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Posted to issues@calcite.apache.org by "Khai Tran (JIRA)" <ji...@apache.org> on 2019/06/07 18:44:00 UTC
[jira] [Comment Edited] (CALCITE-3122) Convert Pig Latin scripts
into Calcite logical plan
[ https://issues.apache.org/jira/browse/CALCITE-3122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16858893#comment-16858893 ]
Khai Tran edited comment on CALCITE-3122 at 6/7/19 6:43 PM:
------------------------------------------------------------
Yes, I extended the RelBuider to create logical operators out of Pig logical plans. No physical operators generated. It's a complete solution with several thousands lines of code.
was (Author: khaitran):
Yes, I extended the RelBuider to create logical operators out of Pig logical plans. No physical operator generated. It's a complete solution with several thousands lines of code.
> Convert Pig Latin scripts into Calcite logical plan
> ----------------------------------------------------
>
> Key: CALCITE-3122
> URL: https://issues.apache.org/jira/browse/CALCITE-3122
> Project: Calcite
> Issue Type: New Feature
> Components: core, piglet
> Reporter: Khai Tran
> Priority: Major
>
> We create an internal Calcite repo at LinkedIn and develop APIs to parse any Pig Latin scripts into Calcite logical plan. The code was tested in nearly ~1000 Pig scripts written at LinkedIn.
> Changes:
> 1. piglet: main conversion code live there, include:
> * APIs to convert any Pig scripts into RelNode plans or SQL statements
> * Use Pig Grunt parser to parse Pig Latin scripts into Pig logical plan (DAGs)
> * Convert Pig schemas into RelDatatype
> * Traverse through Pig expression plan and convert Pig expressions into RexNodes
> * Map some basic Pig UDFs to Calcite SQL operators
> * Build Calcite UDFs for any other Pig UDFs, including UDFs written in both Java and Python
> * Traverse (DFS) through Pig logical plans to convert each Pig logical nodes to RelNodes
> * Have an optimizer rule to optimize Pig group/cogroup into Aggregate operators
> 2. core:
> * Implement other RelNode in Rel2Sql so that Pig can be translated into SQL
> * Other minor changes in a few other classes to make Pig to Calcite works
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