Add ALTER VIEW RENAME command for better compatibilty

h2/src/docsrc/help/help.csv

@@ -468,7 +468,7 @@ This command commits an open transaction in this connection.
 ALTER USER SA SET PASSWORD 'rioyxlgt'
 "
 
-"Commands (DDL)","ALTER VIEW","
+"Commands (DDL)","ALTER VIEW RECOMPILE","
 ALTER VIEW [ IF EXISTS ] viewName RECOMPILE
 ","
 Recompiles a view after the underlying tables have been changed or created.
@@ -478,6 +478,15 @@ This command commits an open transaction in this connection.
 ALTER VIEW ADDRESS_VIEW RECOMPILE
 "
 
+"Commands (DDL)","ALTER VIEW RENAME","
+ALTER VIEW [ IF EXISTS ] viewName RENAME TO newName
+","
+Renames a view.
+This command commits an open transaction in this connection.
+","
+ALTER VIEW TEST RENAME TO MY_VIEW
+"
+
 "Commands (DDL)","ANALYZE","
 ANALYZE [ TABLE tableName ] [ SAMPLE_SIZE rowCountInt ]
 ","

h2/src/main/org/h2/command/Parser.java

@@ -5767,19 +5767,31 @@ public class Parser {
         return command;
     }
 
-    private AlterView parseAlterView() {
-        AlterView command = new AlterView(session);
+    private DefineCommand parseAlterView() {
         boolean ifExists = readIfExists(false);
-        command.setIfExists(ifExists);
         String viewName = readIdentifierWithSchema();
-        Table tableView = getSchema().findTableOrView(session, viewName);
+        Schema schema = getSchema();
+        Table tableView = schema.findTableOrView(session, viewName);
         if (!(tableView instanceof TableView) && !ifExists) {
             throw DbException.get(ErrorCode.VIEW_NOT_FOUND_1, viewName);
         }
-        TableView view = (TableView) tableView;
-        command.setView(view);
-        read("RECOMPILE");
-        return command;
+        if (readIf("RENAME")) {
+            read("TO");
+            String newName = readIdentifierWithSchema(schema.getName());
+            checkSchema(schema);
+            AlterTableRename command = new AlterTableRename(session, getSchema());
+            command.setOldTableName(viewName);
+            command.setNewTableName(newName);
+            command.setIfTableExists(ifExists);
+            return command;
+        } else {
+            read("RECOMPILE");
+            TableView view = (TableView) tableView;
+            AlterView command = new AlterView(session);
+            command.setIfExists(ifExists);
+            command.setView(view);
+            return command;
+        }
     }
 
     private Prepared parseAlterSchema() {

h2/src/test/org/h2/test/scripts/TestScript.java

@@ -123,8 +123,8 @@ public class TestScript extends TestDb {
                 "uuid", "varchar", "varchar-ignorecase" }) {
             testScript("datatypes/" + s + ".sql");
         }
-        for (String s : new String[] { "alterTableAdd", "alterTableDropColumn",
-                "createAlias", "createSynonym", "createView", "createTable", "createTrigger",
+        for (String s : new String[] { "alterTableAdd", "alterTableDropColumn", "alterTableRename",
+                "createAlias", "createSynonym", "createTable", "createTrigger", "createView",
                 "dropDomain", "dropIndex", "dropSchema", "truncateTable" }) {
             testScript("ddl/" + s + ".sql");
         }

h2/src/test/org/h2/test/scripts/ddl/alterTableRename.sql

+-- Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
+-- and the EPL 1.0 (http://h2database.com/html/license.html).
+-- Initial Developer: H2 Group
+--
+
+-- Test for ALTER TABLE RENAME and ALTER VIEW RENAME
+
+CREATE TABLE TABLE1A(ID INT);
+> ok
+
+INSERT INTO TABLE1A VALUES (1);
+> update count: 1
+
+-- ALTER TABLE RENAME
+
+ALTER TABLE TABLE1A RENAME TO TABLE1B;
+> ok
+
+SELECT * FROM TABLE1B;
+>> 1
+
+ALTER TABLE IF EXISTS TABLE1B RENAME TO TABLE1C;
+> ok
+
+SELECT * FROM TABLE1C;
+>> 1
+
+ALTER TABLE BAD RENAME TO SMTH;
+> exception TABLE_OR_VIEW_NOT_FOUND_1
+
+ALTER TABLE IF EXISTS BAD RENAME TO SMTH;
+> ok
+
+-- ALTER VIEW RENAME
+
+CREATE VIEW VIEW1A AS SELECT * FROM TABLE1C;
+> ok
+
+ALTER VIEW VIEW1A RENAME TO VIEW1B;
+> ok
+
+SELECT * FROM VIEW1B;
+>> 1
+
+ALTER TABLE IF EXISTS VIEW1B RENAME TO VIEW1C;
+> ok
+
+SELECT * FROM VIEW1C;
+>> 1
+
+ALTER VIEW BAD RENAME TO SMTH;
+> exception VIEW_NOT_FOUND_1
+
+ALTER VIEW IF EXISTS BAD RENAME TO SMTH;
+> ok
+
+SELECT * FROM VIEW1C;
+>> 1
+
+DROP TABLE TABLE1C CASCADE;
+> ok