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Posted to dev@pig.apache.org by "Alan Gates (JIRA)" <ji...@apache.org> on 2009/11/12 05:27:40 UTC
[jira] Assigned: (PIG-278) Allow no alias in Dot schema definition
in Dot LogicalPlanLoader
[ https://issues.apache.org/jira/browse/PIG-278?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alan Gates reassigned PIG-278:
------------------------------
Assignee: Pi Song
> Allow no alias in Dot schema definition in Dot LogicalPlanLoader
> ----------------------------------------------------------------
>
> Key: PIG-278
> URL: https://issues.apache.org/jira/browse/PIG-278
> Project: Pig
> Issue Type: Bug
> Reporter: Pi Song
> Assignee: Pi Song
> Attachments: AllowNoAliasSchemaInDot.patch, AllowNoAliasSchemaInDot2.patch
>
>
> Our schema parser doesn't allow "null" alias but we have to be able to do that in Dot test files.
> This is a work around by introducing "[NoAlias]" keyword in schema definition just for Dot LogicalPlanLoader.
> Sample:-
> {noformat}
> foreach [ key="20", type="LOForEach" , schema="[NoAlias] : long, [NoAlias] : byteArray" ] ;
> {noformat}
> At runtime, [NoAlias] will be substituted by dummy column names before being sent to the parser. Subsequently those names will be replaced by "null". There is no changes in the actual query parser.
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