1/*
2 * Copyright (C) 2007 Apple Inc. All rights reserved.
3 * Copyright (C) 2010 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1.  Redistributions of source code must retain the above copyright
10 *     notice, this list of conditions and the following disclaimer.
11 * 2.  Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
15 *     its contributors may be used to endorse or promote products derived
16 *     from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "config.h"
31#include "SQLStatementSync.h"
32
33#if ENABLE(SQL_DATABASE)
34
35#include "DatabaseSync.h"
36#include "SQLException.h"
37#include "SQLResultSet.h"
38#include "SQLValue.h"
39#include "SQLiteDatabase.h"
40#include "SQLiteStatement.h"
41#include <wtf/PassRefPtr.h>
42#include <wtf/RefPtr.h>
43
44namespace WebCore {
45
46SQLStatementSync::SQLStatementSync(const String& statement, const Vector<SQLValue>& arguments, int permissions)
47    : m_statement(statement)
48    , m_arguments(arguments)
49    , m_permissions(permissions)
50{
51    ASSERT(!m_statement.isEmpty());
52}
53
54PassRefPtr<SQLResultSet> SQLStatementSync::execute(DatabaseSync* db, ExceptionCode& ec)
55{
56    db->setAuthorizerPermissions(m_permissions);
57
58    SQLiteDatabase* database = &db->sqliteDatabase();
59
60    SQLiteStatement statement(*database, m_statement);
61    int result = statement.prepare();
62    if (result != SQLResultOk) {
63        ec = (result == SQLResultInterrupt ? SQLException::DATABASE_ERR : SQLException::SYNTAX_ERR);
64        db->setLastErrorMessage("could not prepare statement", result, database->lastErrorMsg());
65        return 0;
66    }
67
68    if (statement.bindParameterCount() != m_arguments.size()) {
69        ec = (db->isInterrupted()? SQLException::DATABASE_ERR : SQLException::SYNTAX_ERR);
70        db->setLastErrorMessage("number of '?'s in statement string does not match argument count");
71        return 0;
72    }
73
74    for (unsigned i = 0; i < m_arguments.size(); ++i) {
75        result = statement.bindValue(i + 1, m_arguments[i]);
76        if (result == SQLResultFull) {
77            ec = SQLException::QUOTA_ERR;
78            db->setLastErrorMessage("there was not enough remaining storage space");
79            return 0;
80        }
81
82        if (result != SQLResultOk) {
83            ec = SQLException::DATABASE_ERR;
84            db->setLastErrorMessage("could not bind value", result, database->lastErrorMsg());
85            return 0;
86        }
87    }
88
89    RefPtr<SQLResultSet> resultSet = SQLResultSet::create();
90
91    // Step so we can fetch the column names.
92    result = statement.step();
93    if (result == SQLResultRow) {
94        int columnCount = statement.columnCount();
95        SQLResultSetRowList* rows = resultSet->rows();
96
97        for (int i = 0; i < columnCount; i++)
98            rows->addColumn(statement.getColumnName(i));
99
100        do {
101            for (int i = 0; i < columnCount; i++)
102                rows->addResult(statement.getColumnValue(i));
103
104            result = statement.step();
105        } while (result == SQLResultRow);
106
107        if (result != SQLResultDone) {
108            ec = SQLException::DATABASE_ERR;
109            db->setLastErrorMessage("could not iterate results", result, database->lastErrorMsg());
110            return 0;
111        }
112    } else if (result == SQLResultDone) {
113        // Didn't find anything, or was an insert.
114        if (db->lastActionWasInsert())
115            resultSet->setInsertId(database->lastInsertRowID());
116    } else if (result == SQLResultFull) {
117        // Quota error, the delegate will be asked for more space and this statement might be re-run.
118        ec = SQLException::QUOTA_ERR;
119        db->setLastErrorMessage("there was not enough remaining storage space");
120        return 0;
121    } else if (result == SQLResultConstraint) {
122        ec = SQLException::CONSTRAINT_ERR;
123        db->setLastErrorMessage("statement failed due to a constraint failure");
124        return 0;
125    } else {
126        ec = SQLException::DATABASE_ERR;
127        db->setLastErrorMessage("could not execute statement", result, database->lastErrorMsg());
128        return 0;
129    }
130
131    resultSet->setRowsAffected(database->lastChanges());
132    return resultSet.release();
133}
134
135} // namespace WebCore
136
137#endif // ENABLE(SQL_DATABASE)
138