viirya commented on a change in pull request #31966:
URL: https://github.com/apache/spark/pull/31966#discussion_r606941405
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/NestedColumnAliasing.scala
##########
@@ -231,6 +231,27 @@ object NestedColumnAliasing {
* of it.
*/
object GeneratorNestedColumnAliasing {
+ // Partitions `attrToAliases` based on whether the attribute is in
Generator's output.
+ private def aliasesOnGeneratorOutput(
+ attrToAliases: Map[ExprId, Seq[Alias]],
+ generatorOutput: Seq[Attribute]) = {
+ val generatorOutputExprId = generatorOutput.map(_.exprId)
+ attrToAliases.partition { k =>
+ generatorOutputExprId.contains(k._1)
+ }
+ }
+
+ // Partitions `nestedFieldToAlias` based on whether the attribute of nested
field extractor
+ // is in Generator's output.
+ private def nestedFieldOnGeneratorOutput(
+ nestedFieldToAlias: Map[ExtractValue, Alias],
+ generatorOutput: Seq[Attribute]) = {
+ val generatorOutputSet = AttributeSet(generatorOutput)
+ nestedFieldToAlias.partition { pair =>
+ pair._1.references.subsetOf(generatorOutputSet)
+ }
+ }
Review comment:
If you don't mind, I prefer keep it as functions. This rule is already a
bit complicated. Inlining these code make it looks harder to read.
##########
File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/NestedColumnAliasingSuite.scala
##########
@@ -336,7 +336,7 @@ class NestedColumnAliasingSuite extends SchemaPruningTest {
val query = companies
.generate(Explode('employers.getField("company")), outputNames =
Seq("company"))
- .select('company.getField("name"))
+ .select('company.getField("name"), 'company.getField("address"))
Review comment:
okay. revised.
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