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我正試圖根據第一個模式中的ID從模式中篩選出一組描述。基於Pig中的ID的篩選器組
我對豬很新,所以很難得到這一點。
這裏是我所建的這是不工作的代碼:
changeReason = LOAD 'Change_Reason.txt' USING org.apache.pig.piggybank.storage.CSVExcelStorage('|', 'NO_MULTILINE', 'UNIX', 'SKIP_INPUT_HEADER')
AS (changeReasonID:int, reasonName:chararray);
price = LOAD '$directory/Price.txt' USING org.apache.pig.piggybank.storage.CSVExcelStorage('|', 'NO_MULTILINE', 'UNIX', 'SKIP_INPUT_HEADER')
AS (priceID:int, changeReasonID:int);
priceChangeReasonIDs = GROUP price BY changeReasonID;
subGroup = FOREACH priceChangeReasonIDs
{
change = FILTER changeReason BY changeReasonID == group.changeReasonId;
GENERATE group AS changeID, change.reasonName AS Reason;
};
該代碼給我下面的錯誤:
Failed to parse: Pig script failed to parse:
<file load_historical_price.pig, line 108, column 20> expression is not a project expression: (Name: ScalarExpression) Type: null Uid: null)
Plz。爲用例 –
添加輸入和預期輸出,並提供變換的原始數據,你正在按照PriceChangeReasonId進行分組 – kecso
對不起,我正在取出專有信息,並且transformationRaw應該是價格。現在改變它。 當我將文件放在我面前時,會在今天晚些時候獲取輸入和輸出。 – Khirok