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https://issues.apache.org/jira/browse/SPARK-47085?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Izek Greenfield updated SPARK-47085:
------------------------------------
Description:
This new complexity was introduced in SPARK-39041.
before this PR the code was:
{code:java}
def toTTableSchema(schema: StructType): TTableSchema = {
val tTableSchema = new TTableSchema()
schema.zipWithIndex.foreach { case (f, i) =>
tTableSchema.addToColumns(toTColumnDesc(f, i))
}
tTableSchema
} {code}
foreach without the _*O(n^2)*_ complexity so this change just return the state
to what it was before.
In class `RowSetUtils` there is a loop that has _*O(n^2)*_ complexity:
{code:scala}
...
while (i < rowSize) {
val row = rows(I)
...
{code}
It can be easily converted back into _*O( n )*_ complexity.
was:
This new complexity was introduced in SPARK-39041.
In class `RowSetUtils` there is a loop that has _*O(n^2)*_ complexity:
{code:scala}
...
while (i < rowSize) {
val row = rows(I)
...
{code}
It can be easily converted back into _*O( n )*_ complexity.
> Preformance issue on thrift API
> -------------------------------
>
> Key: SPARK-47085
> URL: https://issues.apache.org/jira/browse/SPARK-47085
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.4.1, 3.5.0
> Reporter: Izek Greenfield
> Assignee: Izek Greenfield
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> This new complexity was introduced in SPARK-39041.
> before this PR the code was:
> {code:java}
> def toTTableSchema(schema: StructType): TTableSchema = {
> val tTableSchema = new TTableSchema()
> schema.zipWithIndex.foreach { case (f, i) =>
> tTableSchema.addToColumns(toTColumnDesc(f, i))
> }
> tTableSchema
> } {code}
> foreach without the _*O(n^2)*_ complexity so this change just return the
> state to what it was before.
>
> In class `RowSetUtils` there is a loop that has _*O(n^2)*_ complexity:
> {code:scala}
> ...
> while (i < rowSize) {
> val row = rows(I)
> ...
> {code}
> It can be easily converted back into _*O( n )*_ complexity.
>
>
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