Fwd: Handling empty string in avro file

[Jegan <je...@gmail.com>]

Hi All,

I am using avro file format to load the data in to hive and source system
is Teradata.  In the source i have a both NULL and empty string. But when
it landed in the hive its storing both as NULL only. For example

{
  "type" : "record",
  "name" : "Personal",
  "fields" : [ {
    "name" : "Id",
    "type" : [ "null", "int" ]
  }, {
    "name" : "name",
    "type" : [ "null", "string" ]
  }, {
    "name" : "age",
    "type" : [ "null", "int" ]
  }, {
    "name" : "zipcode",
    "type" : [ "null", "int" ]         --> have tried as "type" :int,
"default" : ""
  }]
}

Since integer value is empty in source, by above one comes as null as
defined i tried give "type" : int as well and comes as NULL.

Is there any way where i can get the empty string as it is in source.
Because in my landing hive table should contain both NULL and emptystring
and it has a different meaning for us . Your help would be appreciable.

Thank you

Regards,
Jegan

Re: Handling empty string in avro file

[Ryan Blue <rb...@netflix.com.INVALID>]

Jegan,

It looks like the problem is that your zipcode type can't be a String. An
empty string isn't a valid value for int. You probably want to use null or
string for that field.

rb

On Mon, Mar 21, 2016 at 7:42 PM, Jegan <je...@gmail.com> wrote:

> Hi All,
>
> I am using avro file format to load the data in to hive and source system
> is Teradata.  In the source i have a both NULL and empty string. But when
> it landed in the hive its storing both as NULL only. For example
>
> {
>   "type" : "record",
>   "name" : "Personal",
>   "fields" : [ {
>     "name" : "Id",
>     "type" : [ "null", "int" ]
>   }, {
>     "name" : "name",
>     "type" : [ "null", "string" ]
>   }, {
>     "name" : "age",
>     "type" : [ "null", "int" ]
>   }, {
>     "name" : "zipcode",
>     "type" : [ "null", "int" ]         --> have tried as "type" :int,
> "default" : ""
>   }]
> }
>
> Since integer value is empty in source, by above one comes as null as
> defined i tried give "type" : int as well and comes as NULL.
>
> Is there any way where i can get the empty string as it is in source.
> Because in my landing hive table should contain both NULL and emptystring
> and it has a different meaning for us . Your help would be appreciable.
>
> Thank you
>
> Regards,
> Jegan
>



-- 
Ryan Blue
Software Engineer
Netflix