[GitHub] drill pull request #1091: DRILL-6071: Limit batch size for flatten operator

[paul-rogers]

Github user paul-rogers commented on a diff in the pull request:

    https://github.com/apache/drill/pull/1091#discussion_r162225575
  
    --- Diff: 
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/flatten/FlattenRecordBatch.java
 ---
    @@ -94,8 +98,54 @@ private void clear() {
         }
       }
     
    +  private class FlattenMemoryManager {
    +    private final int outputRowCount;
    +    private static final int OFFSET_VECTOR_WIDTH = 4;
    +    private static final int WORST_CASE_FRAGMENTATION_FACTOR = 2;
    +    private static final int MAX_NUM_ROWS = 64 * 1024;
    --- End diff --
    
    `ValueVector.MAX_ROW_COUNT`


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