apache pig - how to flatten, denormalize in pig -


मैं निम्नलिखित स्कीमा से एक चपटा शामिल तालिका बनाना चाहूंगा 

  titles = FOREACH कार्यक्रम जेनरेट करें (px.pig.udf.PARSE_KEYWORDS (program_xml)) प्रोग्राम: (रूट_आईडी: लंबी, आईडी: बैग {(आईडीटीइप: चारराय, आईडीवल्यू: चारराय)}, कीवर्ड: बैग {(कुंजी प्रकार: चारराय, कुंजी मूल्य: चारार्रे )}); अगर इनपुट है  
  (1, {('x', 'foo'), ('y', 'bar')},   
 {}} (2, {('x', 'fiz'), ('y', 'buzz')}, {}) (2, {('x', 'moo')}, {}) ..   
 आउटपुट कुछ ऐसा होना चाहिए:  
  root_id idvalue 1 foo 1 बार 2 फ़ज़ी 2 buzz 3 moo   
 मैं सुअर में कैसे करूँगा?   
 
 
     
  1.  
     परियोजना के पहले दो स्तंभ ।  
     एक्स = विदेशी खिताब root_id उत्पन्न करते हैं, आईडी;   
  2.  
     दूसरे स्तंभ पर समतल करें।  
     y = foreach एक्स उत्पन्न root_id, FLATTEN (आईडी) के रूप में (idtype: chararray, idvalue: chararray);    
     यह आपको परिणाम देगा निम्न स्वरूप में: रूट_आईडी आईडीटाइप आयडेल्यूईईएक्स 1 एक्स एफयू  
     1 वाई बार  
     2 x फ़ज़ी  
     2 y buzz  
     3 एक्स म्यू  
     आवश्यक परिणाम प्राप्त करने के लिए पहला और तीसरा स्तंभ प्रोजेक्ट।

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