hadoopstructhivehiveqlcomplextype

How do you insert data into complex data type "Struct" in Hive

I'm completely new to Hive and Stack Overflow. I'm trying to create a table with complex data type "STRUCT" and then populate it using INSERT INTO TABLE in Hive.

I'm using the following code:

CREATE TABLE struct_test
(
 address STRUCT<
                houseno:    STRING
               ,streetname: STRING
               ,town:       STRING
               ,postcode:   STRING
               >
);

INSERT INTO TABLE struct_test
SELECT NAMED_STRUCT('123', 'GoldStreet', London', W1a9JF') AS address
FROM dummy_table
LIMIT 1;

I get the following error:

Error while compiling statement: FAILED: semanticException [Error 10044]: Cannot insert into target because column number type are different 'struct_test': Cannot convert column 0 from struct to array>.

I was able to use similar code with success to create and populate a data type Array but am having difficulty with Struct. I've tried lots of code examples I've found online but none of them seem to work for me... I would really appreciate some help on this as I've been stuck on it for quite a while now! Thanks.

Solution

  • your sql error. you should use sql:

    INSERT INTO TABLE struct_test 
       SELECT NAMED_STRUCT('houseno','123','streetname','GoldStreet', 'town','London', 'postcode','W1a9JF') AS address 
           FROM dummy_table LIMIT 1;