/* Copyright (c) 2001-2009, The HSQL Development Group
* All rights reserved.
*
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* modification, are permitted provided that the following conditions are met:
*
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* 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.
*
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* 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"
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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package org.hsqldb_voltpatches;
import org.hsqldb_voltpatches.HsqlNameManager.HsqlName;
import org.hsqldb_voltpatches.ParserDQL.CompileContext;
import org.hsqldb_voltpatches.lib.OrderedHashSet;
import org.hsqldb_voltpatches.result.Result;
import org.hsqldb_voltpatches.result.ResultMetaData;
/**
* Implementation of Statement for query expressions.<p>
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 1.9.0
* @since 1.9.0
*/
public class StatementQuery extends StatementDMQL {
StatementQuery(Session session, QueryExpression queryExpression,
CompileContext compileContext) {
super(StatementTypes.SELECT_CURSOR, StatementTypes.X_SQL_DATA,
session.currentSchema);
this.queryExpression = queryExpression;
setDatabseObjects(compileContext);
checkAccessRights(session);
}
StatementQuery(Session session, QueryExpression queryExpression,
CompileContext compileContext, HsqlName[] targets) {
super(StatementTypes.SELECT_SINGLE, StatementTypes.X_SQL_DATA,
session.currentSchema);
this.queryExpression = queryExpression;
setDatabseObjects(compileContext);
checkAccessRights(session);
}
@Override
Result getResult(Session session) {
Result result = queryExpression.getResult(session,
session.getMaxRows());
result.setStatement(this);
return result;
}
@Override
public ResultMetaData getResultMetaData() {
switch (type) {
case StatementTypes.SELECT_CURSOR :
return queryExpression.getMetaData();
case StatementTypes.SELECT_SINGLE :
return queryExpression.getMetaData();
default :
throw Error.runtimeError(
ErrorCode.U_S0500,
"CompiledStatement.getResultMetaData()");
}
}
@Override
void getTableNamesForRead(OrderedHashSet set) {
queryExpression.getBaseTableNames(set);
for (int i = 0; i < subqueries.length; i++) {
if (subqueries[i].queryExpression != null) {
subqueries[i].queryExpression.getBaseTableNames(set);
}
}
}
@Override
void getTableNamesForWrite(OrderedHashSet set) {}
/************************* Volt DB Extensions *************************/
/**
* VoltDB added method to get a non-catalog-dependent
* representation of this HSQLDB object.
* @param session The current Session object may be needed to resolve
* some names.
* @return XML, correctly indented, representing this object.
* @throws org.hsqldb_voltpatches.HSQLInterface.HSQLParseException
*/
@Override
VoltXMLElement voltGetStatementXML(Session session)
throws org.hsqldb_voltpatches.HSQLInterface.HSQLParseException
{
return voltGetXMLExpression(queryExpression, parameters, session);
}
/**********************************************************************/
}