On 14 June 2011 06:39, Stefan Keller <sfkeller@xxxxxxxxx> wrote:
> Hi
>
> I observed some strange behaviour when adding a primary key with ALTER TABLE:
>
> Given CREATE TABLE mytable1 (id serial, name text);
> I filled it with data then did a
> CREATE TABLE mytable2 AS SELECT * FROM mytable1;
> ALTER TABLE mytable2 ADD PRIMARY KEY(id);
>
> The last command reports - as usual - that implicitly an index on id
> ("mytable_pkey") was created - but it did not! It adds only a primary
> key constraint on id. Can anybody explain this?
>
> Yours, S.
>
> P.S. I have installed "PostgreSQL 9.1alpha1, compiled by Visual C++
> build 1500, 32-bit".
Shouldn't you be looking for mytable2_pkey?
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