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From "Parth Chandra (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-5240) Parquet reader creates unnecessary objects when checking for nullability in var length columns
Date Fri, 03 Feb 2017 00:56:52 GMT
Parth Chandra created DRILL-5240:
------------------------------------

             Summary: Parquet reader creates unnecessary objects when checking for nullability
in var length columns
                 Key: DRILL-5240
                 URL: https://issues.apache.org/jira/browse/DRILL-5240
             Project: Apache Drill
          Issue Type: Bug
          Components: Storage - Parquet
            Reporter: Parth Chandra
            Assignee: Parth Chandra


In {{NullableVarLengthValuesColumn.java}} we have the following line of code:
{code}
currentValNull = variableWidthVector.getAccessor().getObject(valuesReadInCurrentPass) == null;
{code}
which creates an object to check nullability of every (nullable var char) value being read.
This object creation is expensive and can be replaced with a simple check for the null bit.




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