How to find one sub element in array in impala












0















I have one table :



CREATE TABLE test
(
id BIGINT,
, product ARRAY < STRUCT <
component_name: STRING
, price: Double
>>
) STORED AS PARQUET;


I want to



select id,'my_name' in component_name from test,test.product


Actually failed.
How to realize,one way is to use one sub query and get result from group by .



select id,sum(flag)>0 from
(select id,if(component_name=='my_name',1,0) flag from test,test.product)
group by id


But it's too expansive,can anyone tell me one more better way?










share|improve this question



























    0















    I have one table :



    CREATE TABLE test
    (
    id BIGINT,
    , product ARRAY < STRUCT <
    component_name: STRING
    , price: Double
    >>
    ) STORED AS PARQUET;


    I want to



    select id,'my_name' in component_name from test,test.product


    Actually failed.
    How to realize,one way is to use one sub query and get result from group by .



    select id,sum(flag)>0 from
    (select id,if(component_name=='my_name',1,0) flag from test,test.product)
    group by id


    But it's too expansive,can anyone tell me one more better way?










    share|improve this question

























      0












      0








      0








      I have one table :



      CREATE TABLE test
      (
      id BIGINT,
      , product ARRAY < STRUCT <
      component_name: STRING
      , price: Double
      >>
      ) STORED AS PARQUET;


      I want to



      select id,'my_name' in component_name from test,test.product


      Actually failed.
      How to realize,one way is to use one sub query and get result from group by .



      select id,sum(flag)>0 from
      (select id,if(component_name=='my_name',1,0) flag from test,test.product)
      group by id


      But it's too expansive,can anyone tell me one more better way?










      share|improve this question














      I have one table :



      CREATE TABLE test
      (
      id BIGINT,
      , product ARRAY < STRUCT <
      component_name: STRING
      , price: Double
      >>
      ) STORED AS PARQUET;


      I want to



      select id,'my_name' in component_name from test,test.product


      Actually failed.
      How to realize,one way is to use one sub query and get result from group by .



      select id,sum(flag)>0 from
      (select id,if(component_name=='my_name',1,0) flag from test,test.product)
      group by id


      But it's too expansive,can anyone tell me one more better way?







      hive impala






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 21 '18 at 5:06









      FireFire

      338




      338
























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