错误 1070：无法使用导入解析 ToDate

Question

详情如下：

date2.txt

B02617,2/27/2015,1551,14677
B02598,2/27/2015,1114,10755
B02512,2/27/2015,272,2056
B02764,2/27/2015,4253,38780

猪脚本：

A = Load '/files/date2.txt' using PigStorage(',') as (base:chararray, tripdate:chararray, cars:int, tripkms:int);

B = FOREACH A GENERATE tripdate;

C = FOREACH B GENERATE ToDate(tripdate,'yyyy-MM-dd') as mytripdate;

这是我收到的错误：

main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1070: Could not resolve ToDate using imports: [, org.apache.pig.builtin., org.apache.pig.impl.builtin.]

Answer 1

输入的日期格式为MM/dd/yyyy。

C = FOREACH B GENERATE ToDate(tripdate,'MM/dd/yyyy') as mytripdate;

如果您希望日期采用 'yyyy-MM-dd' 格式，请使用 ToString()

C = FOREACH B GENERATE ToString(ToDate(tripdate,'MM/dd/yyyy'),'yyyy-MM-dd') as mytripdate;

错误 1070：无法使用导入解析 ToDate

ERROR 1070: Could not resolve ToDate using imports

apache-pig