Apache pig 使用Pig将可读字符串日期转换为日期?
我将以下人类可读的日期格式存储在文本文件中:Apache pig 使用Pig将可读字符串日期转换为日期?,apache-pig,Apache Pig,我将以下人类可读的日期格式存储在文本文件中: Wed Oct 15 09:26:09 BST 2014 Wed Oct 15 19:26:09 BST 2014 Wed Oct 18 08:26:09 BST 2014 Wed Oct 23 10:26:09 BST 2014 Sun Oct 05 09:26:09 BST 2014 Wed Nov 20 19:26:09 BST 2014 如何使用转换日期以使其与Pig的ToDate()函数兼容,在该函数中,我可以使用GetHour()、Ge
Wed Oct 15 09:26:09 BST 2014
Wed Oct 15 19:26:09 BST 2014
Wed Oct 18 08:26:09 BST 2014
Wed Oct 23 10:26:09 BST 2014
Sun Oct 05 09:26:09 BST 2014
Wed Nov 20 19:26:09 BST 2014
如何使用转换日期以使其与Pig的ToDate()函数兼容,在该函数中,我可以使用GetHour()、GetYear()、GetDay()和GetMonth()将日期范围约束和逻辑应用于我的查询?1。Pig只支持几种日期格式,因此您需要根据以下格式之一转换日期和时间。
2.您的输入将BST作为时区,但不支持在pig BST中,因此您需要选择与BST等效的其他时区。
这里有时区 示例:
Wed Oct 15 09:26:09 BST 2014
Wed Oct 15 19:26:09 BST 2014
Wed Oct 18 08:26:09 BST 2014
Wed Oct 23 10:26:09 BST 2014
Sun Oct 05 09:26:09 BST 2014
Wed Nov 20 19:26:09 BST 2014
PigScript:
A = LOAD 'input.txt' USING PigStorage(' ') AS(day:chararray,month:chararray,date:chararray,time:chararray,tzone:chararray,year:chararray);
B = FOREACH A GENERATE CONCAT(CONCAT(CONCAT(CONCAT(day,', ',date),' ',month),' ',year),' ',time) AS mytime;
C = FOREACH B GENERATE ToDate(mytime,'EEE, d MMM yyyy HH:mm:ss','GMT') AS newTime;
D = FOREACH C GENERATE GetMonth(newTime),GetDay(newTime),GetYear(newTime),GetHour(newTime),GetMinute(newTime);
DUMP D;
(10,15,2014,9,26)
(10,15,2014,19,26)
(10,15,2014,8,26)
(10,22,2014,10,26)
(10,5,2014,9,26)
(11,19,2014,19,26)
输出:
A = LOAD 'input.txt' USING PigStorage(' ') AS(day:chararray,month:chararray,date:chararray,time:chararray,tzone:chararray,year:chararray);
B = FOREACH A GENERATE CONCAT(CONCAT(CONCAT(CONCAT(day,', ',date),' ',month),' ',year),' ',time) AS mytime;
C = FOREACH B GENERATE ToDate(mytime,'EEE, d MMM yyyy HH:mm:ss','GMT') AS newTime;
D = FOREACH C GENERATE GetMonth(newTime),GetDay(newTime),GetYear(newTime),GetHour(newTime),GetMinute(newTime);
DUMP D;
(10,15,2014,9,26)
(10,15,2014,19,26)
(10,15,2014,8,26)
(10,22,2014,10,26)
(10,5,2014,9,26)
(11,19,2014,19,26)
1.Pig只支持几种日期格式,因此您需要根据以下格式之一转换日期和时间。
2.您的输入将BST作为时区,但不支持在pig BST中,因此您需要选择与BST等效的其他时区。
这里有时区 示例:
Wed Oct 15 09:26:09 BST 2014
Wed Oct 15 19:26:09 BST 2014
Wed Oct 18 08:26:09 BST 2014
Wed Oct 23 10:26:09 BST 2014
Sun Oct 05 09:26:09 BST 2014
Wed Nov 20 19:26:09 BST 2014
PigScript:
A = LOAD 'input.txt' USING PigStorage(' ') AS(day:chararray,month:chararray,date:chararray,time:chararray,tzone:chararray,year:chararray);
B = FOREACH A GENERATE CONCAT(CONCAT(CONCAT(CONCAT(day,', ',date),' ',month),' ',year),' ',time) AS mytime;
C = FOREACH B GENERATE ToDate(mytime,'EEE, d MMM yyyy HH:mm:ss','GMT') AS newTime;
D = FOREACH C GENERATE GetMonth(newTime),GetDay(newTime),GetYear(newTime),GetHour(newTime),GetMinute(newTime);
DUMP D;
(10,15,2014,9,26)
(10,15,2014,19,26)
(10,15,2014,8,26)
(10,22,2014,10,26)
(10,5,2014,9,26)
(11,19,2014,19,26)
输出:
A = LOAD 'input.txt' USING PigStorage(' ') AS(day:chararray,month:chararray,date:chararray,time:chararray,tzone:chararray,year:chararray);
B = FOREACH A GENERATE CONCAT(CONCAT(CONCAT(CONCAT(day,', ',date),' ',month),' ',year),' ',time) AS mytime;
C = FOREACH B GENERATE ToDate(mytime,'EEE, d MMM yyyy HH:mm:ss','GMT') AS newTime;
D = FOREACH C GENERATE GetMonth(newTime),GetDay(newTime),GetYear(newTime),GetHour(newTime),GetMinute(newTime);
DUMP D;
(10,15,2014,9,26)
(10,15,2014,19,26)
(10,15,2014,8,26)
(10,22,2014,10,26)
(10,5,2014,9,26)
(11,19,2014,19,26)
绝妙的解决方案。谢谢你对我的问题做出的友好回应。这是一个绝妙的解决方案。谢谢你对我的问题的友好回应。