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https://issues.apache.org/jira/browse/PIG-1947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13019952#comment-13019952
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Xuefu Zhang commented on PIG-1947:
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Because currently a user script is parsed by at least two parsers (grunt parser
and query parser), the line number is lost or incorrect reported due to a
simplistic design. To fully address the problem, the following is required:
1. Grunt parser needs to be changed to passing more information to query parser
about the source location of each line of the query. Right now, only a line
number is passed alone.
2. Query parser needs a more sophisticated design to capture the source
location of the script received from grunt parser. Currently, it caches the
script lines in a list, which cannot fully recover the locations when query is
subsequently parsed.
3. A clear semantic of line number is to be defined in interactive mode,
especially in case of invalid query lines.
> Incorrect line number is reported during parsing
> ------------------------------------------------
>
> Key: PIG-1947
> URL: https://issues.apache.org/jira/browse/PIG-1947
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.9.0
> Reporter: Xuefu Zhang
> Assignee: Xuefu Zhang
> Fix For: 0.10
>
> Attachments: PIG-1947-2.patch, PIG-1947.patch
>
>
> In case of errors in script, Pig parser doesn't report correct the line
> number always. For example:
> script:
> A = load 'x' as ( u:int, v:chararray );
> sh ls -l;
> B = foreach A generate u + v;
> store B into 'y';
> error reported:
> 2011-03-30 17:48:04,649 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 1039: <file line.pig, line 2, column 25> (Name: Add Type: int Uid:
> 7)incompatible types in Add Operator left hand side:Unknown right hand
> side:Unknown
> Incorrect line number is also reported when a single line contains multiple
> Pig statement, such as:
> A = load 'x' as( u:int, v:chararray); B = foreach A generate u + v;
> store B into 'y';
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