How to find one sub element in array in impala
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
add a comment |
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
add a comment |
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
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
hive impala
asked Nov 21 '18 at 5:06
FireFire
338
338
add a comment |
add a comment |
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