose(# age int8,
bignose(# sin int4,
bignose(# id serial);
bignose=# create table soldier(
bignose(# rank varchar(32),
bignose(# post varchar(32)) inherits (people);
bignose=# alter table people add column gender int2;
ALTER
bignose=# \d soldier
Table "soldier"
Attribute | Type | Modifier
-----------+-------------+-------------------------------------------------
name | varchar(64) |
age | bigint |
sin | integer |
id | integer | not null default nextval('people_id_seq'::text)
rank | varchar(32) |
post | varchar(32) |
now you can see that the attribute was added to the super class
but the sub class didn't inhereit..
----------- NEXT -------------
bignose=# insert into soldier (name,age,sin) values
bignose-# ('fred',19,12321);
bignose=# select p.* from people* p;
name | age | sin | id | gender
------+-----+-------+----+--------
fred | 19 | 12321 | 1 | -16968
i didn't specify a gender, but it put in a "randomish" value..
shouldn't it have just left this untouched ?
Jeff MacDonald,
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