之前上传的图片会消失，将图片插入Oracle表中

Question

我有一个存储过程，我在其中插入或上传一些行。插入时，如果第二次插入同一行，则较早的行将与其他行一起删除。我想在插入新行时保留这些行。

这是查询：

IF TBL_INSERT > 0 THEN
BEGIN
    SELECT COUNT(*) INTO V_PANAROMICIMG_COUNT 
    FROM TBL_VSAT_IMAGE_DETAIL 
    WHERE IMG_TYPE = 'Panaromic' AND IMG_ID = TBL_INSERT;
       
    IF V_PANAROMICIMG_COUNT > 0 THEN
    BEGIN        
        DELETE FROM TBL_VSAT_IMAGE_DETAIL 
        WHERE IMG_TYPE = 'Panaromic' AND IMG_ID = TBL_INSERT;  
    END;        
END IF;  
       
IF P_PANORAMIC_IMAGES IS NOT NULL THEN
BEGIN
    FOR PMULTIFIELDS IN (SELECT REGEXP_SUBSTR(P_PANORAMIC_IMAGES,'[^,]+', 1, LEVEL) AS IMAGES FROM DUAL
                                      CONNECT BY REGEXP_SUBSTR(P_PANORAMIC_IMAGES, '[^,]+', 1, LEVEL) IS NOT NULL
                                    )
    LOOP
        INSERT INTO TBL_VSAT_IMAGE_DETAIL (IMG_ID, IMG_NAME, IMG_TYPE, IMG_UPLOADED_DATE, UPLOADED_BY)
        VALUES (TBL_INSERT, PMULTIFIELDS.IMAGES, 'Panaromic', SYSDATE, P_CREATED_BY);
    END LOOP;
END;
       
END IF;

更新

Table desc: TBL_VSAT_IMAGE_DETAIL

Name              Null?    Type            
----------------- -------- --------------- 
IMG_ID            NOT NULL NUMBER          
IMG_NAME                   NVARCHAR2(2000) 
IMG_TYPE                   NVARCHAR2(100)  
IMG_UPLOADED_DATE          DATE            
UPLOADED_BY                NVARCHAR2(100)  
ID                NOT NULL NUMBER  

示例图像名称为

90.jpg

、

120.jpg

。因此，如果表由图像名称和

90.jpg

组成，那么它应该更新图像名称或删除并插入具有相同图像名称的新图像

Answer 1

ID

语句来指定

MERGE

或

INSERT

：UPDATE

注意：您可能不想事先

IF P_PANORAMIC_IMAGES IS NOT NULL THEN
  MERGE INTO TBL_VSAT_IMAGE_DETAIL dst
  USING (
    SELECT REGEXP_SUBSTR(P_PANORAMIC_IMAGES,'[^,]+', 1, LEVEL) AS image_name
    FROM   DUAL
    CONNECT BY REGEXP_SUBSTR(P_PANORAMIC_IMAGES, '[^,]+', 1, LEVEL) IS NOT NULL
  ) src
  ON (   dst.img_id = TBL_INSERT
     AND dst.image_name = src.image_name )
  WHEN MATCHED THEN
     UPDATE
     SET img_type          = 'Panoramic',
         img_uploaded_date = SYSDATE,
         uploaded_by       = P_CREATED_BY
  WHEN NOT MATCHED THEN
    INSERT INTO (IMG_ID, IMG_NAME, IMG_TYPE, IMG_UPLOADED_DATE, UPLOADED_BY)
    VALUES (TBL_INSERT, src.image_name, 'Panaromic', SYSDATE, P_CREATED_BY);
END IF;

，因此请尝试删除第一个

DELETE

语句 - 但是您的业务逻辑尚未完全解释，因此您这样做可能是有原因的。