Обсуждение: Commit not required for update statement
Hi all
We are running posters 10.4 version, wanted to know if commit statement is not required for update.
Autocommit is, by default, off for embedded SQL programs in PostgreSQL 10. The syntax to change that is: SET AUTOCOMMIT TO ON Cheers, - Evan Evan Bauer eb@evanbauer.com +1 646 641 2973 Skype: evanbauer > On Oct 14, 2018, at 22:30, prasanna rk <prasanna2mail@gmail.com> wrote: > > Hi all > > We are running posters 10.4 version, wanted to know if commit statement is not required for update.
Hi, Definitely worth reading what the docs say about this, should clear things up: https://www.postgresql.org/docs/current/static/tutorial-transactions.html regards Mark On 15/10/18 15:30, prasanna rk wrote: > Hi all > > We are running posters 10.4 version, wanted to know if commit > statement is not required for update.
Hi Mark
Thank you for sharing, as per the link
"PostgreSQL actually treats every SQL statement as being executed within a transaction. If you do not issue a
BEGINcommand, then each individual statement has an implicit BEGIN and (if successful) COMMIT wrapped around it. A group of statements surrounded by BEGIN and COMMIT is sometimes called a transaction block."Note
Some client libraries issue BEGINand COMMIT commands automatically, so that you might get the effect of transaction blocks without asking. Check the documentation for the interface you are using.
Does this mean..every statement which does not have begin will be automatically commited.
On Mon, 15 Oct 2018, 09:20 Mark Kirkwood, <mark.kirkwood@catalyst.net.nz> wrote:
Hi,
Definitely worth reading what the docs say about this, should clear
things up:
https://www.postgresql.org/docs/current/static/tutorial-transactions.html
regards
Mark
On 15/10/18 15:30, prasanna rk wrote:
> Hi all
>
> We are running posters 10.4 version, wanted to know if commit
> statement is not required for update.
On Sunday, October 14, 2018, prasanna rk <prasanna2mail@gmail.com> wrote:
Does this mean..every statement which does not have begin will be automatically commited.
You should experiment in your chosen environment and see what does and doesn’t work.
David J.
Yeah - it matters whether you using psql client or python db api (for example) - as some of these decide to open a transaction immediately after a connection is established (via BEGIN) . So reading the docs and experimenting as indicated is essential! regards Mark On 15/10/18 18:58, David G. Johnston wrote: > On Sunday, October 14, 2018, prasanna rk <prasanna2mail@gmail.com > <mailto:prasanna2mail@gmail.com>> wrote: > > Does this mean..every statement which does not have begin will be > automatically commited. > > > You should experiment in your chosen environment and see what does and > doesn’t work. > > David J. >