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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-363) Describe does not produce correct schema for generate with UDF
Date Thu, 07 Aug 2008 17:19:44 GMT

    [ https://issues.apache.org/jira/browse/PIG-363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12620680#action_12620680
] 

Olga Natkovich commented on PIG-363:
------------------------------------

Alan says this is likely that generate code does not query the schema of UDF. He suggested
we look at code in src/org/apache/pig/impl/logicalLayer/validators/TypeCheckingVisitor.java


> Describe does not produce correct schema for generate with UDF
> --------------------------------------------------------------
>
>                 Key: PIG-363
>                 URL: https://issues.apache.org/jira/browse/PIG-363
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: types_branch
>            Reporter: Olga Natkovich
>            Priority: Critical
>             Fix For: types_branch
>
>
> B = foreach A generate string.CONCATSEP(' ', $0, 'foo');
> describe B;
> {chararray}
> UDF has the following outputSchema function:
> public Schema outputSchema(Schema input) {
>                 String name = "concatsep_";
>                 if (input.getAliases().size() > 0)
>                         name += input.getAliases().iterator().next() + "_";
>                 return new Schema(new Schema.FieldSchema(name +  getNextSchemaId(), DataType.CHARARRAY));
>         }

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