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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-2288) ScanBatch violates IterOutcome protocol for zero-row sources [was: missing JDBC metadata (schema) for 0-row results...]
Date Mon, 02 Nov 2015 05:13:27 GMT

    [ https://issues.apache.org/jira/browse/DRILL-2288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14984752#comment-14984752
] 

ASF GitHub Bot commented on DRILL-2288:
---------------------------------------

Github user jacques-n commented on a diff in the pull request:

    https://github.com/apache/drill/pull/228#discussion_r43597587
  
    --- Diff: contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/HBaseRecordReader.java
---
    @@ -142,10 +148,12 @@ public void setup(OperatorContext context, OutputMutator output)
throws Executio
               getOrCreateFamilyVector(column.getRootSegment().getPath(), false);
             }
           }
    -      logger.debug("Opening scanner for HBase table '{}', Zookeeper quorum '{}', port
'{}', znode '{}'.",
    -          hbaseTableName, hbaseConf.get(HConstants.ZOOKEEPER_QUORUM),
    -          hbaseConf.get(HBASE_ZOOKEEPER_PORT), hbaseConf.get(HConstants.ZOOKEEPER_ZNODE_PARENT));
    -      hTable = new HTable(hbaseConf, hbaseTableName);
    +      // Add vector for any column families not mentioned yet (in order to avoid
    +      // creation of dummy NullableIntVectors for them).
    +      for (HColumnDescriptor columnFamily :
    --- End diff --
    
    This also needs to be done for any requested column vectors.


> ScanBatch violates IterOutcome protocol for zero-row sources [was: missing JDBC metadata
(schema) for 0-row results...]
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: DRILL-2288
>                 URL: https://issues.apache.org/jira/browse/DRILL-2288
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Storage - Information Schema
>            Reporter: Daniel Barclay (Drill)
>            Assignee: Daniel Barclay (Drill)
>             Fix For: 1.3.0
>
>         Attachments: Drill2288NoResultSetMetadataWhenZeroRowsTest.java
>
>
> The ResultSetMetaData object from getMetadata() of a ResultSet is not set up (getColumnCount()
returns zero, and trying to access any other metadata throws IndexOutOfBoundsException) for
a result set with zero rows, at least for one from DatabaseMetaData.getColumns(...).



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