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From Jaanai Zhang <cloud.pos...@gmail.com>
Subject Re: Null array elements with joins
Date Wed, 20 Jun 2018 03:09:52 GMT
what's your Phoenix's version?


----------------------------------------
   Yun Zhang
   Best regards!


2018-06-20 1:02 GMT+08:00 Tulasi Paradarami <tulasi.krishna.p@gmail.com>:

> Hi,
>
> I'm running few tests against Phoenix array and running into this bug
> where array elements return null values when a join is involved. Is this a
> known issue/limitation of arrays?
>
> create table array_test_1 (id integer not null primary key, arr
> tinyint[5]);
> upsert into array_test_1 values (1001, array[0, 0, 0, 0, 0]);
> upsert into array_test_1 values (1002, array[0, 0, 0, 0, 1]);
> upsert into array_test_1 values (1003, array[0, 0, 0, 1, 1]);
> upsert into array_test_1 values (1004, array[0, 0, 1, 1, 1]);
> upsert into array_test_1 values (1005, array[1, 1, 1, 1, 1]);
>
> create table test_table_1 (id integer not null primary key, val varchar);
> upsert into test_table_1 values (1001, 'abc');
> upsert into test_table_1 values (1002, 'def');
> upsert into test_table_1 values (1003, 'ghi');
>
> 0: jdbc:phoenix:localhost> select t1.id, t2.val, t1.arr[1], t1.arr[2],
> t1.arr[3] from array_test_1 as t1 join test_table_1 as t2 on t1.id = t2.id
> ;
> +--------+---------+------------------------+---------------
> ---------+------------------------+
> | T1.ID  | T2.VAL  | ARRAY_ELEM(T1.ARR, 1)  | ARRAY_ELEM(T1.ARR, 2)  |
> ARRAY_ELEM(T1.ARR, 3)  |
> +--------+---------+------------------------+---------------
> ---------+------------------------+
> | 1001   | abc     | null                   | null                   |
> null                   |
> | 1002   | def     | null                   | null                   |
> null                   |
> | 1003   | ghi     | null                   | null                   |
> null                   |
> +--------+---------+------------------------+---------------
> ---------+------------------------+
> 3 rows selected (0.056 seconds)
>
> However, directly selecting array elements from the array returns data
> correctly.
> 0: jdbc:phoenix:localhost> select t1.id, t1.arr[1], t1.arr[2], t1.arr[3]
> from array_test_1 as t1;
> +-------+---------------------+---------------------+-------
> --------------+
> |  ID   | ARRAY_ELEM(ARR, 1)  | ARRAY_ELEM(ARR, 2)  | ARRAY_ELEM(ARR, 3)  |
> +-------+---------------------+---------------------+-------
> --------------+
> | 1001  | 0                   | 0                   | 0                   |
> | 1002  | 0                   | 0                   | 0                   |
> | 1003  | 0                   | 0                   | 0                   |
> | 1004  | 0                   | 0                   | 1                   |
> | 1005  | 1                   | 1                   | 1                   |
> +-------+---------------------+---------------------+-------
> --------------+
> 5 rows selected (0.044 seconds)
>
>
>

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