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From "Jie Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-2593) Filter by a boolean value does not work
Date Tue, 05 Jun 2012 23:21:24 GMT

    [ https://issues.apache.org/jira/browse/PIG-2593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13289845#comment-13289845
] 

Jie Li commented on PIG-2593:
-----------------------------

Fixed case 5 in a light way: added a virtual node "BOOL_COND" in QueryParser and implemented
it with the original expression in LogicalPlanGenerator. Will attach the patch soon.

Actually there is a Case 6 in the e2e test:

|6|no schema and filter|a = load 'allscalar10k' as (name, age, gpa, instate);
b = filter a by instate;
dump b;| Error: <file 2.pig, line 9, column 4> Filter's condition must evaluate to boolean.
Found: bytearray

After discussing with Daniel, we decided to leave this case for now, as it may require some
heavy-weight changes.
                
> Filter by a boolean value does not work
> ---------------------------------------
>
>                 Key: PIG-2593
>                 URL: https://issues.apache.org/jira/browse/PIG-2593
>             Project: Pig
>          Issue Type: Bug
>          Components: build
>            Reporter: Daniel Dai
>
> The following script does not work:
> {code}
> a = load 'allscalar10k' as (name, age, gpa, instate);
> b = filter a by instate;
> explain b;
> {code}
> Exception:
> ERROR 1200: <file 18.pig, line 2, column 23>  mismatched input ';' expecting IS
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1000: Error during parsing.
<file 18.pig, line 2, column 23>  mismatched input ';' expecting IS
>         at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1598)
>         at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:1541)
>         at org.apache.pig.PigServer.registerQuery(PigServer.java:541)
>         at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:945)
>         at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:392)
>         at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:190)
>         at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:166)
>         at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:84)
>         at org.apache.pig.Main.run(Main.java:599)
>         at org.apache.pig.Main.main(Main.java:153)
> Caused by: Failed to parse: <file 18.pig, line 2, column 23>  mismatched input
';' expecting IS
>         at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:222)
>         at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:164)
>         at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1590)
>         ... 9 more
> It works if we change the script into:
> {code}
> a = load 'allscalar10k' as (name, age, gpa, instate);
> b = filter a by instate==TRUE;
> explain b;
> {code}

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