Koji Noguchi created PIG-2970:
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Summary: Nested foreach getting incorrect schema when having
unrelated inner query
Key: PIG-2970
URL: https://issues.apache.org/jira/browse/PIG-2970
Project: Pig
Issue Type: Bug
Components: parser
Reporter: Koji Noguchi
Assignee: Koji Noguchi
Priority: Minor
While looking at PIG-2968, hit a weird error message.
{noformat}
$ cat -n test/foreach2.pig
1 daily = load 'nyse' as (exchange, symbol);
2 grpd = group daily by exchange;
3 unique = foreach grpd {
4 sym = daily.symbol;
5 uniq_sym = distinct sym;
6 --ignoring uniq_sym result
7 generate group, daily;
8 };
9 describe unique;
10 zzz = foreach unique generate group;
11 explain zzz;
% pig -x local -t ColumnMapKeyPrune test/foreach2.pig
...
unique: {symbol: bytearray}
2012-10-12 16:55:44,226 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
1025:
<file test/foreach2.pig, line 10, column 30> Invalid field projection.
Projected field [group] does not exist in schema: symbol:bytearray.
...
{noformat}
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