Обсуждение: Is there an equivalent to sp_getapplock, sp_releaseapplock in PostgreSql?
In MSSQL I am using sp_getapplock, sp_releaseapplock.
How can I achieve the same functionality in PostgreSql?
Re: Is there an equivalent to sp_getapplock, sp_releaseapplock inPostgreSql?
От
Andrei Zhidenkov
Дата:
I’m not sure what these function exactly do in MSSQL but what in Postgres you probably can use “Advisory Locks” (https://www.postgresql.org/docs/9.4/explicit-locking.html) in order to achive this.
On 13. Dec 2019, at 13:31, İlyas Derse <ilyasderse@gmail.com> wrote:sp_getapplock
Hi Ityas
Advisory locks do not act like the locks in MSSQL, Postgresql will ignore advisory locks for other transactions, its up the applications layer to poll/ obey/ enforce advisory locks
You can do the type of locking as in MSSQL with Postgresql but its avoided in practice as that is the point of MVCC, allow the database to handle locking/updating of resources. Odds of Deadlocks go way down...
Postgresql has always run in the optional MSSQL Snap Shot Isolation Mode https://docs.microsoft.com/en-us/dotnet/framework/data/adonet/sql/snapshot-isolation-in-sql-server
I think MSSQL is now the only major database still shipped with MVCC turned off..
On Fri, Dec 13, 2019 at 9:06 AM Andrei Zhidenkov <andrei.zhidenkov@n26.com> wrote:
I’m not sure what these function exactly do in MSSQL but what in Postgres you probably can use “Advisory Locks” (https://www.postgresql.org/docs/9.4/explicit-locking.html) in order to achive this.On 13. Dec 2019, at 13:31, İlyas Derse <ilyasderse@gmail.com> wrote:sp_getapplock