imback82 commented on a change in pull request #27391: [SPARK-30612][SQL]
Resolve qualified column name with v2 tables
URL: https://github.com/apache/spark/pull/27391#discussion_r374271073
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/package.scala
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@@ -128,90 +127,65 @@ package object expressions {
m.mapValues(_.distinct).map(identity)
}
- /** Map to use for direct case insensitive attribute lookups. */
- @transient private lazy val direct: Map[String, Seq[Attribute]] = {
+ /** Attribute name to attributes */
+ @transient private val attrsMap: Map[String, Seq[Attribute]] = {
unique(attrs.groupBy(_.name.toLowerCase(Locale.ROOT)))
}
- /** Map to use for qualified case insensitive attribute lookups with 2
part key */
- @transient private lazy val qualified: Map[(String, String),
Seq[Attribute]] = {
- // key is 2 part: table/alias and name
- val grouped = attrs.filter(_.qualifier.nonEmpty).groupBy {
- a => (a.qualifier.last.toLowerCase(Locale.ROOT),
a.name.toLowerCase(Locale.ROOT))
- }
- unique(grouped)
- }
-
- /** Map to use for qualified case insensitive attribute lookups with 3
part key */
- @transient private val qualified3Part: Map[(String, String, String),
Seq[Attribute]] = {
Review comment:
I reverted this change. thanks for the suggestion.
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