| From: | Frank Millman <frank(at)chagford(dot)com> |
|---|---|
| To: | pgsql-general(at)lists(dot)postgresql(dot)org |
| Subject: | Re: Question about locking |
| Date: | 2022-08-07 06:22:22 |
| Message-ID: | 080a1a96-a4df-fb73-cae9-44c58258b927@chagford.com |
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| Lists: | pgsql-general |
On 2022-08-07 7:54 AM, Ron wrote:
> On 8/7/22 00:30, Frank Millman wrote:
>> Hi all
>>
>> Apologies if this is an FAQ, but I could not find the answer I was
>> looking for.
>>
>> I want to run two SELECTs, one immediately after the other.
>>
>> I want to ensure that no other process updates the database in
>> between the two.
>>
>> What is the best way to achieve this?
>
> You probably want to put the queries in a Repeatable Read transaction,
> or even a READ ONLY serialized transaction.
> https://www.postgresql.org/docs/12/transaction-iso.html#XACT-REPEATABLE-READ
>
> https://www.postgresql.org/docs/12/transaction-iso.html#XACT-SERIALIZABLE
> https://www.postgresql.org/docs/12/sql-set-transaction.html
>
Thanks, Ron. That is exactly what I am looking for.
Frank
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