org.h2.command.ddl.AlterSchemaRename Maven / Gradle / Ivy
/*
* Copyright 2004-2022 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.command.ddl;
import java.util.ArrayList;
import org.h2.api.ErrorCode;
import org.h2.command.CommandInterface;
import org.h2.engine.Database;
import org.h2.engine.SessionLocal;
import org.h2.message.DbException;
import org.h2.schema.Schema;
import org.h2.schema.SchemaObject;
/**
* This class represents the statement
* ALTER SCHEMA RENAME
*/
public class AlterSchemaRename extends DefineCommand {
private Schema oldSchema;
private String newSchemaName;
public AlterSchemaRename(SessionLocal session) {
super(session);
}
public void setOldSchema(Schema schema) {
oldSchema = schema;
}
public void setNewName(String name) {
newSchemaName = name;
}
@Override
public long update() {
session.getUser().checkSchemaAdmin();
Database db = session.getDatabase();
if (!oldSchema.canDrop()) {
throw DbException.get(ErrorCode.SCHEMA_CAN_NOT_BE_DROPPED_1, oldSchema.getName());
}
if (db.findSchema(newSchemaName) != null || newSchemaName.equals(oldSchema.getName())) {
throw DbException.get(ErrorCode.SCHEMA_ALREADY_EXISTS_1, newSchemaName);
}
db.renameDatabaseObject(session, oldSchema, newSchemaName);
ArrayList all = new ArrayList<>();
for (Schema schema : db.getAllSchemas()) {
schema.getAll(all);
for (SchemaObject schemaObject : all) {
db.updateMeta(session, schemaObject);
}
all.clear();
}
return 0;
}
@Override
public int getType() {
return CommandInterface.ALTER_SCHEMA_RENAME;
}
}