Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/14531#discussion_r74001182
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala ---
@@ -80,13 +83,49 @@ case class CreateTableLikeCommand(
s"Source table in CREATE TABLE LIKE cannot be temporary:
'$sourceTable'")
}
- val tableToCreate = catalog.getTableMetadata(sourceTable).copy(
- identifier = targetTable,
- tableType = CatalogTableType.MANAGED,
- createTime = System.currentTimeMillis,
- lastAccessTime = -1).withNewStorage(locationUri = None)
+ val sourceTableDesc = catalog.getTableMetadata(sourceTable)
- catalog.createTable(tableToCreate, ifNotExists)
+ sourceTableDesc.tableType match {
+ case CatalogTableType.MANAGED | CatalogTableType.EXTERNAL |
CatalogTableType.VIEW => // OK
+ case o => throw new AnalysisException(
+ s"CREATE TABLE LIKE is not allowed when the source table is
${o.name}")
+ }
+
+ if (DDLUtils.isDatasourceTable(sourceTableDesc) &&
+ sourceTableDesc.tableType != CatalogTableType.MANAGED) {
+ throw new AnalysisException(
+ "CREATE TABLE LIKE is not allowed when the source table is an
external table created " +
+ "using the datasource API")
+ }
+
+ // For EXTERNAL_TABLE, the table properties has a particular field. To
change it
+ // to a MANAGED_TABLE, we need to remove it; Otherwise, it will be
EXTERNAL_TABLE,
+ // even if we set the tableType to MANAGED
+ //
(metastore/src/java/org/apache/hadoop/hive/metastore/ObjectStore.java#L1095-L1105)
+ // Table comment is stored as a table property. To clean it, we also
should remove them.
+ val newTableProp =
+ sourceTableDesc.properties.filterKeys(key => key != "EXTERNAL" &&
key != "comment")
+ val newSerdeProp =
+ if (DDLUtils.isDatasourceTable(sourceTableDesc)) {
+ val newPath = catalog.defaultTablePath(targetTable)
+ sourceTableDesc.storage.properties ++ Map("path" -> newPath)
+ } else {
+ sourceTableDesc.storage.properties
+ }
+ val newTableDesc =
+ sourceTableDesc.copy(
--- End diff --
Almost the same. The following attributes need to be kept: `storage`,
`schema`, `provider`, `partitionColumnNames`, `bucketSpec`, `properties`, and
`unsupportedFeatures`.
Found another bug... `owner` should be replaced...
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
