From: | Ron Johnson <ron(dot)l(dot)johnson(at)cox(dot)net> |
---|---|
To: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: postgresql vs mysql |
Date: | 2007-02-22 23:46:42 |
Message-ID: | 45DE2B62.9040504@cox.net |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
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On 02/22/07 17:17, Jim Nasby wrote:
> On Feb 21, 2007, at 10:26 AM, Scott Marlowe wrote:
>> The only thing I can think of that rewrites a whole postgresql table
>> would be reindexing it, or an update without a where clause (or a where
>> clause that includes every row). Normal operations, like create index,
>> add column, drop column, etc do not need to rewrite the table and happen
>> almost instantly.
>
> Reindexing won't re-write a table; clustering will. Also some ALTER
> TABLE commands will (such as changing the data type of a column, or
> creating a new column that's NOT NULL).
Man, that's just Not Right.
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