/* Copyright (c) 2001-2016, 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"
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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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.<p>
*
* @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;
}
}