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Posted to dev@pig.apache.org by "Olga Natkovich (JIRA)" <ji...@apache.org> on 2011/04/12 01:58:05 UTC
[jira] [Commented] (PIG-1822) Need to document how types work in
Pig
[ https://issues.apache.org/jira/browse/PIG-1822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13018637#comment-13018637 ]
Olga Natkovich commented on PIG-1822:
-------------------------------------
While figuring out what information is missing from the type related documentation, I found that we have duplicated paragraphs under Schema section:
Schemas
Schemas enable you to assign names to fields and declare types for fields. Schemas are optional but we encourage you to use them whenever possible; type declarations result in better parse-time error checking and more efficient code execution.
Schemas for simple types and complex types can be used anywhere a schema definition is appropriate.
Schemas are defined with the LOAD, STREAM, and FOREACH operators using the AS clause. If you define a schema using the LOAD operator, then it is the load function that enforces the schema (see LOAD and User Defined Functions for more information).
Known Schema Handling
Schemas enable you to assign names to fields and declare types for fields. Schemas are optional but we encourage you to use them whenever possible; type declarations result in better parse-time error checking and more efficient code execution.
Schemas are defined for the LOAD, STREAM, and FOREACH operators using the AS clause. If you define a schema using the LOAD operator, then it is the load function that enforces the schema (see LOAD and User Defined Functions for more information).
> Need to document how types work in Pig
> --------------------------------------
>
> Key: PIG-1822
> URL: https://issues.apache.org/jira/browse/PIG-1822
> Project: Pig
> Issue Type: Improvement
> Components: documentation
> Reporter: Olga Natkovich
> Assignee: Olga Natkovich
> Fix For: 0.9.0
>
>
> What is static and what is dynamic.
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