Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/14114#discussion_r70172672
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -442,6 +442,10 @@ class SessionCatalog(
name.database.isEmpty &&
tempTables.contains(formatTableName(name.table))
}
+ def listTemporaryTableOutput(name: String): Seq[Attribute] = {
--- End diff --
Ah. I remember that why I do this in this way. Basically, there are two
barriers to reach `getTableMetadata`. Before making change, let me describe
here.
1. Redirecting: `listColumns(table)` -> `listColumns(currentDatabase,
tableName)`
2. Table existence failure: `requireTableExists(dbName, tableName)` in
`listColumns(currentDatabase, tableName)`.
Anyway, I'm trying to change the above barriers.
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