declarer_emp scott.emp%rowtype;cursorcur_empisselectt.*fromscott.emp t;beginopencur_emp; loopfetchcur_empintor_emp;exitwhencur_emp%notfound; dbms_output.put_line(r_emp.empno||''||r_emp.sal);endloop;closecur_emp;end;
Oracle Database need not verify thata cursor is in the cache because it cannot be deallocated while an applicationcursor associated with it is open.
Oracle Database need not verify thata cursor is in the cache because it cannot be deallocated while an applicationcursor associated with it is open.
Example2:检验游标是否打开,如果打开显示提取行数 DECLARE CURSOR emp_cursor IS SELECT empno,ename,job FROM emp; v_empno emp.empno%TYPE; v_name emp.ename%TYPE; v_job emp.job%TYPE; BEGIN OPEN emp_cursor; LOOP FETCH emp_cursor INTO v_empno,v_name,v_job; EXIT WHEN emp_cursor%NOTFOUND; E...
Example of CLOSE a cursor Close a PL/pgSQL cursor using theCLOSEcommand. DO $$ DECLARE c3 CURSOR FOR SELECT id, name FROM employees; emp_id integer; emp_name varchar; BEGIN OPEN c3; FETCH LAST FROM c3 INTO emp_id, emp_name; CLOSE c3; END$$; ...
(Fetching from a cursor after the last row has been retrieved and the ORA-1403 error returned.) 2)如果游标已经被FOR UPDATE 字句打开,发出COMMIT以后fetch将会返回错误。 (If the cursor has been opened with the FOR UPDATE clause, fetching after a COMMIT has been issued will return the error.)...
then process it using the PREPARE command with the DECLARE, OPEN, FETCH, and CLOSE cursor commands. The number of select-list items, the number of place-holders for input host variables, and the datatypes of the input host variables must be known at precompile time. For example, the follow...
Simply increasing the "OPEN_CURSORS" limit can help you avoid the problem for a while, but that just hides the problem, not solve it. It is your responsibility to explicitly close out cursors that you no longer need. Error Message: "ORA-01002: fetch out of sequence" A JDBC Connection ...
drivers. Those operations are not enclosed indoPriviligedblocks. One noteworthy example is that the calling code needs the open socket permission when using the thin driver to open a connection. This is to prevent rogue code from using the drivers for a denial of service attack, among other ...
LOOPFETCH c1 INTO my_record;EXIT WHEN c1%NOTFOUND;-- process data recordEND LOOP; The query can reference PL/SQL variables within its scope. However, any variables in the query are evaluated only when the cursor is opened. In the following example, each retrieved salary is multiplied by2,...