miklosgergely commented on a change in pull request #543: HIVE-21292: Break up
DDLTask 1 - extract Database related operations
URL: https://github.com/apache/hive/pull/543#discussion_r259392471
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/exec/ddl/database/AlterDatabaseDesc.java
##########
@@ -16,112 +16,100 @@
* limitations under the License.
*/
-package org.apache.hadoop.hive.ql.plan;
+package org.apache.hadoop.hive.ql.exec.ddl.database;
import java.io.Serializable;
import java.util.Map;
+import org.apache.hadoop.hive.ql.exec.ddl.DDLDesc;
+import org.apache.hadoop.hive.ql.exec.ddl.DDLTask2;
import org.apache.hadoop.hive.ql.parse.ReplicationSpec;
+import org.apache.hadoop.hive.ql.plan.Explain;
import org.apache.hadoop.hive.ql.plan.Explain.Level;
+import org.apache.hadoop.hive.ql.plan.PrincipalDesc;
/**
- * AlterDatabaseDesc.
- *
+ * DDL task description for ALTER DATABASE commands.
*/
@Explain(displayName = "Alter Database", explainLevels = { Level.USER,
Level.DEFAULT, Level.EXTENDED })
public class AlterDatabaseDesc extends DDLDesc implements Serializable {
-
private static final long serialVersionUID = 1L;
- // Only altering the database property and owner is currently supported
- public static enum ALTER_DB_TYPES {
- ALTER_PROPERTY, ALTER_OWNER, ALTER_LOCATION
- };
-
- ALTER_DB_TYPES alterType;
- String databaseName;
- Map<String, String> dbProperties;
- PrincipalDesc ownerPrincipal;
- ReplicationSpec replicationSpec;
- String location;
+ static {
+ DDLTask2.registerOperator(AlterDatabaseDesc.class,
AlterDatabaseOperation.class);
+ }
/**
- * For serialization only.
+ * Supported type of alter db commands.
+ * Only altering the database property and owner is currently supported
*/
- public AlterDatabaseDesc() {
- }
+ public enum AlterDbType {
+ ALTER_PROPERTY, ALTER_OWNER, ALTER_LOCATION
+ };
- public AlterDatabaseDesc(String databaseName, Map<String, String> dbProps,
Review comment:
Basically AlterDatabaseOperation (or in more general every XXXOperation
could be a task as well, and every XXXDesc could have their own XXXWork class.
But that would mean a lot of repetitive code, so having a common Task, and Work
class for them is just reusing the same boilerplate code. Having a separate SA
is a good idea, I think when DDLTask is cut to pieces the next step should be a
to cut DDLSemanticAnalyzer too!
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