Re: SELECT FOR UPDATE locks whole table

It should lock only the rows you retrieved, but I have no idea how FOR
UPDATE and INTO TEMP behave. My guess is that it should work fine, but
I have never seen those two used together before.

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D'Arcy J.M. Cain wrote:
> We have the following query:
>
> SELECT certificate_id
> INTO TEMP TABLE x_certs
> FROM certificate
> WHERE cert_status = 0 AND
> certificate_id BETWEEN 1111 AND 2222 AND
> client_id IN (1, 2, 3)
> ORDER BY certificate_id
> FOR UPDATE;
>
> Is there any reason that this query should lock the entire certificate table?
> Is there something strange because of the IN clause or because it is going
> into a temporary table? This is a production server running 7.2.2 so perhaps
> it is fixed in 7.3.
>
> --
> D'Arcy J.M. Cain <darcy(at){druid|vex}.net> | Democracy is three wolves
> http://www.druid.net/darcy/ | and a sheep voting on
> +1 416 425 1212 (DoD#0082) (eNTP) | what's for dinner.
>
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