Andy,
I think the syntax is right. Here is a similar example that works for me.
0: jdbc:drill:zk=local> select t.batters.batter[0] from
dfs.`/Users/brumsby/drill/donuts.json` t;
+------------+
| EXPR$0 |
+------------+
| {"id":"1001","type":"Regular"} |
+------------+
1 row selected (0.319 seconds)
0: jdbc:drill:zk=local> select t.batters.batter from
dfs.`/Users/brumsby/drill/donuts.json` t;
+------------+
| EXPR$0 |
+------------+
|
[{"id":"1001","type":"Regular"},{"id":"1002","type":"Chocolate"},{"id":"1003","type":"Blueberry"},{"id":"1004","type":"Devil's
Food"}] |
+------------+
1 row selected (0.084 seconds)
On Thu, Jul 31, 2014 at 11:45 AM, Andy Pernsteiner <
[email protected]> wrote:
> Hello, I'm currently attempting to perform queries against a JSON file
> which has some nested elements, some of which are arrays. Here are 2
> records worth of the file:
>
>
>
> {"trans_id":16,"date":"06/08/2012","time":"07:09:25","user_info":{"cust_id":6,"device":"IOS5","state":"tx"},"marketing_info":{"camp_id":17,"keywords":[]},"trans_info":{"prod_id":[65,1233,182,70,90,12,1520,1563,2144],"purch_flag":"false"}}
>
>
> {"trans_id":17,"date":"07/31/2013","time":"16:22:26","user_info":{"cust_id":9,"device":"IOS5","state":"oh"},"marketing_info":{"camp_id":1,"keywords":["careful","us","around","you","whatever","i","how"]},"trans_info":{"prod_id":[10,2597,2658,2202,999],"purch_flag":"false"}}
>
>
>
> Note that the "prod_id" and "keywords" fields contain arrays. Here's an
> example query without trying to specify the array index:
>
> 0: jdbc:drill:> select t.trans_info.prod_id from
> dfs.`/myfiles/JSON/mobile.json` t limit 3;
>
> +------------+
> | EXPR$0 |
> +------------+
> | [1435,673] |
> | [785] |
> | [26] |
> +------------+
> 3 rows selected (0.507 seconds)
>
>
> So, I can see the array elements just fine, but when I try to access a
> specific one I come up w/ nulls:
>
>
> 0: jdbc:drill:> select t.trans_info.prod_id[0] from
> `dfs`.`/myfiles/JSON/mobile.json` t limit 10;
> +------------+
> | EXPR$0 |
> +------------+
> | null |
> | null |
> | null |
> | null |
> | null |
> | null |
> | null |
> | null |
> | null |
> | null |
> +------------+
> 10 rows selected (0.303 seconds)
>
>
> Am I using the correct notation/subscript syntax here?
>
> Thanks!
>
>
> --
> Andy Pernsteiner
> Manager, Field Enablement
> ph: 206.228.0737
>
> www.mapr.com
>
