Text pig拉丁语-使用文本限定符加载

我正试图加载一个用pig拉丁语编写的数据文件， 数据有2列，但第2列中有一个文本限定符，示例数据如下：

DEVICE_ID,SUPPORTED_TECH
a2334,"GSM900,GSM1500,GSM200"
a54623,"GSM900,GSM1500"
a86646,"GSM1500,GSM200"

当我尝试按如下方式加载日期时，第2列不会被识别为1列

deviceList = load 'deviceList.csv' Using PigStorage(',') as (DEVICE_ID:chararray, SUPPORTED_TECH:chararray );

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加载数据集时如何定义文本限定符？

试试这个，如果需要不同的输出格式，请告诉我

input.txt

DEVICE_ID,SUPPORTED_TECH
a2334,"GSM900,GSM1500,GSM200"
a54623,"GSM900,GSM1500"
a86646,"GSM1500,GSM200

PigScript:

A = LOAD 'input.txt' AS line;
deviceList = FOREACH A GENERATE FLATTEN(REGEX_EXTRACT_ALL(line,'^(\\w+),(.*)$')) as (DEVICE_ID:chararray, SUPPORTED_TECH:chararray );
DUMP deviceList;

(DEVICE_ID,SUPPORTED_TECH)
(a2334,"GSM900,GSM1500,GSM200")
(a54623,"GSM900,GSM1500")
(a86646,"GSM1500,GSM200")

输出：

A = LOAD 'input.txt' AS line;
deviceList = FOREACH A GENERATE FLATTEN(REGEX_EXTRACT_ALL(line,'^(\\w+),(.*)$')) as (DEVICE_ID:chararray, SUPPORTED_TECH:chararray );
DUMP deviceList;

(DEVICE_ID,SUPPORTED_TECH)
(a2334,"GSM900,GSM1500,GSM200")
(a54623,"GSM900,GSM1500")
(a86646,"GSM1500,GSM200")

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您期望的输出是什么？thnx对于答案，这适用于2列，但我的原始文件有625列。您能在不定义每列的情况下重新返回任何内容吗？