我想做的是HBASE
在内部创建嵌套数组PIG
所以基本上我会执行以下操作:
//Loading some address data
CITY = LOAD '/user/root/landingzone/ADRPCDCITY.csv' using PigStorage(';')
AS (dPOST_CODE:chararray, dCITY_CODE:chararray);
//Create the BAG by grouping postal code
B = GROUP CITY by dPOST_CODE;
//Store it in HBASE
STORE B INTO 'hbase://TEST_ADDRESS_VALIDATION'
USING org.apache.pig.backend.hadoop.hbase.HBaseStorage(
'f1: group, f1:CITY' );
我面临的问题是BAG
无法将其强制转换为HBASE
Map类
java.lang.ClassCastException: org.apache.pig.data.InternalCachedBag cannot be cast to java.util.Map
非常感谢您的帮助!
更好的是,我得到了一个我想分享的解决方案
CITY = LOAD '/user/root/landingzone/CITY_Test.csv' using PigStorage(';')
AS (POST_CODE:chararray, CITY_CODE:long, CITY_NAME:chararray);
A = FILTER CITY BY (POST_CODE) IS NOT NULL;
result = FOREACH A GENERATE POST_CODE, TOMAP(UPPER(CITY_NAME), CITY_CODE);
STORE result INTO 'CITY_ADDRESS_VALIDATION' USING org.apache.pig.backend.hadoop.hbase.HBaseStorage( 'f1' );
使用TOMAP并通过HbaseStorage保存它,但不在那里分配映射,就可以了。
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我来说两句