Depending upon where it is placed in your pig script it will be invoked
in either map or reduce phase.
To get better understanding of your pig script execution plan you can do
this from the grunt shell
explain -script <your-script> -dot -out <dot-output-file>
You can then feed the dot output file into a dot parser to generate the
DAG in jpg/gif format
-...@nkur
prasenjit mukherjee wrote:
Just wondering if I can use the DEFINE command to write my custom
mapper/reducer functions. Mapper ( I believe) I can, but what not sure
about reducer. I guess this depends how the define commands are invoked.
-Prasen
