需要关于postgres代码的for循环的建议

-1

我需要编写一个postgres查询来获取beta_plan_id的集群ID，稍后再做一些操作。对于下表中的单个beta_plan_id，可能会有许多商品编号和很多CLUSTER_ID。这将如何处理？需要关于postgres代码的for循环的建议

BETA_PLAN_ID MERCH_LEVEL1_ID BETA_PLAN_MERCH_LVL1_CLSTR_ID NO_OF_STORES 
1     1     12       5,6,7 
1     1     13       9,10 
1     1     14       2,3,4 
2     2     15       13,12 

SELECT BETA_PLAN_MERCH_LVL1_CLSTR_ID INTO i_clstr_id 
FROM beta_plan.BETA_PLAN_MERCH_LVL1_CLSTR 
WHERE BETA_PLAN_ID = in_beta_plan_id;

问题是许多结果将被返回，因为BETA_PLAN_MERCH_LVL1_CLSTR_ID是串行类型和（beta_plan_id，merch_id，CLUSTER_ID）组合唯一地生成的。

SELECT BETA_PLAN_MERCH_LVL1_CLSTR_ID 
    INTO i_clstr_id 
    FROM beta_plan.BETA_PLAN_MERCH_LVL1_CLSTR 
    WHERE BETA_PLAN_ID = in_beta_plan_id; 

INSERT INTO beta_plan.BETA_PLAN_MERCH_LVL1_CLSTR 
    (
     BETA_PLAN_ID, 
     MERCH_LEVEL1_ID, 
     CLUSTER_ID, 
     CLUSTER_NAME, 
     NO_OF_STORES, 
     NO_OF_FOOTAGE_VARIATION, 
     CREATED_USER, 
     CREATED_TS 
    ) 
    SELECT 
     out_plan_id, 
     merch_lvl1_clstr.MERCH_LEVEL1_ID, 
     merch_lvl1_clstr.CLUSTER_ID, 
     merch_lvl1_clstr.CLUSTER_NAME, 
     merch_lvl1_clstr.NO_OF_STORES, 
     merch_lvl1_clstr.NO_OF_FOOTAGE_VARIATION 
     in_user_id, 
     now() 
    FROM beta_plan.BETA_PLAN_MERCH_LVL1_CLSTR merch_lvl1_clstr 
     INNER JOIN beta_plan.BETA_PLAN_MERCH_COPY_PLAN merch_copy 
     ON merch_copy.MERCH_ID = merch_lvl1_clstr.MERCH_LEVEL1_ID 
      AND merch_lvl1_clstr.BETA_PLAN_ID = in_beta_plan_id 
    RETURNING BETA_PLAN_MERCH_LVL1_CLSTR_ID INTO o_clstr_id; 

INSERT INTO beta_plan.BETA_PLAN_MERCH_LVL1_CLSTR_STR 
    (
     BETA_PLAN_MERCH_LVL1_CLSTR_ID, 
     STORE_ID, 
     CREATED_USER, 
     CREATED_TS   
    ) 
    SELECT 
     o_clstr_id, 
     STORE_ID,  
     in_user_id, 
     now() 
    FROM beta_plan.BETA_PLAN_MERCH_LVL1_CLSTR_STR 
    WHERE BETA_PLAN_MERCH_LVL1_CLSTR_ID = i_clstr_id;

来源

2017-03-06 vignesh ramanathan

您要为给定的“BETA_PLAN_ID”返回哪个“BETA_PLAN_MERCH_LVL1_CLSTR_ID”？ –

我需要行beta_plan_id 1有cluster_id的12,13,14 ..我需要在clstr_str表中插入这些id和相应的store_id的上面。所以基本上我需要一个选择语句循环通过记录并插入clstr_str表最后。 –

在PostgreSQL函数或数据库客户端的编程语言中？ –

代替第一SELECT语句，使用FOR环包围中的其他语句：

FOR i_clstr_id IN 
    SELECT BETA_PLAN_MERCH_LVL1_CLSTR_ID 
    FROM beta_plan.BETA_PLAN_MERCH_LVL1_CLSTR 
    WHERE BETA_PLAN_ID = in_beta_plan_id 
LOOP 
    /* your two INSERT statements come here */ 
END LOOP;

详见the documentation。

来源

2017-03-06 10:29:30

需要关于postgres代码的for循环的建议

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