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changes.mady.by.user Vineet Garg

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We plan to limit the scope with following assumption/limitations

  • Subqueries could only be top level expressions in select i.e. subqueries in complex expressions, aggregates, UDFs etc will not be supported for now. e.g. following queries will not run on HIVE

    Code Block
    languagesql
    -- subquery in non-simple expression
SELECT 1 + (SELECT SUM(ship_charge) FROM orders), customer.customer_num FROM customer
 
-- subquery in CASE
SELECT CASE WHEN (select count(*) from store_sales 
                  where ss_quantity between 1 and 20) > 409437
            THEN (select avg(ss_ext_list_price) 
                  from store_sales 
                  where ss_quantity between 1 and 20) 
            ELSE (select avg(ss_net_paid_inc_tax)
                  from store_sales
                  where ss_quantity between 1 and 20) end bucket1
FROM reason
WHERE r_reason_sk = 1

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