如果产品\u deals足够小，请构建有效产品数组，与用户\u product交叉联接，并使用数组\u contains检查产品是否有效：

set hive.auto.convert.join=true;
set hive.auto.convert.join.noconditionaltask=true;
set hive.mapjoin.smalltable.filesize=1000000000; --adjust to small table size
set hive.auto.convert.join.noconditionaltask=1000000000;
with valid_product as (
select collect_set(product_id) as list
 from PRODUCT_DEAILS
where product_status='valid'
sort by product_id
)
insert overwrite table USER_PRODUCT
select p.user_id,
    case when array_contains(v.list, p.product1_id) then p.product1_id end product1_id,
    case when array_contains(v.list, p.product2_id) then p.product2_id end product2_id,
    case when array_contains(v.list, p.product3_id) then p.product3_id end product3_id,
    case when array_contains(v.list, p.product4_id) then p.product4_id end product4_id,
    case when array_contains(v.list, p.product5_id) then p.product5_id end product5_id,
    case when array_contains(v.list, p.product6_id) then p.product6_id end product6_id,
    case when array_contains(v.list, p.product7_id) then p.product7_id end product7_id,
    case when array_contains(v.list, p.product8_id) then p.product8_id end product8_id,
    case when array_contains(v.list, p.product9_id) then p.product9_id end product9_id,
    case when array_contains(v.list, p.product10_id) then p.product10_id end product10_id 
  from USER_PRODUCT p
       cross join valid_product v; --cross join with single row containing array

如果产品太大，无法放入数组中，则使用公共联接：

set hive.auto.convert.join=true;
set hive.auto.convert.join.noconditionaltask=true;
set hive.mapjoin.smalltable.filesize=1000000000; --adjust to small table size
set hive.auto.convert.join.noconditionaltask=1000000000;
with valid_product as (
select distinct product_id --Get distinct IDs of valid products
 from PRODUCT_DEAILS
where product_status='valid'
)
insert overwrite table USER_PRODUCT
select p.user_id,
    case when v1.product_id is not null then p.product1_id end product1_id,
    case when v2.product_id is not null then p.product2_id end product2_id,
    case when v3.product_id is not null then p.product3_id end product3_id,
    case when v4.product_id is not null then p.product4_id end product4_id,
    case when v5.product_id is not null then p.product5_id end product5_id,
    case when v6.product_id is not null then p.product6_id end product6_id,
    case when v7.product_id is not null then p.product7_id end product7_id,
    case when v8.product_id is not null then p.product8_id end product8_id,
    case when v9.product_id is not null then p.product9_id end product9_id,
    case when v10.product_id is not null then p.product10_id end product10_id 
  from USER_PRODUCT p
       left join valid_product v1 on p.product1_id=v1.product_id 
       left join valid_product v2 on p.product2_id=v2.product_id 
       left join valid_product v3 on p.product3_id=v3.product_id 
       left join valid_product v4 on p.product4_id=v4.product_id 
       left join valid_product v5 on p.product5_id=v5.product_id 
       left join valid_product v6 on p.product6_id=v6.product_id 
       left join valid_product v7 on p.product7_id=v7.product_id 
       left join valid_product v8 on p.product8_id=v8.product_id 
       left join valid_product v9 on p.product9_id=v9.product_id 
       left join valid_product v10 on p.product10_id=v10.product_id;