Question

我正在编写脚本并在将行值保存到变量时出错我正在尝试更新我需要从其他相应表中获取的表

DECLARE
cur SYS_REFCURSOR;
dept_row department%rowtype;
employee_row employee%rowtype;
status number :=0;
BEGIN

FOR employee_details IN (select * from employee_details_table)
LOOP
select * into dept_row from department dept where employee_details.dept_id = dept.dept_id;
select * into employee_row from employee emp where emp.dept_id = empoyee_details.dept_id;

IF employee_details.valid <> employee_row.valid THEN
 // call SP which uses values from both dept_row & employee_row
END IF;
END LOOP;
COMMIT;
END;
/

当我运行上面的SQL时，我收到错误。 ORA-01722 ORA-06512

我无法弄清楚上面的代码有什么问题。请帮忙

由于

Answer 1

您错误地使用了collection。另外，最好避免loop使用for并使用bulk collect和forall statement来最小化context switch之间sql and plsql engines的开销。

DECLARE
  TYPE t_bulk_collect_test_tab IS TABLE OF employee_table%ROWTYPE;

  l_tab t_bulk_collect_test_tab;

  CURSOR c_data IS
    SELECT *
    FROM employee_table;
BEGIN
  OPEN c_data;
  LOOP
    FETCH c_data
    BULK COLLECT INTO l_tab LIMIT 10000;
    EXIT WHEN l_tab.count = 0;

.......

End;

有关集合，批量收集和forall语句的更多示例，请参阅此处的示例http://oracle-base.com/articles/9i/bulk-binds-and-record-processing-9i.php

请记住，最好避免loops。 Row by row为slow by slow。

PL / SQL将行存储到变量中并在for循环中使用它们

1 个答案: