Re: Inserting with a column that uses auto_increment

Thanks Jim,

So if I have a table with 3 columns and the first column is the  
auto_increment column.
I can do this and it will work?

// Used for inserts
sql_create_2(insert, 1,2, int, some_id_2, int, some_id_3)

// Used for retrievals
sql_create_3(query, 1,2, int, auto_id_1, int, some_id_2, int, some_id_3)

Thanks again,
Graham

On Aug 11, 2007, at 8:29 PM, Jim Wallace wrote:

> I use auto_increment often.  The trick is to not include that  
> column in
> the sql_create_* macro.  This may mean you have > 1 macro for the same
> table, one for insert w/o that column, and one for retrieval with that
> column.  I often have > 1 macro for the same table depending on how  
> I'm
> using it.
>
> HTH
>
> -----Original Message-----
> From: Graham Reitz [mailto:grahamreitz@xxxxxxx]
> Sent: Saturday, August 11, 2007 2:27 AM
> To: plusplus@xxxxxxxxxxxxxxx
> Subject: Inserting with a column that uses auto_increment
>
> How do you prevent an insert as shown in the code below from putting
> "bogus" data in an auto_increment field?
>
> It seems like the billing_id field, in the code below, inserts a  
> number
> based on the un-initialized value of client_id, instead of letting the
> database auto_increment the value.  What's a good method to deal with
> this, that allows the database to auto_increment a database field?
>
> Thanks,
> Graham
>
> /************ CODE ************/
>
> #include <mysql++.h>
> #include <custom.h>
>
> using namespace mysqlpp;
>
> sql_create_2(clients, 1, 2,
>               unsigned int,     client_id, // auto_incremented field
>               unsigned int,     billing_id)
>
> void populate_client_info(clients& client_info)
> {
>      client_info.billing_id = 1;
> }
>
> int main (int argc, char* const argv[])
> {
>      Connection connection("db_name","ip_address","user",
>                            "password",3306, false);
>
>      Query client_query = connection.query();
>
>      clients a_client;
>      populate_client_info(a_client);
>
>      client_query.insert(a_client);
>      client_query.execute();
>
>      return 0;
> }
>
>
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