jzhuge commented on a change in pull request #25735: [SPARK-29030][SQL]
Simplify lookupV2Relation
URL: https://github.com/apache/spark/pull/25735#discussion_r323880243
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
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@@ -970,25 +966,24 @@ class Analyzer(
tableName: Seq[String],
changes: Seq[TableChange]): Option[AlterTable] = {
lookupV2Relation(tableName) match {
- case scala.Left((v2Catalog, ident, tableOpt)) =>
+ case (Some(table), Some((catalog, ident))) =>
Some(AlterTable(
- v2Catalog.asTableCatalog,
+ catalog,
ident,
-
tableOpt.map(DataSourceV2Relation.create).getOrElse(UnresolvedRelation(tableName)),
- changes
- ))
- case scala.Right(tableOpt) =>
- tableOpt.map { table =>
- AlterTable(
- sessionCatalog.asTableCatalog,
- Identifier.of(tableName.init.toArray, tableName.last),
- DataSourceV2Relation.create(table),
- changes
- )
- }
+ DataSourceV2Relation.create(table),
+ changes))
+ case (Some(table), None) =>
+ Some(AlterTable(
+ sessionCatalog.asTableCatalog, // table being resolved means this
exists
Review comment:
Good suggestion. This may inspire an even further simplification. Let me
explore and report back.
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