hadoop-pig-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Santhosh Srinivasan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-159) Make changes to the parser to support new types functionality
Date Tue, 13 May 2008 18:35:55 GMT

     [ https://issues.apache.org/jira/browse/PIG-159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Santhosh Srinivasan updated PIG-159:
------------------------------------

    Attachment: parser_chages_v5.patch

This patch contains the following:

1. Type information in the schemas for AS
2. The expression operators return a field schema instead of a schema
3. LOUnion getSchema method uses the schema merge method

Note:

1. bag{} represents a bag of unkown
2.Add test case for checking conflicting aliases in LOGenerate

> Make changes to the parser to support new types functionality
> -------------------------------------------------------------
>
>                 Key: PIG-159
>                 URL: https://issues.apache.org/jira/browse/PIG-159
>             Project: Pig
>          Issue Type: Sub-task
>          Components: impl
>            Reporter: Alan Gates
>            Assignee: Alan Gates
>         Attachments: parser_chages_v5.patch
>
>
> In order to support the new types functionality described in http://wiki.apache.org/pig/PigTypesFunctionalSpec,
the parse needs to change in the following ways:
> 1) AS needs to support types in addition to aliases.  So where previously it was legal
to say:
> a = load 'myfile' as a, b, c;
> it will now also be legal to say
> a = load 'myfile' as a integer, b float, c chararray;
> 2) Non string constants need to be supported.  This includes non-string atomic types
(integer, long, float, double) and the non-atomic types bags, tuples, and maps.
> 3) A cast operator needs to be added so that fields can be explicitly casted.
> 4) Changes to DEFINE, to allow users to declare arguments and return types for UDFs

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message