/*
Derby - Class org.apache.derby.impl.sql.execute.SavepointConstantAction
Copyright 2003, 2004 The Apache Software Foundation or its licensors, as applicable.
Licensed 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.execute;
import org.apache.derby.iapi.sql.execute.ConstantAction;
import org.apache.derby.iapi.sql.conn.LanguageConnectionContext;
import org.apache.derby.iapi.sql.Activation;
import org.apache.derby.iapi.error.StandardException;
import org.apache.derby.iapi.sql.conn.StatementContext;
import org.apache.derby.iapi.reference.SQLState;
/**
* This class describes actions that are ALWAYS performed for a
* Savepoint (rollback, release and set savepoint) Statement at Execution time.
*/
class SavepointConstantAction extends DDLConstantAction
{
private final String savepointName; //name of the savepoint
private final int savepointStatementType; //Type of savepoint statement ie rollback, release or set savepoint
/**
* Make the ConstantAction for a set savepoint, rollback or release statement.
*
* @param savepointName Name of the savepoint.
* @param statementType set savepoint, rollback savepoint or release savepoint
*/
SavepointConstantAction(
String savepointName,
int savepointStatementType)
{
this.savepointName = savepointName;
this.savepointStatementType = savepointStatementType;
}
// OBJECT METHODS
public String toString()
{
if (savepointStatementType == 1)
return constructToString("SAVEPOINT ", savepointName + " ON ROLLBACK RETAIN CURSORS ON ROLLBACK RETAIN LOCKS");
else if (savepointStatementType == 2)
return constructToString("ROLLBACK WORK TO SAVEPOINT ", savepointName);
else
return constructToString("RELEASE TO SAVEPOINT ", savepointName);
}
// INTERFACE METHODS
/**
* This is the guts of the Execution-time logic for CREATE TABLE.
*
* @see ConstantAction#executeConstantAction
*
* @exception StandardException Thrown on failure
*/
public void executeConstantAction( Activation activation )
throws StandardException
{
LanguageConnectionContext lcc = activation.getLanguageConnectionContext();
//Bug 4507 - savepoint not allowed inside trigger
StatementContext stmtCtxt = lcc.getStatementContext();
if (stmtCtxt!= null && stmtCtxt.inTrigger())
throw StandardException.newException(SQLState.NO_SAVEPOINT_IN_TRIGGER);
if (savepointStatementType == 1) { //this is set savepoint
if (savepointName.startsWith("SYS")) //to enforce DB2 restriction which is savepoint name can't start with SYS
throw StandardException.newException(SQLState.INVALID_SCHEMA_SYS, "SYS");
lcc.languageSetSavePoint(savepointName, savepointName);
} else if (savepointStatementType == 2) { //this is rollback savepoint
lcc.internalRollbackToSavepoint(savepointName,true, savepointName);
} else { //this is release savepoint
lcc.releaseSavePoint(savepointName, savepointName);
}
}
}