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[SPARK-26312][SQL]Replace RDDConversions.rowToRowRdd with RowEncoder to improve its conversion performance #23262

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eatoncys wants to merge 7 commits into from
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[SPARK-26312][SQL]Replace RDDConversions.rowToRowRdd with RowEncoder to improve its conversion performance #23262

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ddb2528
Converting converters in RDDConversions into arrays to improve their …
eatoncys Dec 8, 2018
89f3191
Using RowEncoder
eatoncys Dec 10, 2018
907d3f3
Using same parameter
eatoncys Dec 10, 2018
56cf4e5
indent
eatoncys Dec 10, 2018
41937f5
Remove RDDConversions
eatoncys Dec 10, 2018
e8817e3
Remove RDDConversions
eatoncys Dec 10, 2018
9758534
Remove RDDConversions
eatoncys Dec 10, 2018
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Converting converters in RDDConversions into arrays to improve their … 
…access performance
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@eatoncys
eatoncys committed Dec 8, 2018
commit ddb252892a439281b16bc14fdfdb7faf756f1067
4 changes: 2 additions & 2 deletions sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
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Expand Up @@ -33,7 +33,7 @@ object RDDConversions {
data.mapPartitions { iterator =>
val numColumns = outputTypes.length
val mutableRow = new GenericInternalRow(numColumns)
val converters = outputTypes.map(CatalystTypeConverters.createToCatalystConverter)
val converters = outputTypes.map(CatalystTypeConverters.createToCatalystConverter).toArray
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@cloud-fan cloud-fan Dec 9, 2018

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shall we use ExpressionEncoder here?

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@eatoncys eatoncys Dec 10, 2018

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It is a good suggestion, and has been modified, would you like to review it again, thanks.

iterator.map { r =>
var i = 0
while (i < numColumns) {
Expand All @@ -53,7 +53,7 @@ object RDDConversions {
data.mapPartitions { iterator =>
val numColumns = outputTypes.length
val mutableRow = new GenericInternalRow(numColumns)
val converters = outputTypes.map(CatalystTypeConverters.createToCatalystConverter)
val converters = outputTypes.map(CatalystTypeConverters.createToCatalystConverter).toArray
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@cloud-fan cloud-fan Dec 9, 2018

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shall we use RowEncoder here?

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@eatoncys eatoncys Dec 10, 2018

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It has been modified, and the performance is the same as converting to arrays.

iterator.map { r =>
var i = 0
while (i < numColumns) {
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