[jira] [Created] (PIG-3207) Pig fails with horrible and untraceable error when semi-colon is inside a comment that splits a statement

["Sal Uryasev (JIRA)" <ji...@apache.org>]

Sal Uryasev created PIG-3207:
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             Summary: Pig fails with horrible and untraceable error when semi-colon is inside a comment that splits a statement
                 Key: PIG-3207
                 URL: https://issues.apache.org/jira/browse/PIG-3207
             Project: Pig
          Issue Type: Bug
    Affects Versions: 0.10.0
            Reporter: Sal Uryasev


If a semi-colon is included in a comment that splits a GENERATE statement, Pig fails with either this error:
ERROR 1200: <line 0, column -1>  Syntax error, unexpected symbol at or near 'null'
or just:
ERROR 1200: null

This error does not happen if the comment does not split a statement.  I did not test this with non-GENERATE statements.

This happens both in grunt and when running a pig script from a file, though it obviously is way more frustrating with the file.  It is always baffling when deleting a comment makes the code work.

Grunt example:

grunt> m = LOAD '/user/suryasev/fips2.txt' USING PigStorage('\t');
grunt> n = FOREACH m GENERATE $4 as first_item, $5 as second_item;
grunt> describe n;
n: {first_item: bytearray,second_item: bytearray}
grunt> k = FOREACH n GENERATE first_item, --some comment;         
2013-02-22 00:19:29,974 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1200: <line 0, column -1>  Syntax error, unexpected symbol at or near 'null'
Details at logfile: /export/home/suryasev/pig_1361492310408.log

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