cloud-fan commented on a change in pull request #26741: [SPARK-30104][SQL] Fix
catalog resolution for 'global_temp'
URL: https://github.com/apache/spark/pull/26741#discussion_r353705982
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/LookupCatalog.scala
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@@ -133,7 +133,11 @@ private[sql] trait LookupCatalog extends Logging {
// For example, if the name of a custom catalog is the same with
`GLOBAL_TEMP_DATABASE`,
// this custom catalog can't be accessed.
if (nameParts.head.equalsIgnoreCase(globalTempDB)) {
Review comment:
How about we follow the table loopup logic here
```
object CatalogAndIdentifierParts {
def unapply(nameParts: Seq[String]): Option[(CatalogPlugin, Seq[String])]
= {
if (nameParts.length == 1) {
Some((currentCatalog, currentNamespace ++ nameParts))
} else if (nameParts.length == 2 &&
nameParts.head.equalsIgnoreCase(globalTempDB)) {
Some((catalogManager.v2SessionCatalog, nameParts))
} else {
try ... catch ...
}
}
}
```
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