Thread: libpq - getting value of SERIAL field when INSERT-ing?
Using libpq, how do I get the return value from an INSERT statement?
CREATE TABLE foo ( pk SERIAL , val text, PRIMARY KEY (pk) );
INSERT INTO foo VALUES ( DEFAULT, 'stuff' ) RETURNING (pk);
How do I get the value assigned to 'pk'? I assume it's in the 'PGresult' returned from 'PQexec()', but I can't find anything in the documentation for 'PGresult' that appears to discuss this particular use.
Regards,
- Roy
=*=*=
Always do right.
This will gratify some people and astonish the rest. - Mark Twain
The truth is rarely pure, and never simple. - Oscar Wilde
CREATE TABLE foo ( pk SERIAL , val text, PRIMARY KEY (pk) );
INSERT INTO foo VALUES ( DEFAULT, 'stuff' ) RETURNING (pk);
How do I get the value assigned to 'pk'? I assume it's in the 'PGresult' returned from 'PQexec()', but I can't find anything in the documentation for 'PGresult' that appears to discuss this particular use.
Regards,
- Roy
=*=*=
Always do right.
This will gratify some people and astonish the rest. - Mark Twain
The truth is rarely pure, and never simple. - Oscar Wilde
"Roy's Email" <rmw256@hotmail.com> writes:
> Using libpq, how do I get the return value from an INSERT statement?
> CREATE TABLE foo ( pk SERIAL , val text, PRIMARY KEY (pk) );
> INSERT INTO foo VALUES ( DEFAULT, 'stuff' ) RETURNING (pk);
> How do I get the value assigned to 'pk'? I assume it's in the 'PGresult' returned from 'PQexec()', but I can't find
anythingin the documentation for 'PGresult' that appears to discuss this particular use.
The PGresult is exactly the same as if you'd done "SELECT pk FROM ..."
regards, tom lane