/* Copyright (c) 2001-2011, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.hsqldb;
import org.hsqldb.HsqlNameManager.HsqlName;
import org.hsqldb.error.Error;
import org.hsqldb.error.ErrorCode;
import org.hsqldb.lib.ArrayUtil;
import org.hsqldb.navigator.RowSetNavigatorData;
import org.hsqldb.navigator.RowSetNavigatorDataChange;
import org.hsqldb.persist.PersistentStore;
import org.hsqldb.result.Result;
import org.hsqldb.result.ResultConstants;
import org.hsqldb.types.Type;
/**
* Implementation of Statement for updating result rows.<p>
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.2
* @since 1.9.0
*/
public class StatementResultUpdate extends StatementDML {
int actionType;
Type[] types;
Result result;
StatementResultUpdate() {
super();
writeTableNames = new HsqlName[1];
setCompileTimestamp(Long.MAX_VALUE);
}
public String describe(Session session) {
return "";
}
public Result execute(Session session) {
Result result;
try {
result = getResult(session);
clearStructures(session);
} catch (Throwable t) {
clearStructures(session);
result = Result.newErrorResult(t, null);
}
return result;
}
Result getResult(Session session) {
checkAccessRights(session);
Object[] args = session.sessionContext.dynamicArguments;
Row row;
PersistentStore store = baseTable.getRowStore(session);
switch (actionType) {
case ResultConstants.UPDATE_CURSOR : {
row = getRow(session, args);
/**
* @todo - in 2PL mode isDeleted() always returns false.
* While write lock prevents delete by other transactions,
* same-transaction deletes are not caught
*/
if (row == null || row.isDeleted(session, store)) {
throw Error.error(ErrorCode.X_24521);
}
RowSetNavigatorDataChange list =
session.sessionContext.getRowSetDataChange();
Object[] data =
(Object[]) ArrayUtil.duplicateArray(row.getData());
boolean[] columnCheck = baseTable.getNewColumnCheckList();
for (int i = 0; i < baseColumnMap.length; i++) {
if (types[i] == Type.SQL_ALL_TYPES) {
continue;
}
data[baseColumnMap[i]] = args[i];
columnCheck[baseColumnMap[i]] = true;
}
int[] colMap = ArrayUtil.booleanArrayToIntIndexes(columnCheck);
list.addRow(session, row, data, baseTable.getColumnTypes(),
colMap);
list.endMainDataSet();
update(session, baseTable, list, null);
break;
}
case ResultConstants.DELETE_CURSOR : {
row = getRow(session, args);
if (row == null || row.isDeleted(session, store)) {
throw Error.error(ErrorCode.X_24521);
}
RowSetNavigatorDataChange list =
session.sessionContext.getRowSetDataChange();
list.addRow(row);
list.endMainDataSet();
delete(session, baseTable, list);
break;
}
case ResultConstants.INSERT_CURSOR : {
Object[] data = baseTable.getNewRowData(session);
for (int i = 0; i < baseColumnMap.length; i++) {
data[baseColumnMap[i]] = args[i];
}
return insertSingleRow(session, store, data);
}
}
return Result.updateOneResult;
}
Row getRow(Session session, Object[] args) {
int rowIdIndex = result.metaData.getColumnCount();
Long rowId = (Long) args[rowIdIndex];
PersistentStore store = baseTable.getRowStore(session);
Row row = null;
if (rowIdIndex + 2 == result.metaData.getExtendedColumnCount()) {
Object[] data =
((RowSetNavigatorData) result.getNavigator()).getData(
rowId.longValue());
if (data != null) {
row = (Row) data[rowIdIndex + 1];
}
} else {
int id = (int) rowId.longValue();
row = (Row) store.get(id, false);
}
this.result = null;
return row;
}
void setRowActionProperties(Result result, int action,
StatementQuery statement, Type[] types) {
QueryExpression qe = statement.queryExpression;
this.result = result;
this.actionType = action;
this.baseTable = qe.getBaseTable();
this.types = types;
this.baseColumnMap = qe.getBaseTableColumnMap();
this.writeTableNames[0] = baseTable.getName();
// used for statement logging - needs improvements to list only the updated values
this.sql = statement.getSQL();
this.parameterMetaData = qe.getMetaData();
}
void checkAccessRights(Session session) {
switch (type) {
case StatementTypes.CALL : {
break;
}
case StatementTypes.INSERT : {
session.getGrantee().checkInsert(targetTable,
insertCheckColumns);
break;
}
case StatementTypes.SELECT_CURSOR :
break;
case StatementTypes.DELETE_WHERE : {
session.getGrantee().checkDelete(targetTable);
break;
}
case StatementTypes.UPDATE_WHERE : {
session.getGrantee().checkUpdate(targetTable,
updateCheckColumns);
break;
}
case StatementTypes.MERGE : {
session.getGrantee().checkInsert(targetTable,
insertCheckColumns);
session.getGrantee().checkUpdate(targetTable,
updateCheckColumns);
break;
}
}
}
}