Timestamp variable as parameter gives unexpected arguments error

[Shin Chan]

Hello All

 If i give following variable from command line it does not work

 -param TIMESTAMP = 'date +%c'

 It gives error

 java.lang.RuntimeException: Encountered unexpected arguments on command line - 
please check the command line

 But if i enter something like

 TIMESTAMP=`date +%Y-%m-%d` it works , but i want full date including time 
(2012-04-14 11:24 etc) , how to set this.

 I want to capture time stamp at which pig script was started inside the output 
of that script

Thanks and Regards ,