[jira] [Assigned] (HIVE-23130) User friendly error message when MV rewriting fails

["Krisztian Kasa (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-23130?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Krisztian Kasa reassigned HIVE-23130:
-------------------------------------


> User friendly error message when MV rewriting fails
> ---------------------------------------------------
>
>                 Key: HIVE-23130
>                 URL: https://issues.apache.org/jira/browse/HIVE-23130
>             Project: Hive
>          Issue Type: Task
>          Components: CBO
>            Reporter: Krisztian Kasa
>            Assignee: Krisztian Kasa
>            Priority: Minor
>
> If materialized view rewriting fails because an unsupported SQL clause or operator is used we got an error message like this:
> {code}
> FAILED: SemanticException Cannot enable automatic rewriting for materialized view. Unsupported RelNode type HiveSortExchange encountered in the query plan
> {code}
> This refers to the *HiveSortExchange* operator. This is introduced to CBO plan if the statement has *sort by* clause which may not clear for the user.
> {code}
> create materialized view cmv_mat_view as select a, b, c from cmv_basetable sort by a;
> {code} 



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