Description
Sample code
$ cat test/foreach.pig daily = load 'nyse' as (exchange, symbol); grpd = group daily by exchange; uniquecnt = foreach grpd { sym = daily.symbol; uniq_sym = distinct sym; generate group, uniq_sym; }; another = FOREACH uniquecnt GENERATE group; explain another;
This breaks when it tries to prune uniq_sym->sym->innerload_daily
2012-10-12 14:54:11,031 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2000: Error processing rule ColumnMapKeyPrune. Try -t ColumnMapKeyPrune