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[SPARK-26450][SQL] Avoid rebuilding map of schema for every column in projection #23392

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bersprockets wants to merge 12 commits into from
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[SPARK-26450][SQL] Avoid rebuilding map of schema for every column in projection #23392

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6b66711
Initial commit
bersprockets Dec 12, 2018
a9dbbec
Initial try at helper function
bersprockets Dec 29, 2018
67a943a
Use helper function
bersprockets Dec 31, 2018
3362744
More uses of helper function
bersprockets Dec 31, 2018
306e0a5
Even more uses of helper function
bersprockets Dec 31, 2018
a25b59c
Some clean up
bersprockets Jan 2, 2019
b977d3e
Review feedback
bersprockets Jan 2, 2019
1497d3a
Fix style issue
bersprockets Jan 2, 2019
777c5b4
Move helper function to BindReferences
bersprockets Jan 4, 2019
fbd6787
Handle cases missed before
bersprockets Jan 4, 2019
686e7b5
Review feedback
bersprockets Jan 5, 2019
b1afb3a
Close gap in ExpandExec
bersprockets Jan 13, 2019
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@bersprockets
bersprockets committed Jan 2, 2019
commit b977d3e70ba59f537168a778533a6d1ff9a07a34
5 changes: 2 additions & 3 deletions sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/package.scala
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Expand Up @@ -90,9 +90,8 @@ package object expressions {
*/
def toBoundExprs[A <: Expression](
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@hvanhovell hvanhovell Jan 3, 2019

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I would like to minimize the chance that future changes suffer from the same issue. In order to do that we should provide API in a logical place, it does not make a whole lot of sense to me that I need to look in package.scala to find a more performant version of BindReferences.bindReference(..) for a seq. Can we move this function to BindReference and name it bindReferences?

exprs: Seq[A],
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@mgaido91 mgaido91 Jan 2, 2019

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nit: indent

inputSchema: Seq[Attribute]): Seq[A] = {
lazy val inputSchemaAttrSeq: AttributeSeq = inputSchema
exprs.map(BindReferences.bindReference(_, inputSchemaAttrSeq))
inputSchema: AttributeSeq): Seq[A] = {
exprs.map(BindReferences.bindReference(_, inputSchema))
}

/**
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3 changes: 1 addition & 2 deletions sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala
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Expand Up @@ -393,8 +393,7 @@ case class SortMergeJoinExec(
input: Seq[Attribute]): Seq[ExprCode] = {
ctx.INPUT_ROW = row
ctx.currentVars = null
val inputAttributeSeq: AttributeSeq = input
keys.map(BindReferences.bindReference(_, inputAttributeSeq).genCode(ctx))
toBoundExprs(keys, input).map(_.genCode(ctx))
}

private def copyKeys(ctx: CodegenContext, vars: Seq[ExprCode]): Seq[ExprCode] = {
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