org.hsqldb.StatementQuery Maven / Gradle / Ivy
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package org.hsqldb;
import org.hsqldb.HsqlNameManager.HsqlName;
import org.hsqldb.ParserDQL.CompileContext;
import org.hsqldb.error.Error;
import org.hsqldb.error.ErrorCode;
import org.hsqldb.lib.OrderedHashSet;
import org.hsqldb.result.Result;
import org.hsqldb.result.ResultMetaData;
import org.hsqldb.result.ResultProperties;
/**
* Implementation of Statement for query expressions.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.3
* @since 1.9.0
*/
public class StatementQuery extends StatementDMQL {
public static final StatementQuery[] emptyArray = new StatementQuery[]{};
StatementQuery(Session session, QueryExpression queryExpression,
CompileContext compileContext) {
super(StatementTypes.SELECT_CURSOR, StatementTypes.X_SQL_DATA,
session.getCurrentSchemaHsqlName());
this.statementReturnType = StatementTypes.RETURN_RESULT;
this.queryExpression = queryExpression;
setDatabaseObjects(session, compileContext);
checkAccessRights(session);
}
Result getResult(Session session) {
Result result = queryExpression.getResult(session,
session.getMaxRows());
result.setStatement(this);
return result;
}
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,
"StatementQuery.getResultMetaData()");
}
}
void collectTableNamesForRead(OrderedHashSet set) {
queryExpression.getBaseTableNames(set);
for (int i = 0; i < subqueries.length; i++) {
if (subqueries[i].queryExpression != null) {
subqueries[i].queryExpression.getBaseTableNames(set);
}
}
for (int i = 0; i < routines.length; i++) {
set.addAll(routines[i].getTableNamesForRead());
}
}
void collectTableNamesForWrite(OrderedHashSet set) {
if (queryExpression.isUpdatable) {
queryExpression.getBaseTableNames(set);
}
}
public int getResultProperties() {
return queryExpression.isUpdatable
? ResultProperties.updatablePropsValue
: ResultProperties.defaultPropsValue;
}
public void setCursorName(HsqlName name) {
cursorName = name;
}
public HsqlName getCursorName() {
return cursorName;
}
}