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Help me

Hi to all NG

I have a problem with my c program. I try to manage a cursor, but I can't
able to do.
my problem is this :
suppose to have a table t1, describe with a columns c1, c2 .. cn Now:
.....
.....
EXEC SQL DECLARE c11 CURSOR WITH HOLD FOR
select c1, c2 , c3
from t1
where c4 = 1 ;

EXEC SQL OPEN c11 ;

while ( TRUE ) {
EXEC SQL FETCH c11 INTO var1:ivar1 , var2:ivar2, var3:ivar3;
if no data found the exit ;
.....
}

DESIDERATA:
I 'ld like to write these piece of code in this way

fun_declare_open()
int main(argv, argc)
{
....
fun_declare_open() ;
....
while ( TRUE ) {
EXEC SQL FETCH c11 INTO var1:ivar1 , var2:ivar2, var3:ivar3;
if no data found the exit ;
....
}
}
fun_declare_open()
{
EXEC SQL DECLARE c11 CURSOR WITH HOLD FOR
select c1, c2 , c3
from t1
where c4 = 1 ;

EXEC SQL OPEN c11 ;
}

In the DESIDEARATA case during the precompilation the system told me that
the cursor c11 was undefined!!??!?!

Why ?

someone can help me ?
I hope yes

Best thanks and best regards
sergio
Nov 12 '05 #1
2 2822
"EAP90210" <ea******@yahoo.it> wrote in message
news:bn**********@stargate1.inet.it...
Hi to all NG

I have a problem with my c program. I try to manage a cursor, but I can't
able to do.
my problem is this :
suppose to have a table t1, describe with a columns c1, c2 .. cn Now:
....
....
EXEC SQL DECLARE c11 CURSOR WITH HOLD FOR
select c1, c2 , c3
from t1
where c4 = 1 ;

EXEC SQL OPEN c11 ;

while ( TRUE ) {
EXEC SQL FETCH c11 INTO var1:ivar1 , var2:ivar2, var3:ivar3;
if no data found the exit ;
....
}

DESIDERATA:
I 'ld like to write these piece of code in this way

fun_declare_open()
int main(argv, argc)
{
....
fun_declare_open() ;
....
while ( TRUE ) {
EXEC SQL FETCH c11 INTO var1:ivar1 , var2:ivar2, var3:ivar3;
if no data found the exit ;
....
}
}
fun_declare_open()
{
EXEC SQL DECLARE c11 CURSOR WITH HOLD FOR
select c1, c2 , c3
from t1
where c4 = 1 ;

EXEC SQL OPEN c11 ;
}

In the DESIDEARATA case during the precompilation the system told me that
the cursor c11 was undefined!!??!?!

Why ?

someone can help me ?
I hope yes

Best thanks and best regards
sergio

The Declare Cursor is not actually a separate piece of executable SQL code.
It is actually part of the Open Cursor statement and must occur before the
Open Cursor (actually anywhere in the program before the Open Cursor
statement). Also, make sure that you don't check the SQL return code of the
Declare Cursor statement, because since it is not an executable SQL
statement, you are really checking the return code of the previous SQL
statement that was executed in your program.

Most people place the Declare Cursor towards the front of the program where
variables are defined.
Nov 12 '05 #2
Best thanks for your answer!

Can you show me an address that is possible to see a "c" program that call
an sql for db2 ?

thanks again
Sergio
p.s. : I 'm a junior and I have not a sufficient experience !
[cut]
The Declare Cursor is not actually a separate piece of executable SQL

code. It is actually part of the Open Cursor statement and must occur before the
Open Cursor (actually anywhere in the program before the Open Cursor
statement). Also, make sure that you don't check the SQL return code of the Declare Cursor statement, because since it is not an executable SQL
statement, you are really checking the return code of the previous SQL
statement that was executed in your program.

Most people place the Declare Cursor towards the front of the program where variables are defined.

Nov 12 '05 #3

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