Apache pig 如何在ApachePig上将时间和日期转换为Unix时间戳？

我有一个元组，包含（日期、时间、ip、id）

我需要将日期和时间转换为Unix时间戳

(1398280470, 192.168.5.28, al00000)

我该怎么做呢？

Ref:

A = LOAD 'input_data.csv' USING PigStorage(',')  AS (date:chararray,time:chararray,ip:chararray,id:chararray);
B = FOREACH A GENERATE ToUnixTime(ToDate(CONCAT(date, time),'dd/MM/yyyyHH:mm:ss', 'GMT')) AS unix_time, ip, id;

输入：

23/04/2014,19:14:30,192.168.5.28,al00000

(1398280470,192.168.5.28,al00000)

清管器脚本：

A = LOAD 'input_data.csv' USING PigStorage(',')  AS (date:chararray,time:chararray,ip:chararray,id:chararray);
B = FOREACH A GENERATE ToUnixTime(ToDate(CONCAT(date, time),'dd/MM/yyyyHH:mm:ss', 'GMT')) AS unix_time, ip, id;

输出：

23/04/2014,19:14:30,192.168.5.28,al00000

(1398280470,192.168.5.28,al00000)

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你试过谷歌搜索unixtimestamp apache pig吗？