Using Cursor attributes in Pro*C application (.pc file)

Question

hi,
Does anyone know, what is hte equivalent of following PLSQL code in PRO*C??
declare
cursor c1 as select * from emp;
begin
if c1%isopen then
close c1;
else
open c1;
end;
I m able to get the cursor working succefully as such. But before my procedure opens it, i want to check whether it has been left open by the loop or whatever...
So what is the equivalent of "if c1%isopen....." in Pro*C??
I am able to get hte paramterized cursor workign as given in the book - Guide to ORacle Precompilers . But that does not mention anything about Cursor attributes usage in the Pro*C code.
Pls help...
thanks
regards
Abhivyakti

Answer 1

Hi Leonid, Andrea
When you use "CONNECT AT :db_handle" instead of default connection "CONNECT", you have to give the connect handle to the command you want to execute.
ie:
EXEC SQL AT :db_handle PREPARE SQL_stat FROM "select ...";
EXEC SQL AT :db_handle DECLARE cur_stat CURSOR for SQL_stat;
EXEC SQL AT :db_handle OPEN cur_stat ;
EXEC SQL AT :db_handle FETCH cur_stat INTO :resrec;
Leonid, the error you had is probably because you connected at "DB_VE", and tried to select from default connect (that you're not connected to ==> ORA-01012)
Try EXEC SQL AT :DB_VE FETCH :c1 INTO :resrec;
or, if you connect to only 1 database, use "EXEC SQL CONNECT;" instead of (EXEC SQL CONNECT :pConnectString AT "DB_VE";) so that you use default connect name and you don't have to add "AT :DB_VE" to your SQL commands.
I know this reply comes long after your request, but I hope it may still help anybody.