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Pig, mail # user - how to use '==' to compare chararry(string)


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Re: how to use '==' to compare chararry(string)
Dan Yi 2013-02-27, 17:11
Harsha,

Double quotes works, thank you!

Dan

On 2/26/13 5:49 PM, "Harsha" <[EMAIL PROTECTED]> wrote:

>Dan,
>    If you have double quotes in your data. try following
>B = FILTER A by itemid != '""';  put single quotes .
>It works in pig 0.9.2.
>
>Thanks,
>Harsha
>
>
>On Tuesday, February 26, 2013 at 5:11 PM, Dan Yi wrote:
>
>> Hi,
>>
>> I have this simple file and tried to remove lines that have itemid
>>column as empty string '', but it
>> Won't work, I tried to set the == to some valid itemid in the file see
>>if I can filter out those lines,
>> Still it wont' work,  any one knows how to use the '=='?
>>
>> Pig script:
>>
>> A = LOAD '$DATA' AS
>>(timestamp:chararray,itemid:chararray,actiontype:chararray,actionid:chara
>>rray,anonid:chararray,deviceid:chararray,userid:chararray,mediouserid:cha
>>rarray);
>> B = DISTINCT A PARALLEL 2;
>>
>> -- none of the following filter would work.
>> C = FILTER B BY itemid == '';
>> D = FILTER B BY itemid == '591837';
>> E = FILTER B BY actiontype == 'AddToCart';
>>
>> STORE A INTO 'OUTPUT1/A' USING PigStorage();
>> STORE B INTO 'OUTPUT1/B' USING PigStorage();
>> STORE C INTO 'OUTPUT1/C' USING PigStorage();
>> STORE D INTO 'OUTPUT1/D' USING PigStorage();
>> STORE E INTO 'OUTPUT1/E' USING PigStorage();
>>
>>
>>
>> Data file is attached in the email.
>>
>> Thanks.
>>
>