函数支持自治事务

自治事务可以在函数中定义，标识符为PRAGMA AUTONOMOUS_TRANSACTION，其余语法与函数语法相同，示例如下。

1. create table t4(a int, b int, c text);

3. CREATE OR REPLACE function autonomous_32(a int ,b int ,c text) RETURN int AS
4. DECLARE
5. PRAGMA AUTONOMOUS_TRANSACTION;
6. BEGIN
7. insert into t4 values(a, b, c);
8. return 1;
9. END;
10. /
11. CREATE OR REPLACE function autonomous_33(num1 int) RETURN int AS
12. DECLARE
13. num3 int := 220;
14. tmp int;
15. PRAGMA AUTONOMOUS_TRANSACTION;
16. BEGIN
17. num3 := num3/num1;
18. return num3;
19. EXCEPTION
20. WHEN division_by_zero THEN
21. select autonomous_32(num3, num1, sqlerrm) into tmp;
22. return 0;
23. END;
24. /

26. select autonomous_33(0);

28. select * from t4;