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https://issues.apache.org/jira/browse/ORC-840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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William Hyun closed ORC-840.
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> Remove Superfluous Array Fill in RecordReaderImpl
> -------------------------------------------------
>
>                 Key: ORC-840
>                 URL: https://issues.apache.org/jira/browse/ORC-840
>             Project: ORC
>          Issue Type: Improvement
>    Affects Versions: 1.8.0
>            Reporter: David Mollitor
>            Assignee: David Mollitor
>            Priority: Minor
>             Fix For: 1.8.0
>
>
> {code:java}
> public static int[] mapSargColumnsToOrcInternalColIdx(
>                             List<PredicateLeaf> sargLeaves,
>                             SchemaEvolution evolution) {
>     int[] result = new int[sargLeaves.size()];
>     Arrays.fill(result, -1);
>     for(int i=0; i < result.length; ++i) {
>       String colName = sargLeaves.get(i).getColumnName();
>       result[i] = findColumns(evolution, colName);
>     }
>     return result;
>   }
> {code}
> There is no reason here to pre-populate {{result}} with -1 values.  They are 
> promptly overwritten in the following loop.



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