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Posted to dev@mrql.apache.org by "Leonidas Fegaras (JIRA)" <ji...@apache.org> on 2016/02/11 15:42:18 UTC

[jira] [Closed] (MRQL-81) Fix the coercion of persistent collections to in-memory bags

     [ https://issues.apache.org/jira/browse/MRQL-81?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Leonidas Fegaras closed MRQL-81.
--------------------------------
    Resolution: Fixed

> Fix the coercion of persistent collections to in-memory bags 
> -------------------------------------------------------------
>
>                 Key: MRQL-81
>                 URL: https://issues.apache.org/jira/browse/MRQL-81
>             Project: MRQL
>          Issue Type: Bug
>          Components: Run-Time/Flink, Run-Time/MapReduce, Run-Time/Spark
>    Affects Versions: 0.9.6
>            Reporter: Leonidas Fegaras
>            Assignee: Leonidas Fegaras
>            Priority: Critical
>
> Currently, query results that are persistent bags (such as Spark RDDs or Flink DataSets) are coerced to in-memory bags before they are printed. This needs to be done at any place in the query result. This came out when we used matrix factorization (query/factorization.mrql) because its output are the two matrix factors (datasets) in a tuple. It was reported by Ahmed Ulde. It will be fixed by adding a new case for tuple projection in the query evaluator that coerces persistent datasets to bags when they appear in the query output.



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