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https://issues.apache.org/jira/browse/SPARK-12470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pete Robbins updated SPARK-12470:
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Component/s: SQL
Summary: Incorrect calculation of row size in
o.a.s.sql.catalyst.expressions.codegen.GenerateUnsafeRowJoiner (was: Incorrect
calculation of row size in
o.a.s.catalyst.expressions.codegen.GenerateUnsafeRowJoiner)
> Incorrect calculation of row size in
> o.a.s.sql.catalyst.expressions.codegen.GenerateUnsafeRowJoiner
> ---------------------------------------------------------------------------------------------------
>
> Key: SPARK-12470
> URL: https://issues.apache.org/jira/browse/SPARK-12470
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.5.2
> Reporter: Pete Robbins
> Priority: Minor
>
> While looking into https://issues.apache.org/jira/browse/SPARK-12319 I
> noticed that the row size is incorrectly calculated.
> The "sizeReduction" value is calculated in words:
> // The number of words we can reduce when we concat two rows together.
> // The only reduction comes from merging the bitset portion of the two
> rows, saving 1 word.
> val sizeReduction = bitset1Words + bitset2Words - outputBitsetWords
> but then it is subtracted from the size of the row in bytes:
> | out.pointTo(buf, ${schema1.size + schema2.size}, sizeInBytes -
> $sizeReduction);
>
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