Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/19086#discussion_r136723544
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -573,28 +573,29 @@ class SessionCatalog(
* If no database is specified, this will first attempt to rename a
temporary table with
* the same name, then, if that does not exist, rename the table in the
current database.
*
- * This assumes the database specified in `newName` matches the one in
`oldName`.
+ * If the database specified in `newName` is different from the one
specified in `oldName`,
+ * It will result in moving table across databases.
*/
def renameTable(oldName: TableIdentifier, newName: TableIdentifier):
Unit = synchronized {
- val db = formatDatabaseName(oldName.database.getOrElse(currentDb))
- newName.database.map(formatDatabaseName).foreach { newDb =>
- if (db != newDb) {
- throw new AnalysisException(
- s"RENAME TABLE source and destination databases do not match:
'$db' != '$newDb'")
- }
- }
+ val oldDb = formatDatabaseName(oldName.database.getOrElse(currentDb))
+ val newDb = formatDatabaseName(newName.database.getOrElse(currentDb))
val oldTableName = formatTableName(oldName.table)
val newTableName = formatTableName(newName.table)
- if (db == globalTempViewManager.database) {
+ if (oldDb == globalTempViewManager.database || newDb ==
globalTempViewManager.database) {
+ if (oldDb != newDb) {
--- End diff --
Add comment above
> // when either old table or new table is a global temporary view
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