[Freeswitch-users] dbh:query - insert id

Sun May 26 14:46:39 MSD 2013

If you switch from luasql to freeswitch.Dbh then the freeswitch.Dbh object
will give a single connection until you either call the release method or
the variable goes out of scope. That means queries will happen on the same
transaction.

-Steve

On 25 May 2013 19:30, William King <william.king at quentustech.com> wrote:

> Unfortunately you may hit a problem with last_insert_id() because FS
> uses connection pooling, and statement batches(at least for some select
> statements). Someone could check the lua wrapper code to see how the dbh
> handler code is implemented.
>
> William King
> Senior Engineer
> Quentus Technologies, INC
> 1037 NE 65th St Suite 273
> Seattle, WA 98115
> Main:   (877) 211-9337
> Office: (206) 388-4772
> Cell:   (253) 686-5518
> william.king at quentustech.com
>
> On 05/25/2013 10:11 AM, François wrote:
> > 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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