如何重写嵌套的子查询,使hive能够运行它们

7vux5j2d  于 2021-04-02  发布在  Hive
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select  
  cd_gender,
  cd_marital_status,
  cd_education_status,
  count(*) cnt1,
  cd_purchase_estimate,
  count(*) cnt2,
  cd_credit_rating,
  count(*) cnt3,
  cd_dep_count,
  count(*) cnt4,
  cd_dep_employed_count,
  count(*) cnt5,
  cd_dep_college_count,
  count(*) cnt6
 from
  customer c,customer_address ca,customer_demographics
 where
  c.c_current_addr_sk = ca.ca_address_sk and
  ca_county in ('Greer County','Boone County','Cumberland County','Tyler County','Marion County') and
  cd_demo_sk = c.c_current_cdemo_sk and 
  exists (select *
          from store_sales,date_dim
          where c.c_customer_sk = ss_customer_sk and
                ss_sold_date_sk = d_date_sk and
                d_year = 1999 and
                d_moy between 1 and 1+3) and
   (exists (select *
            from web_sales,date_dim
            where c.c_customer_sk = ws_bill_customer_sk and
                  ws_sold_date_sk = d_date_sk and
                  d_year = 1999 and
                  d_moy between 1 ANd 1+3) or 
    exists (select * 
            from catalog_sales,date_dim
            where c.c_customer_sk = cs_ship_customer_sk and
                  cs_sold_date_sk = d_date_sk and
                  d_year = 1999 and
                  d_moy between 1 and 1+3))
 group by cd_gender,
          cd_marital_status,
          cd_education_status,
          cd_purchase_estimate,
          cd_credit_rating,
          cd_dep_count,
          cd_dep_employed_count,
          cd_dep_college_count
 order by cd_gender,
          cd_marital_status,
          cd_education_status,
          cd_purchase_estimate,
          cd_credit_rating,
          cd_dep_count,
          cd_dep_employed_count,
          cd_dep_college_count
limit 100;

当我在hive上运行这个查询时,它返回了这个错误。
"failed: semanticexception [error 10249]: org.apache.hadoop.hive.ql.optimizer.calcite.calcitesubquerysemanticexception: line 23:2 unsupported subquery expression '3': only subquery expressions that are top level conjuncts are allowed "
这个错误是由于第二个existence语句包含了一个嵌套的子查询而发生的。有什么办法可以让我重写这个查询,使它能在hive上工作?

ldfqzlk8

ldfqzlk81#

你可以尝试重新安排查询的顺序,以防止出现子查询。在sql中,条件是以序列方式计算的,所以运算符的优先性应该没有问题。

where
    exists (select *
            from web_sales,date_dim
            where c.c_customer_sk = ws_bill_customer_sk and
                  ws_sold_date_sk = d_date_sk and
                  d_year = 1999 and
                  d_moy between 1 ANd 1+3) or 
    exists (select * 
            from catalog_sales,date_dim
            where c.c_customer_sk = cs_ship_customer_sk and
                  cs_sold_date_sk = d_date_sk and
                  d_year = 1999 and
                  d_moy between 1 and 1+3) and
  c.c_current_addr_sk = ca.ca_address_sk and
  ca_county in ('Greer County','Boone County','Cumberland County','Tyler County','Marion County') and
  cd_demo_sk = c.c_current_cdemo_sk and 
  exists (select *
          from store_sales,date_dim
          where c.c_customer_sk = ss_customer_sk and
                ss_sold_date_sk = d_date_sk and
                d_year = 1999 and
                d_moy between 1 and 1+3)

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