ORA-06504: PL/SQL: 结果集变量或查询的返回类型不匹配答案

【问题标题】：ORA-06504: PL/SQL: Return types of Result Set variables or query do not matchORA-06504: PL/SQL: 结果集变量或查询的返回类型不匹配
【发布时间】：2020-09-14 02:52:05
【问题描述】：

我正在尝试使用 Oracle PL/SQL 存储过程在服务器端实现分页。

create or replace PROCEDURE SEARCH_CUST_RECIPIENTS(v_cust_id IN t_recipient.r_cust_id%TYPE,
                                                   v_recipient_id IN t_recipient.recipient_id%TYPE,
                                                   v_current_page IN NUMBER,
                                                   v_records_per_page IN NUMBER,
                                                   v_result_set OUT SYS_REFCURSOR,
                                                   v_total_records_found OUT NUMBER,
                                                   v_total_pages_no OUT NUMBER)
AS
TYPE lv_result_set_row_type IS RECORD (lrecipient_id t_recipient.recipient_id%TYPE,
                    lr_cust_id t_recipient.r_cust_id%TYPE,
                    lrecipient_name t_recipient.recipient_name%TYPE,
                    lrecipient_country t_recipient.recipient_country%TYPE,
                    lrecipient_state t_recipient.recipient_state%TYPE,
                    lrecipient_pincode t_recipient.recipient_pincode%TYPE,
                    lr_acc_number t_recipient.r_acc_number%TYPE,
                    lr_bank_name t_recipient.r_bank_name%TYPE);
lv_result_set_row lv_result_set_row_type;   
BEGIN
    OPEN v_result_set FOR
    SELECT * FROM
    (
        SELECT t_temp_table.*, ROWNUM rnum
            FROM        
            (
             SELECT t_recipient.recipient_id,
                    t_recipient.r_cust_id,
                    t_recipient.recipient_name,
                    t_recipient.recipient_country,
                    t_recipient.recipient_state,
                    t_recipient.recipient_pincode,
                    t_recipient.r_acc_number,
                    t_recipient.r_bank_name
             FROM t_recipient 
             WHERE r_cust_id=v_cust_id AND recipient_id LIKE v_recipient_id||'%' ORDER BY t_recipient.recipient_id
             ) t_temp_table
     WHERE ROWNUM <= (v_current_page)*v_records_per_page
     )
     WHERE rnum > (v_current_page-1)*v_records_per_page;

       IF v_result_set%ISOPEN THEN
        LOOP 
            FETCH v_result_set INTO lv_result_set_row;
                v_total_records_found := v_result_set%ROWCOUNT;
                v_total_pages_no := ROUND(v_total_records_found/v_records_per_page);
        END LOOP;
      END IF;
END;

我无法弄清楚结果集的返回类型和定义的记录类型有什么问题，但是当我尝试将游标 v_result_set 提取到 lv_result_set_row 时，它给了我以下错误。

Connecting to the database ORACLR_CONNECTION_DATA_CMS.

ORA-06504: PL/SQL: Return types of Result Set variables or query do not match

ORA-06512: at "C##SCOTT.SEARCH_CUST_RECIPIENTS", line 42

ORA-06512: at line 15

Process exited.

【问题讨论】：

标签： oracle stored-procedures plsql pagination resultset

【解决方案1】：

除非我错了，否则这个声明是不正确的：

TYPE lv_result_set_row_type IS RECORD

为什么？因为你正在这样做：

FETCH v_result_set INTO lv_result_set_row;

而v_result_set 包含以下内容：

t_temp_table.*, ROWNUM rnum
                ^^^^^^^

并且lv_result_set_row_type 不包含任何可以接受rnum 值的内容。

因此，如果您将其修改为例如

TYPE lv_result_set_row_type IS RECORD (lrecipient_id t_recipient.recipient_id%TYPE,
                    lr_cust_id t_recipient.r_cust_id%TYPE,
                    lrecipient_name t_recipient.recipient_name%TYPE,
                    lrecipient_country t_recipient.recipient_country%TYPE,
                    lrecipient_state t_recipient.recipient_state%TYPE,
                    lrecipient_pincode t_recipient.recipient_pincode%TYPE,
                    lr_acc_number t_recipient.r_acc_number%TYPE,
                    lr_bank_name t_recipient.r_bank_name%TYPE,
                    rnum number                                         --> add this
                   );

应该没问题。

但不会太久！一些反对意见：

你永远不会退出循环；添加EXIT WHEN v_result_set%NOTFOUND;
v_total_records_found 总是，对于每个循环迭代，包含 v_result_set 中的行数。这不是“错误”，而是 - 它的目的是什么？

【讨论】：