How to count number of rows in alias in PIG?

+1 vote

I did something like this to count the number of rows in an alias in PIG:

logs = LOAD 'log'
logs_w_one = foreach logs generate 1 as one;
logs_group = group logs_w_one all;
logs_count = foreach logs_group generate SUM(logs_w_one.one);
dump logs_count;

This seems to be too inefficient. Is there a better way to do this?

Oct 15, 2018 in Big Data Hadoop by digger
• 26,680 points

edited Oct 16, 2018 by Omkar 690 views

1 answer to this question.

0 votes

COUNT is part of pig

LOGS= LOAD 'log';
LOGS_GROUP= GROUP LOGS ALL;
LOG_COUNT = FOREACH LOGS_GROUP GENERATE COUNT(LOGS);
answered Oct 15, 2018 by Omkar
• 69,030 points

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