How to get the current time stamp in PIG

问题

I have a query with respect to a PIG script that I am writing.

How can I get the current Unix Time Stamp in PIG script.? Do I need any UDF for the purpose.. or can PIG provide me the currnet time stamp ?

Kindly advice me. Thanks

回答1:

I am pointing two solutions

first one:

use CurrentTime(),convert it to ToUnixTime() for need to get timestamp.

Ex:
 X = load "xx"  .........  ;

 X1 = FOREACH X GENERATE ToUnixTime(CurrentTime())

second one:

Passing from command line as a parameter.

   pig  -f  myscript.pig --param timestamp=$(date +%s)

   ----in myscript.pig ----

     %declare time '$timestamp ';

     X1 = FOREACH X GENERATE '$time' ;

回答2:

You do need to use a UDF. Good news is that it ships with Pig. It's called CurrentTime. Take a look at the docs page here for all the built-in functions.

来源：https://stackoverflow.com/questions/29206808/how-to-get-the-current-time-stamp-in-pig