我尝试从 sys_refcursor 获取 bulkcollect 记录并尝试使用 forall 插入另一个 table 但它抛出一条错误消息

Question

--我的第一个手术

CREATE OR REPLACE PROCEDURE P1(V_SALARY NUMBER,OUTPUT_VALUE OUT SYS_REFCURSOR)
AS
BEGIN
  OPEN OUTPUT_VALUE FOR 
  SELECT FIRST_NAME,LAST_NAME
    FROM EMPLOYEES
   WHERE SALARY >V_SALARY;
END;

--第二道工序

CREATE OR REPLACE PROCEDURE P2(V_SAL NUMBER)
AS
RETURN_VALUE SYS_REFCURSOR;
  TYPE TTT IS RECORD(FIRST_NAME VARCHAR2(30),LAST_NAME VARCHAR2(20)) ;
  I TTT;
  TYPE TNAME IS TABLE OF TTT INDEX BY BINARY_INTEGER;
  K TNAME;
BEGIN
  P1(V_SAL,RETURN_VALUE);
  FETCH RETURN_VALUE BULK COLLECT INTO K;
  FORALL X IN K.FIRST..K.LAST 
    INSERT INTO T1 VALUES (K(X).FIRST_NAME,K(X).LAST_NAME);
  CLOSE RETURN_VALUE;
END;
/

ERROR at line 12: PLS-00436: implementation restriction: cannot reference fields of BULK In-BIND table of records

但是如果我尝试插入 for 循环那么它工作正常..当我使用 Forall（批量绑定）时它不工作

Answer 1

当您尝试在从另一个过程返回 collection 或 sys_refcursor 时进行批量绑定时，这看起来像是一些错误或限制。但是，您还有许多其他选项，而不是批量绑定（使用 FORALL 循环），它们同样具有高性能。

备选方案如下：

Table准备：

Create table employees (
  first_name   varchar2(100),
  last_name    varchar2(100),
  salary       number
);

Insert into employees values('A','B',1000);
Insert into employees values('C','D',2000);
Insert into employees values('E','F',3000);


Create table t1 (
  first_name   varchar2(100),
  last_name    varchar2(100)  
);

--Using Objects in place of records and sys_refcursor.
Create or replace type return_value is Object (
  first_name   varchar2(100),
  last_name    varchar2(100)  
);

Create or replace  type v_ret_val is table of return_value;

选项 1：将 P1 声明为 Function，然后使用集合作为直接路径插入。

CREATE OR REPLACE function p1 (v_salary NUMBER)      
 return v_ret_val
  AS
  abc v_ret_val;
BEGIN
  SELECT return_value(first_name,last_name) 
  Bulk collect into
    abc
  FROM employees
  WHERE salary > v_salary;

 Return abc;
END;
---------------    
CREATE OR REPLACE PROCEDURE p2 (
      v_sal NUMBER
    ) AS
      k   v_ret_val;
    BEGIN     

      k:=p1(v_sal);

      --Displaying values of collection
      For i in 1..k.count
      Loop
        dbms_output.put_line(k(i).first_name || k(i).last_name);
      End Loop;

      --Direct path insert
      INSERT /*+Append*/ INTO t1
      Select t.first_name,t.last_name
      from (table( k )) t;
      COMMIT;
    END;

选项 2：使用 OUT 参数将 P1 声明为 procedure，然后使用集合作为直接路径插入。

CREATE OR REPLACE procedure p11 (
  v_salary NUMBER
  ,output_value OUT v_ret_val
) 
AS  
BEGIN
  SELECT return_value(first_name,last_name) 
  Bulk collect into
    output_value
  FROM employees
  WHERE salary > v_salary;

END;
------------------------------

CREATE OR REPLACE PROCEDURE p2 ( v_sal NUMBER) 
AS
  k   v_ret_val;
BEGIN
  p11(v_sal,k);     

  For i in 1..k.count
  Loop
    dbms_output.put_line(k(i).first_name || k(i).last_name);
  End Loop;

  INSERT /*+Append*/ INTO t1
  Select t.first_name,t.last_name
  from (table( k )) t;

END;

选项 3：使用 OUT 参数将 P1 声明为 procedure，然后 Merging 目标集合 Table.

CREATE OR REPLACE PROCEDURE p2 (
  v_sal NUMBER
) AS
  k   v_ret_val;
BEGIN
  p11(v_sal,k);     

  For i in 1..k.count
  Loop
    dbms_output.put_line(k(i).first_name || k(i).last_name);
  End Loop;  

MERGE INTO t1 tgt 
  Using ( Select t.first_name,
                                   t.last_name
                            from table ( k ) t
                          ) src
  on (
    tgt.first_name = src.first_name 
    and tgt.last_name = src.first_name
    )
  When not matched 
  then 
   insert (
           tgt.first_name,
           tgt.last_name
         ) 
   values (
            src.first_name,
            src.last_name
          );     
END;

执行：

 Exec P2(1000);

输出：

SQL> Select * from t1;

    FIRST_NAME                         LAST_NAME
    -------------------------------------------
    E                                     F
    C                                     D

我尝试从 sys_refcursor 获取 bulkcollect 记录并尝试使用 forall 插入另一个 table 但它抛出一条错误消息

I tried to fetch bulkcollect records from sys_refcursor and tried to insert another table using forall but it throw an error message

oracle

plsql

oracle10g

plsql-package