Oracle 存储函数未将结果作为 sql 字符串返回

Question

我有以下 Oracle 存储过程，它运行良好并返回条件 IF (V_KPI_TYPE_ID = 13) 的结果。但是当我使用条件IF ((V_KPI_TYPE_ID = 12) OR (V_KPI_TYPE_ID = 18)) 然后它没有返回任何结果。我尝试调试我的代码并尝试运行选择查询，我将结果放入变量V_SYSTEM_SQL_CHECK 并返回值并且选择查询工作正常.此变量中的返回值将是 sql 字符串。我正在使用 varchar2 数据类型来存储这个 sql 字符串。所以我认为我使用的数据类型是将 sql 字符串存储到变量中是不正确的，但不确定

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_SYSTEM_SQL_CHECK VARCHAR2(3000) := '';
V_SOAP_SERVICE_NAME VARCHAR2(100) := '';

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;

DBMS_OUTPUT.PUT_LINE('KPI_TYPE_ID:' || V_KPI_TYPE_ID);

Select KT.CHECK_SQL INTO V_SYSTEM_SQL_CHECK FROM RATOR_MONITORING_CONFIGURATION.KPI_DEFINITION KD JOIN RATOR_MONITORING_CONFIGURATION.SYSTEM_SQL_CHECK KT ON KD.SYSTEM_SQL_CHECK_ID = KT.SYSTEM_SQL_CHECK_ID WHERE KD.KPI_DEF_ID = V_KPI_DEF_ID;

DBMS_OUTPUT.PUT_LINE('SYSTEM_SQL_CHECK' || V_SYSTEM_SQL_CHECK);

Select SP.SOAP_SERVICE_NAME INTO V_SOAP_SERVICE_NAME FROM RATOR_MONITORING_CONFIGURATION.KPI_DEFINITION KD JOIN RATOR_MONITORING_CONFIGURATION.SOAP_SERVICE SP ON KD.SOAP_SERVICE_ID = SP.SOAP_SERVICE_ID WHERE KD.KPI_DEF_ID = V_KPI_DEF_ID;

    BODY := to_char(IN_ALERT_LOGS_TIMESTAMP,'DD.MM.YYYY HH24:MI') || Chr(13) || Chr(10);       

IF ((V_KPI_TYPE_ID = 12) OR (V_KPI_TYPE_ID = 18)) THEN
    BODY := BODY || 'SQL USED:' || V_SYSTEM_SQL_CHECK || Chr(13) || Chr(10);
  ELSE IF (V_KPI_TYPE_ID = 13) THEN 
    BODY := BODY || 'SOAP_SERVICE:' || Chr(13) || Chr(10);
    BODY := BODY || V_SOAP_SERVICE_NAME || Chr(13) || Chr(10);        
  END IF;
END IF;

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

    RETURN BODY;
END BUILD_ALERT_EMAIL_BODY;

当我调试我的代码时，它会返回如下正确的结果：

KPI_TYPE_ID:18
SYSTEM_SQL_CHECK:select CASE WHEN (o.cnt = 0) THEN 0 ELSE round((r.cnt / o.cnt)*100,3) END from (select count(*) as cnt from rate_errors where id > to_char(SYSTIMESTAMP - INTERVAL '1' HOUR, 'YYYYMMDDHH24MISS') ||'0000' ) r cross join
     (select count(*) as cnt
      from SDR_O2
      where id > to_char(SYSTIMESTAMP - INTERVAL '1' HOUR, 'YYYYMMDDHH24MISS')||'0000'
    ) o

Answer 1

修改代码中的以下行

BODY := to_char(IN_ALERT_LOGS_TIMESTAMP,'DD.MM.YYYY HH24:MI') || Chr(13) || Chr(10);    

喜欢这个并尝试-

BODY := 'to_char(' || IN_ALERT_LOGS_TIMESTAMP || ',''DD.MM.YYYY HH24:MI'')' || Chr(13) || Chr(10);

同时使用 to_char 函数（即 sql）修改为 BODY 分配的任何位置。

Answer 2

只需使用

  IF (V_KPI_TYPE_ID = 12 OR V_KPI_TYPE_ID = 18) THEN

如果仍然没有返回结果，请告诉我