Pete Robbins created SPARK-12470:
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Summary: Incorrect calculation of row size in
o.a.s.catalyst.expressions.codegen.GenerateUnsafeRowJoiner
Key: SPARK-12470
URL: https://issues.apache.org/jira/browse/SPARK-12470
Project: Spark
Issue Type: Bug
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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