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[SPARK-33822][SQL] Use the CastSupport.cast method in HashJoin #30818

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[SPARK-33822][SQL] Use the CastSupport.cast method in HashJoin #30818

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7e33df3
Fix
maropu Dec 17, 2020
0739fda
test fixes
maropu Dec 17, 2020
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13 changes: 7 additions & 6 deletions sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,8 @@

package org.apache.spark.sql.execution.joins

import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.{InternalRow, SQLConfHelper}
import org.apache.spark.sql.catalyst.analysis.CastSupport
import org.apache.spark.sql.catalyst.expressions._
import org.apache.spark.sql.catalyst.expressions.BindReferences.bindReferences
import org.apache.spark.sql.catalyst.expressions.codegen._
Expand Down Expand Up @@ -756,7 +757,7 @@ trait HashJoin extends BaseJoinExec with CodegenSupport {
protected def prepareRelation(ctx: CodegenContext): HashedRelationInfo
}

object HashJoin {
object HashJoin extends CastSupport with SQLConfHelper {
/**
* Try to rewrite the key as LongType so we can use getLong(), if they key can fit with a long.
*
Expand All @@ -771,14 +772,14 @@ object HashJoin {
}

var keyExpr: Expression = if (keys.head.dataType != LongType) {
Cast(keys.head, LongType)
cast(keys.head, LongType)
} else {
keys.head
}
keys.tail.foreach { e =>
val bits = e.dataType.defaultSize * 8
keyExpr = BitwiseOr(ShiftLeft(keyExpr, Literal(bits)),
BitwiseAnd(Cast(e, LongType), Literal((1L << bits) - 1)))
BitwiseAnd(cast(e, LongType), Literal((1L << bits) - 1)))
}
keyExpr :: Nil
}
Expand All @@ -791,13 +792,13 @@ object HashJoin {
// jump over keys that have a higher index value than the required key
if (keys.size == 1) {
assert(index == 0)
Cast(BoundReference(0, LongType, nullable = false), keys(index).dataType)
cast(BoundReference(0, LongType, nullable = false), keys(index).dataType)
} else {
val shiftedBits =
keys.slice(index + 1, keys.size).map(_.dataType.defaultSize * 8).sum
val mask = (1L << (keys(index).dataType.defaultSize * 8)) - 1
// build the schema for unpacking the required key
Cast(BitwiseAnd(
cast(BitwiseAnd(
ShiftRightUnsigned(BoundReference(0, LongType, nullable = false), Literal(shiftedBits)),
Literal(mask)), keys(index).dataType)
}
Expand Down