/*
Derby - Class org.apache.derby.impl.sql.compile.DropTriggerNode
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to you under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package org.apache.derby.impl.sql.compile;
import org.apache.derby.iapi.sql.compile.CompilerContext;
import org.apache.derby.iapi.sql.dictionary.DataDictionary;
import org.apache.derby.iapi.sql.dictionary.SchemaDescriptor;
import org.apache.derby.iapi.sql.dictionary.TableDescriptor;
import org.apache.derby.iapi.sql.dictionary.TriggerDescriptor;
import org.apache.derby.iapi.reference.SQLState;
import org.apache.derby.iapi.sql.execute.ConstantAction;
import org.apache.derby.iapi.error.StandardException;
import org.apache.derby.iapi.services.context.ContextManager;
import org.apache.derby.iapi.services.sanity.SanityManager;
/**
* A DropTriggerNode is the root of a QueryTree that represents a DROP TRIGGER
* statement.
*
*/
public class DropTriggerNode extends DDLStatementNode
{
private TableDescriptor td;
public String statementToString()
{
return "DROP TRIGGER";
}
/**
* Bind this DropTriggerNode. This means looking up the trigger,
* verifying it exists and getting its table uuid.
*
*
* @exception StandardException Thrown on error
*/
public void bindStatement() throws StandardException
{
CompilerContext cc = getCompilerContext();
DataDictionary dd = getDataDictionary();
SchemaDescriptor sd = getSchemaDescriptor();
TriggerDescriptor triggerDescriptor = null;
if (sd.getUUID() != null)
triggerDescriptor = dd.getTriggerDescriptor(getRelativeName(), sd);
if (triggerDescriptor == null)
{
throw StandardException.newException(SQLState.LANG_OBJECT_NOT_FOUND, "TRIGGER", getFullName());
}
/* Get the table descriptor */
td = triggerDescriptor.getTableDescriptor();
cc.createDependency(td);
cc.createDependency(triggerDescriptor);
}
// inherit generate() method from DDLStatementNode
/**
* Create the Constant information that will drive the guts of Execution.
*
* @exception StandardException Thrown on failure
*/
public ConstantAction makeConstantAction() throws StandardException
{
return getGenericConstantActionFactory().getDropTriggerConstantAction(
getSchemaDescriptor(),
getRelativeName(),
td.getUUID());
}
}