[Freeswitch-users] dbh:query - insert id

[François]

Thanks to Steven and William for mentioning the RETURNING clause. I
checked it out and learned something cool about PostgreSQL, so to me
there's no problem with one liners like that.

About MySQL's last_insert_id(), it is fine to use because it returns the
last id for that particular connection/dbh handler, so you shouldn't
need to worry about race as long as you use it with the same handler
right after your insert.

For other DB where race could be an issue (ex: sqlite3), you could
always wrap it in a transaction to be sure:

begin transaction;
insert <stuff>;
select last_insert_id();
end transaction;

François.

On Sat, 2013-05-25 at 04:01 -0400, John M wrote:
> Hi Daniel,
> 
> Thanks for your description, it is much appreciated. :-)
> 
> 5 word one liners from people too lazy to explain properly would
> really be best if they didn't reply at all.
> 
> Cheers, thanks again.
> 
> -Jm
> 
> 
> 
> 
> 
> 
> -----Original Message-----
> From: Daniel Ivanov <sertys at gmail.com>
> To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> Sent: Sat, May 25, 2013 5:57 pm
> Subject: Re: [Freeswitch-users] dbh:query - insert id
> 
> It is true that the luasql driver is overly basic and poorly
> documented . Unfortunately mysql doesn't support RETURNING clause like
> pgsql and oracle. You should however try SELECT LAST_INSERT_ID();
> right after the insert query. I cannot guarantee it works due to the
> unknown nature(to me that is) of the luasql transaction handling, but
> it should keep a transaction open for as long as a db handler lives.
> 
> On May 25, 2013 7:03 AM, "John M" <j_mj at aol.com> wrote:
>         Hi Seven Du,
>         
>         I'd really like to know if this is possible too, couldn't find
>         it documented anywhere.
>         
>         Instead of being cryptic, if you know the answer won't you
>         please help by explaining what the RETURNING clause is and how
>         to use it?
>         
>         Does it somehow return mysql_insert_id()?
>         
>         How should we use it.
>         
>         You help is invaluable and is contributing to the freeswitch
>         community.
>         
>         -Jm
>         
>         
>         
>         
>         
>         -----Original Message-----
>         From: Seven Du <dujinfang at gmail.com>
>         To: FreeSWITCH Users Help
>         <freeswitch-users at lists.freeswitch.org>
>         Sent: Sat, May 25, 2013 12:52 pm
>         Subject: Re: [Freeswitch-users] dbh:query - insert id
>         
>         Maybe try the RETURNING clause ? 
>         
>         
>         -- 
>         Seven Du
>         http://www.freeswitch.org.cn
>         http://about.me/dujinfang
>         http://www.dujinfang.com
>         
>         
>         Sent with Sparrow
>         
>         
>         On Saturday, May 25, 2013 at 8:14 AM, Lloyd Aloysius wrote:
>         > Hello All
>         > 
>         > 
>         > How to get the id value after insert a record a record using
>         > dbh:query
>         > 
>         > 
>         > table_a - columns.
>         > 
>         > 
>         > id - auto increment
>         > field1
>         > field2
>         > 
>         > 
>         > 
>         > 
>         > dbh:query("insert into table_a ( field1,field2) values
>         > ('11','Test')")
>         > 
>         > 
>         > 
>         > 
>         > After insert how to get the table_a - id value for the
>         > inserted record?
>         > 
>         > 
>         > Thanks
>         > Lloyd
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