да легко.

#include <iostream.h>
#include <sql.h>


EXEC SQL INCLUDE SQLCA;

EXEC SQL BEGIN DECLARE SECTION;

char buf[1000]; // buffer for getline
SQL TYPE IS CLOB_LOCATOR pterodactyl;
short pterodactyl_idx;
sqlint32 brachiosaur;
short brachiosaur_idx;

EXEC SQL END DECLARE SECTION;


int main(int argc, char *argv[])
{

EXEC SQL CONNECT TO PSIDBMW;

EXEC SQL DECLARE C1 CURSOR FOR SELECT
INT, CLOB FROM CLOB WHERE INT = 5 FOR UPDATE;

EXEC SQL OPEN C1;
if(SQLCODE) {
cerr << "Cursor Open Filed with SQLCODE " << SQLCODE << endl << flush;
return 1;
}

// Fetch one row
EXEC SQL FETCH C1 INTO :brachiosaur :brachiosaur_idx,
:pterodactyl :pterodactyl_idx;
if(SQLCODE) {
// no rows found, probably
cerr << "Fetch Failed with SQLCODE " << SQLCODE << endl << flush;
return 1;
}
// test for null;
if(pterodactyl_idx < 0) {
// returns null clob value;
cerr << "I am so young for working with NULL clobs\n" << flush;
return 1;
}
for(;;) {
cout << "Get me srting, pleace ... \n" << flush;
cin >> buf;
if(cin.eof()) break;

EXEC SQL VALUES (:pterodactyl || :buf) INTO :pterodactyl;
if(SQLCODE) {
cerr << "Values Failed with SQLCODE " << SQLCODE << endl << flush;
return 1;
}

EXEC SQL UPDATE CLOB SET CLOB = :pterodactyl WHERE CURRENT OF C1;
if(SQLCODE) {
cerr << "Update Failed with SQLCODE " << SQLCODE << endl << flush;
return 1;
}
}
// Commit the changes
EXEC SQL COMMIT;
return 0;
}