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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5546) Schema change problems caused by empty batch
Date Wed, 30 Aug 2017 20:50:00 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16148029#comment-16148029
] 

ASF GitHub Bot commented on DRILL-5546:
---------------------------------------

Github user jinfengni commented on a diff in the pull request:

    https://github.com/apache/drill/pull/906#discussion_r136185442
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/record/AbstractSingleRecordBatch.java
---
    @@ -125,4 +131,19 @@ public BatchSchema getSchema() {
     
       protected abstract boolean setupNewSchema() throws SchemaChangeException;
       protected abstract IterOutcome doWork();
    +
    +  /**
    +   * Default behavior to handle fast NONE (incoming's first next() return NONE, in stead
of OK_NEW_SCHEMA):
    +   * FAST NONE could happen when the underneath Scan operators do not produce any batch
with schema.
    +   *
    --- End diff --
    
    done


> Schema change problems caused by empty batch
> --------------------------------------------
>
>                 Key: DRILL-5546
>                 URL: https://issues.apache.org/jira/browse/DRILL-5546
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Jinfeng Ni
>            Assignee: Jinfeng Ni
>
> There have been a few JIRAs opened related to schema change failure caused by empty batch.
This JIRA is opened as an umbrella for all those related JIRAS ( such as DRILL-4686, DRILL-4734,
DRILL4476, DRILL-4255, etc).
>  



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