用于循环的光标以在 oracle 存储过程中以正确的格式返回输出

Question

我有以下过程，我想返回变量值brand_name.BRAND_NAME 的输出。我得到了正确的输出。但我想以正确的格式返回它。例如，现在我得到的输出为

BRAND_NAMES:FNC
BRAND_NAMES:LIDL

但我想将输出返回为：

BRAND_NAME: FNC,LIDL

这是我的存储过程：

FUNCTION BUILD_ALERT_EMAIL_BODY
(
  IN_ALERT_LOGS_TIMESTAMP IN TIMESTAMP
, IN_ALERT_LOGS_LOG_DESC IN VARCHAR2
, IN_KPI_LOG_ID IN NUMBER
) RETURN VARCHAR2 AS
BODY VARCHAR2(4000) := '';
V_KPI_DEF_ID NUMBER := '';
V_BRAND_NAME VARCHAR2(100) := '';
V_KPI_TYPE_ID NUMBER := '';

CURSOR brand_names_cur 
IS
Select BR.NAME AS BRAND_NAME INTO V_BRAND_NAME FROM RATOR_MONITORING_CONFIGURATION.KPI_DEFINITION KD JOIN RATOR_MONITORING_CONFIGURATION.KPI_DEFINITION_BRAND KDB ON KD.KPI_DEF_ID = KDB.KPI_DEF_ID JOIN
RATOR_MONITORING_CONFIGURATION.BRAND BR ON KDB.BRAND_ID = BR.BRAND_ID WHERE KD.KPI_DEF_ID = V_KPI_DEF_ID;

BEGIN
Select KPI_DEF_ID INTO V_KPI_DEF_ID FROM KPI_LOGS WHERE KPI_LOG_ID = IN_KPI_LOG_ID;

Select KT.KPI_TYPE_ID INTO V_KPI_TYPE_ID FROM RATOR_MONITORING_CONFIGURATION.KPI_DEFINITION KD JOIN RATOR_MONITORING_CONFIGURATION.KPI_TYPE KT ON KD.KPI_TYPE = KT.KPI_TYPE_ID WHERE KD.KPI_DEF_ID = V_KPI_DEF_ID;

    FOR brand_name IN brand_names_cur
    LOOP
    BODY := BODY || 'BRAND_NAME:' || brand_name.BRAND_NAME || Chr(10) || Chr(13);
    END LOOP;   

BODY := BODY || 'ALERT_DESCRIPTION:' || to_char(IN_ALERT_LOGS_LOG_DESC);

    RETURN BODY;
END BUILD_ALERT_EMAIL_BODY;

Answer 1

添加 V_FIRST_RECORD 变量

V_FIRST_RECORD Boolean := true;

并像这样在循环中使用它

if v_first_record then
  body := 'BRAND_NAME: '||brane_name.BRAND_NAME;
else
  body := body ||','||brane_name.BRAND_NAME;
  v_first_record := false;
end if;