Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/14114#discussion_r70305796
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -246,9 +246,27 @@ class SessionCatalog(
def getTableMetadata(name: TableIdentifier): CatalogTable = {
val db =
formatDatabaseName(name.database.getOrElse(getCurrentDatabase))
val table = formatTableName(name.table)
- requireDbExists(db)
- requireTableExists(TableIdentifier(table, Some(db)))
- externalCatalog.getTable(db, table)
+ val tid = TableIdentifier(table)
+ if (name.database.isEmpty && isTemporaryTable(tid)) {
+ CatalogTable(
+ identifier = tid,
+ tableType = CatalogTableType.VIEW,
+ storage = CatalogStorageFormat.empty,
+ schema = tempTables(table).output.map { c =>
+ CatalogColumn(
+ name = c.name,
+ dataType = c.dataType.catalogString,
+ nullable = c.nullable,
+ comment = Option(c.name)
--- End diff --
The metadata can contain the comment, but it is a bit of a PITA to get out:
`if (c.metadata.contains("comment")) Some(c.metadata.getString("comment"))
else None `
So I am fine with leaving this as it is...
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