summaryrefslogtreecommitdiffstats
path: root/src/sql/drivers/mysql/qsql_mysql.cpp
blob: 6652d212c2889aa0f76017789502ecf32c29c1a6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtSql module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qsql_mysql_p.h"

#include <qcoreapplication.h>
#include <qvariant.h>
#include <qdatetime.h>
#include <qsqlerror.h>
#include <qsqlfield.h>
#include <qsqlindex.h>
#include <qsqlquery.h>
#include <qsqlrecord.h>
#include <qstringlist.h>
#include <qtextcodec.h>
#include <qvector.h>
#include <qfile.h>
#include <qdebug.h>
#include <QtSql/private/qsqldriver_p.h>
#include <QtSql/private/qsqlresult_p.h>

#ifdef Q_OS_WIN32
// comment the next line out if you want to use MySQL/embedded on Win32 systems.
// note that it will crash if you don't statically link to the mysql/e library!
# define Q_NO_MYSQL_EMBEDDED
#endif

Q_DECLARE_METATYPE(MYSQL_RES*)
Q_DECLARE_METATYPE(MYSQL*)

#if MYSQL_VERSION_ID >= 40108
Q_DECLARE_METATYPE(MYSQL_STMT*)
#endif

#if MYSQL_VERSION_ID >= 40100
#  define Q_CLIENT_MULTI_STATEMENTS CLIENT_MULTI_STATEMENTS
#else
#  define Q_CLIENT_MULTI_STATEMENTS 0
#endif

QT_BEGIN_NAMESPACE

class QMYSQLDriverPrivate : public QSqlDriverPrivate
{
    Q_DECLARE_PUBLIC(QMYSQLDriver)

public:
    QMYSQLDriverPrivate() : QSqlDriverPrivate(), mysql(0),
#ifndef QT_NO_TEXTCODEC
        tc(QTextCodec::codecForLocale()),
#else
        tc(0),
#endif
        preparedQuerysEnabled(false) { dbmsType = QSqlDriver::MySqlServer; }
    MYSQL *mysql;
    QTextCodec *tc;

    bool preparedQuerysEnabled;
};

static inline QString toUnicode(QTextCodec *tc, const char *str)
{
#ifdef QT_NO_TEXTCODEC
    Q_UNUSED(tc);
    return QString::fromLatin1(str);
#else
    return tc->toUnicode(str);
#endif
}

static inline QString toUnicode(QTextCodec *tc, const char *str, int length)
{
#ifdef QT_NO_TEXTCODEC
    Q_UNUSED(tc);
    return QString::fromLatin1(str, length);
#else
    return tc->toUnicode(str, length);
#endif
}

static inline QByteArray fromUnicode(QTextCodec *tc, const QString &str)
{
#ifdef QT_NO_TEXTCODEC
    Q_UNUSED(tc);
    return str.toLatin1();
#else
    return tc->fromUnicode(str);
#endif
}

static inline QVariant qDateFromString(const QString &val)
{
#ifdef QT_NO_DATESTRING
    Q_UNUSED(val);
    return QVariant(val);
#else
    if (val.isEmpty())
        return QVariant(QDate());
    return QVariant(QDate::fromString(val, Qt::ISODate));
#endif
}

static inline QVariant qTimeFromString(const QString &val)
{
#ifdef QT_NO_DATESTRING
    Q_UNUSED(val);
    return QVariant(val);
#else
    if (val.isEmpty())
        return QVariant(QTime());
    return QVariant(QTime::fromString(val, Qt::ISODate));
#endif
}

static inline QVariant qDateTimeFromString(QString &val)
{
#ifdef QT_NO_DATESTRING
    Q_UNUSED(val);
    return QVariant(val);
#else
    if (val.isEmpty())
        return QVariant(QDateTime());
    if (val.length() == 14)
        // TIMESTAMPS have the format yyyyMMddhhmmss
        val.insert(4, QLatin1Char('-')).insert(7, QLatin1Char('-')).insert(10,
                    QLatin1Char('T')).insert(13, QLatin1Char(':')).insert(16, QLatin1Char(':'));
    return QVariant(QDateTime::fromString(val, Qt::ISODate));
#endif
}

class QMYSQLResultPrivate;

class QMYSQLResult : public QSqlResult
{
    Q_DECLARE_PRIVATE(QMYSQLResult)
    friend class QMYSQLDriver;

public:
    explicit QMYSQLResult(const QMYSQLDriver *db);
    ~QMYSQLResult();

    QVariant handle() const Q_DECL_OVERRIDE;
protected:
    void cleanup();
    bool fetch(int i) Q_DECL_OVERRIDE;
    bool fetchNext() Q_DECL_OVERRIDE;
    bool fetchLast() Q_DECL_OVERRIDE;
    bool fetchFirst() Q_DECL_OVERRIDE;
    QVariant data(int field) Q_DECL_OVERRIDE;
    bool isNull(int field) Q_DECL_OVERRIDE;
    bool reset (const QString& query) Q_DECL_OVERRIDE;
    int size() Q_DECL_OVERRIDE;
    int numRowsAffected() Q_DECL_OVERRIDE;
    QVariant lastInsertId() const Q_DECL_OVERRIDE;
    QSqlRecord record() const Q_DECL_OVERRIDE;
    void virtual_hook(int id, void *data) Q_DECL_OVERRIDE;
    bool nextResult() Q_DECL_OVERRIDE;

#if MYSQL_VERSION_ID >= 40108
    bool prepare(const QString &stmt) Q_DECL_OVERRIDE;
    bool exec() Q_DECL_OVERRIDE;
#endif
};

class QMYSQLResultPrivate: public QSqlResultPrivate
{
    Q_DECLARE_PUBLIC(QMYSQLResult)

public:
    Q_DECLARE_SQLDRIVER_PRIVATE(QMYSQLDriver)

    QMYSQLResultPrivate(QMYSQLResult *q, const QMYSQLDriver *drv)
        : QSqlResultPrivate(q, drv),
          result(0),
          rowsAffected(0),
          hasBlobs(false)
#if MYSQL_VERSION_ID >= 40108
        , stmt(0), meta(0), inBinds(0), outBinds(0)
#endif
        , preparedQuery(false)
        { }

    MYSQL_RES *result;
    MYSQL_ROW row;

    int rowsAffected;

    bool bindInValues();
    void bindBlobs();

    bool hasBlobs;
    struct QMyField
    {
        QMyField()
            : outField(0), nullIndicator(false), bufLength(0ul),
              myField(0), type(QVariant::Invalid)
        {}
        char *outField;
        my_bool nullIndicator;
        ulong bufLength;
        MYSQL_FIELD *myField;
        QVariant::Type type;
    };

    QVector<QMyField> fields;

#if MYSQL_VERSION_ID >= 40108
    MYSQL_STMT* stmt;
    MYSQL_RES* meta;

    MYSQL_BIND *inBinds;
    MYSQL_BIND *outBinds;
#endif

    bool preparedQuery;
};

#ifndef QT_NO_TEXTCODEC
static QTextCodec* codec(MYSQL* mysql)
{
#if MYSQL_VERSION_ID >= 32321
    QTextCodec* heuristicCodec = QTextCodec::codecForName(mysql_character_set_name(mysql));
    if (heuristicCodec)
        return heuristicCodec;
#endif
    return QTextCodec::codecForLocale();
}
#endif // QT_NO_TEXTCODEC

static QSqlError qMakeError(const QString& err, QSqlError::ErrorType type,
                            const QMYSQLDriverPrivate* p)
{
    const char *cerr = p->mysql ? mysql_error(p->mysql) : 0;
    return QSqlError(QLatin1String("QMYSQL: ") + err,
                     p->tc ? toUnicode(p->tc, cerr) : QString::fromLatin1(cerr),
                     type, mysql_errno(p->mysql));
}


static QVariant::Type qDecodeMYSQLType(int mysqltype, uint flags)
{
    QVariant::Type type;
    switch (mysqltype) {
    case FIELD_TYPE_TINY :
        type = static_cast<QVariant::Type>((flags & UNSIGNED_FLAG) ? QMetaType::UChar : QMetaType::Char);
        break;
    case FIELD_TYPE_SHORT :
        type = static_cast<QVariant::Type>((flags & UNSIGNED_FLAG) ? QMetaType::UShort : QMetaType::Short);
        break;
    case FIELD_TYPE_LONG :
    case FIELD_TYPE_INT24 :
        type = (flags & UNSIGNED_FLAG) ? QVariant::UInt : QVariant::Int;
        break;
    case FIELD_TYPE_YEAR :
        type = QVariant::Int;
        break;
    case FIELD_TYPE_LONGLONG :
        type = (flags & UNSIGNED_FLAG) ? QVariant::ULongLong : QVariant::LongLong;
        break;
    case FIELD_TYPE_FLOAT :
    case FIELD_TYPE_DOUBLE :
    case FIELD_TYPE_DECIMAL :
#if defined(FIELD_TYPE_NEWDECIMAL)
    case FIELD_TYPE_NEWDECIMAL:
#endif
        type = QVariant::Double;
        break;
    case FIELD_TYPE_DATE :
        type = QVariant::Date;
        break;
    case FIELD_TYPE_TIME :
        type = QVariant::Time;
        break;
    case FIELD_TYPE_DATETIME :
    case FIELD_TYPE_TIMESTAMP :
        type = QVariant::DateTime;
        break;
    case FIELD_TYPE_STRING :
    case FIELD_TYPE_VAR_STRING :
    case FIELD_TYPE_BLOB :
    case FIELD_TYPE_TINY_BLOB :
    case FIELD_TYPE_MEDIUM_BLOB :
    case FIELD_TYPE_LONG_BLOB :
        type = (flags & BINARY_FLAG) ? QVariant::ByteArray : QVariant::String;
        break;
    default:
    case FIELD_TYPE_ENUM :
    case FIELD_TYPE_SET :
        type = QVariant::String;
        break;
    }
    return type;
}

static QSqlField qToField(MYSQL_FIELD *field, QTextCodec *tc)
{
    QSqlField f(toUnicode(tc, field->name),
                qDecodeMYSQLType(int(field->type), field->flags));
    f.setRequired(IS_NOT_NULL(field->flags));
    f.setLength(field->length);
    f.setPrecision(field->decimals);
    f.setSqlType(field->type);
    f.setAutoValue(field->flags & AUTO_INCREMENT_FLAG);
    return f;
}

#if MYSQL_VERSION_ID >= 40108

static QSqlError qMakeStmtError(const QString& err, QSqlError::ErrorType type,
                            MYSQL_STMT* stmt)
{
    const char *cerr = mysql_stmt_error(stmt);
    return QSqlError(QLatin1String("QMYSQL3: ") + err,
                     QString::fromLatin1(cerr),
                     type, mysql_stmt_errno(stmt));
}

static bool qIsBlob(int t)
{
    return t == MYSQL_TYPE_TINY_BLOB
           || t == MYSQL_TYPE_BLOB
           || t == MYSQL_TYPE_MEDIUM_BLOB
           || t == MYSQL_TYPE_LONG_BLOB;
}

static bool qIsInteger(int t)
{
    return t == QMetaType::Char || t == QMetaType::UChar
        || t == QMetaType::Short || t == QMetaType::UShort
        || t == QMetaType::Int || t == QMetaType::UInt
        || t == QMetaType::LongLong || t == QMetaType::ULongLong;
}

void QMYSQLResultPrivate::bindBlobs()
{
    int i;
    MYSQL_FIELD *fieldInfo;
    MYSQL_BIND *bind;

    for(i = 0; i < fields.count(); ++i) {
        fieldInfo = fields.at(i).myField;
        if (qIsBlob(inBinds[i].buffer_type) && meta && fieldInfo) {
            bind = &inBinds[i];
            bind->buffer_length = fieldInfo->max_length;
            delete[] static_cast<char*>(bind->buffer);
            bind->buffer = new char[fieldInfo->max_length];
            fields[i].outField = static_cast<char*>(bind->buffer);
        }
    }
}

bool QMYSQLResultPrivate::bindInValues()
{
    MYSQL_BIND *bind;
    char *field;
    int i = 0;

    if (!meta)
        meta = mysql_stmt_result_metadata(stmt);
    if (!meta)
        return false;

    fields.resize(mysql_num_fields(meta));

    inBinds = new MYSQL_BIND[fields.size()];
    memset(inBinds, 0, fields.size() * sizeof(MYSQL_BIND));

    MYSQL_FIELD *fieldInfo;

    while((fieldInfo = mysql_fetch_field(meta))) {
        QMyField &f = fields[i];
        f.myField = fieldInfo;

        f.type = qDecodeMYSQLType(fieldInfo->type, fieldInfo->flags);
        if (qIsBlob(fieldInfo->type)) {
            // the size of a blob-field is available as soon as we call
            // mysql_stmt_store_result()
            // after mysql_stmt_exec() in QMYSQLResult::exec()
            fieldInfo->length = 0;
            hasBlobs = true;
        } else if (qIsInteger(f.type)) {
            fieldInfo->length = 8;
        } else {
            fieldInfo->type = MYSQL_TYPE_STRING;
        }
        bind = &inBinds[i];
        field = new char[fieldInfo->length + 1];
        memset(field, 0, fieldInfo->length + 1);

        bind->buffer_type = fieldInfo->type;
        bind->buffer = field;
        bind->buffer_length = f.bufLength = fieldInfo->length + 1;
        bind->is_null = &f.nullIndicator;
        bind->length = &f.bufLength;
        bind->is_unsigned = fieldInfo->flags & UNSIGNED_FLAG ? 1 : 0;
        f.outField=field;

        ++i;
    }
    return true;
}
#endif

QMYSQLResult::QMYSQLResult(const QMYSQLDriver* db)
    : QSqlResult(*new QMYSQLResultPrivate(this, db))
{
}

QMYSQLResult::~QMYSQLResult()
{
    cleanup();
}

QVariant QMYSQLResult::handle() const
{
    Q_D(const QMYSQLResult);
#if MYSQL_VERSION_ID >= 40108
    if(d->preparedQuery)
        return d->meta ? QVariant::fromValue(d->meta) : QVariant::fromValue(d->stmt);
    else
#endif
        return QVariant::fromValue(d->result);
}

void QMYSQLResult::cleanup()
{
    Q_D(QMYSQLResult);
    if (d->result)
        mysql_free_result(d->result);

// must iterate trough leftover result sets from multi-selects or stored procedures
// if this isn't done subsequent queries will fail with "Commands out of sync"
#if MYSQL_VERSION_ID >= 40100
    while (driver() && d->drv_d_func()->mysql && mysql_next_result(d->drv_d_func()->mysql) == 0) {
        MYSQL_RES *res = mysql_store_result(d->drv_d_func()->mysql);
        if (res)
            mysql_free_result(res);
    }
#endif

#if MYSQL_VERSION_ID >= 40108
    if (d->stmt) {
        if (mysql_stmt_close(d->stmt))
            qWarning("QMYSQLResult::cleanup: unable to free statement handle");
        d->stmt = 0;
    }

    if (d->meta) {
        mysql_free_result(d->meta);
        d->meta = 0;
    }

    int i;
    for (i = 0; i < d->fields.count(); ++i)
        delete[] d->fields[i].outField;

    if (d->outBinds) {
        delete[] d->outBinds;
        d->outBinds = 0;
    }

    if (d->inBinds) {
        delete[] d->inBinds;
        d->inBinds = 0;
    }
#endif

    d->hasBlobs = false;
    d->fields.clear();
    d->result = NULL;
    d->row = NULL;
    setAt(-1);
    setActive(false);
}

bool QMYSQLResult::fetch(int i)
{
    Q_D(QMYSQLResult);
    if (!driver())
        return false;
    if (isForwardOnly()) { // fake a forward seek
        if (at() < i) {
            int x = i - at();
            while (--x && fetchNext()) {};
            return fetchNext();
        } else {
            return false;
        }
    }
    if (at() == i)
        return true;
    if (d->preparedQuery) {
#if MYSQL_VERSION_ID >= 40108
        mysql_stmt_data_seek(d->stmt, i);

        int nRC = mysql_stmt_fetch(d->stmt);
        if (nRC) {
#ifdef MYSQL_DATA_TRUNCATED
            if (nRC == 1 || nRC == MYSQL_DATA_TRUNCATED)
#else
            if (nRC == 1)
#endif
                setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
                         "Unable to fetch data"), QSqlError::StatementError, d->stmt));
            return false;
        }
#else
        return false;
#endif
    } else {
        mysql_data_seek(d->result, i);
        d->row = mysql_fetch_row(d->result);
        if (!d->row)
            return false;
    }

    setAt(i);
    return true;
}

bool QMYSQLResult::fetchNext()
{
    Q_D(QMYSQLResult);
    if (!driver())
        return false;
    if (d->preparedQuery) {
#if MYSQL_VERSION_ID >= 40108
        int nRC = mysql_stmt_fetch(d->stmt);
        if (nRC) {
#ifdef MYSQL_DATA_TRUNCATED
            if (nRC == 1 || nRC == MYSQL_DATA_TRUNCATED)
#else
            if (nRC == 1)
#endif // MYSQL_DATA_TRUNCATED
                setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
                                    "Unable to fetch data"), QSqlError::StatementError, d->stmt));
            return false;
        }
#else
        return false;
#endif
    } else {
        d->row = mysql_fetch_row(d->result);
        if (!d->row)
            return false;
    }
    setAt(at() + 1);
    return true;
}

bool QMYSQLResult::fetchLast()
{
    Q_D(QMYSQLResult);
    if (!driver())
        return false;
    if (isForwardOnly()) { // fake this since MySQL can't seek on forward only queries
        bool success = fetchNext(); // did we move at all?
        while (fetchNext()) {};
        return success;
    }

    my_ulonglong numRows;
    if (d->preparedQuery) {
#if MYSQL_VERSION_ID >= 40108
        numRows = mysql_stmt_num_rows(d->stmt);
#else
        numRows = 0;
#endif
    } else {
        numRows = mysql_num_rows(d->result);
    }
    if (at() == int(numRows))
        return true;
    if (!numRows)
        return false;
    return fetch(numRows - 1);
}

bool QMYSQLResult::fetchFirst()
{
    if (at() == 0)
        return true;

    if (isForwardOnly())
        return (at() == QSql::BeforeFirstRow) ? fetchNext() : false;
    return fetch(0);
}

QVariant QMYSQLResult::data(int field)
{
    Q_D(QMYSQLResult);
    if (!isSelect() || field >= d->fields.count()) {
        qWarning("QMYSQLResult::data: column %d out of range", field);
        return QVariant();
    }

    if (!driver())
        return QVariant();

    int fieldLength = 0;
    const QMYSQLResultPrivate::QMyField &f = d->fields.at(field);
    QString val;
    if (d->preparedQuery) {
        if (f.nullIndicator)
            return QVariant(f.type);

        if (qIsInteger(f.type)) {
            QVariant variant(f.type, f.outField);
            // we never want to return char variants here, see QTBUG-53397
            if (static_cast<int>(f.type) == QMetaType::UChar)
                return variant.toUInt();
            else if (static_cast<int>(f.type) == QMetaType::Char)
                return variant.toInt();
            return variant;
        }

        if (f.type != QVariant::ByteArray)
            val = toUnicode(d->drv_d_func()->tc, f.outField, f.bufLength);
    } else {
        if (d->row[field] == NULL) {
            // NULL value
            return QVariant(f.type);
        }

        fieldLength = mysql_fetch_lengths(d->result)[field];

        if (f.type != QVariant::ByteArray)
            val = toUnicode(d->drv_d_func()->tc, d->row[field], fieldLength);
    }

    switch (static_cast<int>(f.type)) {
    case QVariant::LongLong:
        return QVariant(val.toLongLong());
    case QVariant::ULongLong:
        return QVariant(val.toULongLong());
    case QMetaType::Char:
    case QMetaType::Short:
    case QVariant::Int:
        return QVariant(val.toInt());
    case QMetaType::UChar:
    case QMetaType::UShort:
    case QVariant::UInt:
        return QVariant(val.toUInt());
    case QVariant::Double: {
        QVariant v;
        bool ok=false;
        double dbl = val.toDouble(&ok);
        switch(numericalPrecisionPolicy()) {
            case QSql::LowPrecisionInt32:
                v=QVariant(dbl).toInt();
                break;
            case QSql::LowPrecisionInt64:
                v = QVariant(dbl).toLongLong();
                break;
            case QSql::LowPrecisionDouble:
                v = QVariant(dbl);
                break;
            case QSql::HighPrecision:
            default:
                v = val;
                ok = true;
                break;
        }
        if(ok)
            return v;
        else
            return QVariant();
    }
        return QVariant(val.toDouble());
    case QVariant::Date:
        return qDateFromString(val);
    case QVariant::Time:
        return qTimeFromString(val);
    case QVariant::DateTime:
        return qDateTimeFromString(val);
    case QVariant::ByteArray: {

        QByteArray ba;
        if (d->preparedQuery) {
            ba = QByteArray(f.outField, f.bufLength);
        } else {
            ba = QByteArray(d->row[field], fieldLength);
        }
        return QVariant(ba);
    }
    default:
    case QVariant::String:
        return QVariant(val);
    }
    qWarning("QMYSQLResult::data: unknown data type");
    return QVariant();
}

bool QMYSQLResult::isNull(int field)
{
   Q_D(const QMYSQLResult);
   if (field < 0 || field >= d->fields.count())
       return true;
   if (d->preparedQuery)
       return d->fields.at(field).nullIndicator;
   else
       return d->row[field] == NULL;
}

bool QMYSQLResult::reset (const QString& query)
{
    Q_D(QMYSQLResult);
    if (!driver() || !driver()->isOpen() || driver()->isOpenError())
        return false;

    d->preparedQuery = false;

    cleanup();

    const QByteArray encQuery(fromUnicode(d->drv_d_func()->tc, query));
    if (mysql_real_query(d->drv_d_func()->mysql, encQuery.data(), encQuery.length())) {
        setLastError(qMakeError(QCoreApplication::translate("QMYSQLResult", "Unable to execute query"),
                     QSqlError::StatementError, d->drv_d_func()));
        return false;
    }
    d->result = mysql_store_result(d->drv_d_func()->mysql);
    if (!d->result && mysql_field_count(d->drv_d_func()->mysql) > 0) {
        setLastError(qMakeError(QCoreApplication::translate("QMYSQLResult", "Unable to store result"),
                    QSqlError::StatementError, d->drv_d_func()));
        return false;
    }
    int numFields = mysql_field_count(d->drv_d_func()->mysql);
    setSelect(numFields != 0);
    d->fields.resize(numFields);
    d->rowsAffected = mysql_affected_rows(d->drv_d_func()->mysql);

    if (isSelect()) {
        for(int i = 0; i < numFields; i++) {
            MYSQL_FIELD* field = mysql_fetch_field_direct(d->result, i);
            d->fields[i].type = qDecodeMYSQLType(field->type, field->flags);
        }
        setAt(QSql::BeforeFirstRow);
    }
    setActive(true);
    return isActive();
}

int QMYSQLResult::size()
{
    Q_D(const QMYSQLResult);
    if (driver() && isSelect())
        if (d->preparedQuery)
#if MYSQL_VERSION_ID >= 40108
            return mysql_stmt_num_rows(d->stmt);
#else
            return -1;
#endif
        else
            return int(mysql_num_rows(d->result));
    else
        return -1;
}

int QMYSQLResult::numRowsAffected()
{
    Q_D(const QMYSQLResult);
    return d->rowsAffected;
}

QVariant QMYSQLResult::lastInsertId() const
{
    Q_D(const QMYSQLResult);
    if (!isActive() || !driver())
        return QVariant();

    if (d->preparedQuery) {
#if MYSQL_VERSION_ID >= 40108
        quint64 id = mysql_stmt_insert_id(d->stmt);
        if (id)
            return QVariant(id);
#endif
    } else {
        quint64 id = mysql_insert_id(d->drv_d_func()->mysql);
        if (id)
            return QVariant(id);
    }
    return QVariant();
}

QSqlRecord QMYSQLResult::record() const
{
    Q_D(const QMYSQLResult);
    QSqlRecord info;
    MYSQL_RES *res;
    if (!isActive() || !isSelect() || !driver())
        return info;

#if MYSQL_VERSION_ID >= 40108
    res = d->preparedQuery ? d->meta : d->result;
#else
    res = d->result;
#endif

    if (!mysql_errno(d->drv_d_func()->mysql)) {
        mysql_field_seek(res, 0);
        MYSQL_FIELD* field = mysql_fetch_field(res);
        while(field) {
            info.append(qToField(field, d->drv_d_func()->tc));
            field = mysql_fetch_field(res);
        }
    }
    mysql_field_seek(res, 0);
    return info;
}

bool QMYSQLResult::nextResult()
{
    Q_D(QMYSQLResult);
    if (!driver())
        return false;
#if MYSQL_VERSION_ID >= 40100
    setAt(-1);
    setActive(false);

    if (d->result && isSelect())
        mysql_free_result(d->result);
    d->result = 0;
    setSelect(false);

    for (int i = 0; i < d->fields.count(); ++i)
        delete[] d->fields[i].outField;
    d->fields.clear();

    int status = mysql_next_result(d->drv_d_func()->mysql);
    if (status > 0) {
        setLastError(qMakeError(QCoreApplication::translate("QMYSQLResult", "Unable to execute next query"),
                     QSqlError::StatementError, d->drv_d_func()));
        return false;
    } else if (status == -1) {
        return false;   // No more result sets
    }

    d->result = mysql_store_result(d->drv_d_func()->mysql);
    int numFields = mysql_field_count(d->drv_d_func()->mysql);
    if (!d->result && numFields > 0) {
        setLastError(qMakeError(QCoreApplication::translate("QMYSQLResult", "Unable to store next result"),
                     QSqlError::StatementError, d->drv_d_func()));
        return false;
    }

    setSelect(numFields > 0);
    d->fields.resize(numFields);
    d->rowsAffected = mysql_affected_rows(d->drv_d_func()->mysql);

    if (isSelect()) {
        for (int i = 0; i < numFields; i++) {
            MYSQL_FIELD* field = mysql_fetch_field_direct(d->result, i);
            d->fields[i].type = qDecodeMYSQLType(field->type, field->flags);
        }
    }

    setActive(true);
    return true;
#else
    return false;
#endif
}

void QMYSQLResult::virtual_hook(int id, void *data)
{
    QSqlResult::virtual_hook(id, data);
}


#if MYSQL_VERSION_ID >= 40108

static MYSQL_TIME *toMySqlDate(QDate date, QTime time, QVariant::Type type)
{
    Q_ASSERT(type == QVariant::Time || type == QVariant::Date
             || type == QVariant::DateTime);

    MYSQL_TIME *myTime = new MYSQL_TIME;
    memset(myTime, 0, sizeof(MYSQL_TIME));

    if (type == QVariant::Time || type == QVariant::DateTime) {
        myTime->hour = time.hour();
        myTime->minute = time.minute();
        myTime->second = time.second();
        myTime->second_part = time.msec() * 1000;
    }
    if (type == QVariant::Date || type == QVariant::DateTime) {
        myTime->year = date.year();
        myTime->month = date.month();
        myTime->day = date.day();
    }

    return myTime;
}

bool QMYSQLResult::prepare(const QString& query)
{
    Q_D(QMYSQLResult);
    if (!driver())
        return false;
#if MYSQL_VERSION_ID >= 40108
    cleanup();
    if (!d->drv_d_func()->preparedQuerysEnabled)
        return QSqlResult::prepare(query);

    int r;

    if (query.isEmpty())
        return false;

    if (!d->stmt)
        d->stmt = mysql_stmt_init(d->drv_d_func()->mysql);
    if (!d->stmt) {
        setLastError(qMakeError(QCoreApplication::translate("QMYSQLResult", "Unable to prepare statement"),
                     QSqlError::StatementError, d->drv_d_func()));
        return false;
    }

    const QByteArray encQuery(fromUnicode(d->drv_d_func()->tc, query));
    r = mysql_stmt_prepare(d->stmt, encQuery.constData(), encQuery.length());
    if (r != 0) {
        setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
                     "Unable to prepare statement"), QSqlError::StatementError, d->stmt));
        cleanup();
        return false;
    }

    if (mysql_stmt_param_count(d->stmt) > 0) {// allocate memory for outvalues
        d->outBinds = new MYSQL_BIND[mysql_stmt_param_count(d->stmt)];
    }

    setSelect(d->bindInValues());
    d->preparedQuery = true;
    return true;
#else
    return false;
#endif
}

bool QMYSQLResult::exec()
{
    Q_D(QMYSQLResult);
    if (!driver())
        return false;
    if (!d->preparedQuery)
        return QSqlResult::exec();
    if (!d->stmt)
        return false;

    int r = 0;
    MYSQL_BIND* currBind;
    QVector<MYSQL_TIME *> timeVector;
    QVector<QByteArray> stringVector;
    QVector<my_bool> nullVector;

    const QVector<QVariant> values = boundValues();

    r = mysql_stmt_reset(d->stmt);
    if (r != 0) {
        setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
                     "Unable to reset statement"), QSqlError::StatementError, d->stmt));
        return false;
    }

    if (mysql_stmt_param_count(d->stmt) > 0 &&
        mysql_stmt_param_count(d->stmt) == (uint)values.count()) {

        nullVector.resize(values.count());
        for (int i = 0; i < values.count(); ++i) {
            const QVariant &val = boundValues().at(i);
            void *data = const_cast<void *>(val.constData());

            currBind = &d->outBinds[i];

            nullVector[i] = static_cast<my_bool>(val.isNull());
            currBind->is_null = &nullVector[i];
            currBind->length = 0;
            currBind->is_unsigned = 0;

            switch (val.type()) {
                case QVariant::ByteArray:
                    currBind->buffer_type = MYSQL_TYPE_BLOB;
                    currBind->buffer = const_cast<char *>(val.toByteArray().constData());
                    currBind->buffer_length = val.toByteArray().size();
                    break;

                case QVariant::Time:
                case QVariant::Date:
                case QVariant::DateTime: {
                    MYSQL_TIME *myTime = toMySqlDate(val.toDate(), val.toTime(), val.type());
                    timeVector.append(myTime);

                    currBind->buffer = myTime;
                    switch(val.type()) {
                    case QVariant::Time:
                        currBind->buffer_type = MYSQL_TYPE_TIME;
                        myTime->time_type = MYSQL_TIMESTAMP_TIME;
                        break;
                    case QVariant::Date:
                        currBind->buffer_type = MYSQL_TYPE_DATE;
                        myTime->time_type = MYSQL_TIMESTAMP_DATE;
                        break;
                    case QVariant::DateTime:
                        currBind->buffer_type = MYSQL_TYPE_DATETIME;
                        myTime->time_type = MYSQL_TIMESTAMP_DATETIME;
                        break;
                    default:
                        break;
                    }
                    currBind->buffer_length = sizeof(MYSQL_TIME);
                    currBind->length = 0;
                    break; }
                case QVariant::UInt:
                case QVariant::Int:
                    currBind->buffer_type = MYSQL_TYPE_LONG;
                    currBind->buffer = data;
                    currBind->buffer_length = sizeof(int);
                    currBind->is_unsigned = (val.type() != QVariant::Int);
                break;
                case QVariant::Bool:
                    currBind->buffer_type = MYSQL_TYPE_TINY;
                    currBind->buffer = data;
                    currBind->buffer_length = sizeof(bool);
                    currBind->is_unsigned = false;
                    break;
                case QVariant::Double:
                    currBind->buffer_type = MYSQL_TYPE_DOUBLE;
                    currBind->buffer = data;
                    currBind->buffer_length = sizeof(double);
                    break;
                case QVariant::LongLong:
                case QVariant::ULongLong:
                    currBind->buffer_type = MYSQL_TYPE_LONGLONG;
                    currBind->buffer = data;
                    currBind->buffer_length = sizeof(qint64);
                    currBind->is_unsigned = (val.type() == QVariant::ULongLong);
                    break;
                case QVariant::String:
                default: {
                    QByteArray ba = fromUnicode(d->drv_d_func()->tc, val.toString());
                    stringVector.append(ba);
                    currBind->buffer_type = MYSQL_TYPE_STRING;
                    currBind->buffer = const_cast<char *>(ba.constData());
                    currBind->buffer_length = ba.length();
                    break; }
            }
        }

        r = mysql_stmt_bind_param(d->stmt, d->outBinds);
        if (r != 0) {
            setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
                         "Unable to bind value"), QSqlError::StatementError, d->stmt));
            qDeleteAll(timeVector);
            return false;
        }
    }
    r = mysql_stmt_execute(d->stmt);

    qDeleteAll(timeVector);

    if (r != 0) {
        setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
                     "Unable to execute statement"), QSqlError::StatementError, d->stmt));
        return false;
    }
    //if there is meta-data there is also data
    setSelect(d->meta);

    d->rowsAffected = mysql_stmt_affected_rows(d->stmt);

    if (isSelect()) {
        my_bool update_max_length = true;

        r = mysql_stmt_bind_result(d->stmt, d->inBinds);
        if (r != 0) {
            setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
                         "Unable to bind outvalues"), QSqlError::StatementError, d->stmt));
            return false;
        }
        if (d->hasBlobs)
            mysql_stmt_attr_set(d->stmt, STMT_ATTR_UPDATE_MAX_LENGTH, &update_max_length);

        r = mysql_stmt_store_result(d->stmt);
        if (r != 0) {
            setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
                         "Unable to store statement results"), QSqlError::StatementError, d->stmt));
            return false;
        }

        if (d->hasBlobs) {
            // mysql_stmt_store_result() with STMT_ATTR_UPDATE_MAX_LENGTH set to true crashes
            // when called without a preceding call to mysql_stmt_bind_result()
            // in versions < 4.1.8
            d->bindBlobs();
            r = mysql_stmt_bind_result(d->stmt, d->inBinds);
            if (r != 0) {
                setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
                             "Unable to bind outvalues"), QSqlError::StatementError, d->stmt));
                return false;
            }
        }
        setAt(QSql::BeforeFirstRow);
    }
    setActive(true);
    return true;
}
#endif
/////////////////////////////////////////////////////////

static int qMySqlConnectionCount = 0;
static bool qMySqlInitHandledByUser = false;

static void qLibraryInit()
{
#ifndef Q_NO_MYSQL_EMBEDDED
# if MYSQL_VERSION_ID >= 40000
    if (qMySqlInitHandledByUser || qMySqlConnectionCount > 1)
        return;

# if (MYSQL_VERSION_ID >= 40110 && MYSQL_VERSION_ID < 50000) || MYSQL_VERSION_ID >= 50003
    if (mysql_library_init(0, 0, 0)) {
# else
    if (mysql_server_init(0, 0, 0)) {
# endif
        qWarning("QMYSQLDriver::qServerInit: unable to start server.");
    }
# endif // MYSQL_VERSION_ID
#endif // Q_NO_MYSQL_EMBEDDED
}

static void qLibraryEnd()
{
#ifndef Q_NO_MYSQL_EMBEDDED
# if MYSQL_VERSION_ID > 40000
#  if (MYSQL_VERSION_ID >= 40110 && MYSQL_VERSION_ID < 50000) || MYSQL_VERSION_ID >= 50003
    mysql_library_end();
#  else
    mysql_server_end();
#  endif
# endif
#endif
}

QMYSQLDriver::QMYSQLDriver(QObject * parent)
    : QSqlDriver(*new QMYSQLDriverPrivate, parent)
{
    init();
    qLibraryInit();
}

/*!
    Create a driver instance with the open connection handle, \a con.
    The instance's parent (owner) is \a parent.
*/

QMYSQLDriver::QMYSQLDriver(MYSQL * con, QObject * parent)
    : QSqlDriver(*new QMYSQLDriverPrivate, parent)
{
    Q_D(QMYSQLDriver);
    init();
    if (con) {
        d->mysql = (MYSQL *) con;
#ifndef QT_NO_TEXTCODEC
        d->tc = codec(con);
#endif
        setOpen(true);
        setOpenError(false);
        if (qMySqlConnectionCount == 1)
            qMySqlInitHandledByUser = true;
    } else {
        qLibraryInit();
    }
}

void QMYSQLDriver::init()
{
    Q_D(QMYSQLDriver);
    d->mysql = 0;
    qMySqlConnectionCount++;
}

QMYSQLDriver::~QMYSQLDriver()
{
    qMySqlConnectionCount--;
    if (qMySqlConnectionCount == 0 && !qMySqlInitHandledByUser)
        qLibraryEnd();
}

bool QMYSQLDriver::hasFeature(DriverFeature f) const
{
    Q_D(const QMYSQLDriver);
    switch (f) {
    case Transactions:
// CLIENT_TRANSACTION should be defined in all recent mysql client libs > 3.23.34
#ifdef CLIENT_TRANSACTIONS
        if (d->mysql) {
            if ((d->mysql->server_capabilities & CLIENT_TRANSACTIONS) == CLIENT_TRANSACTIONS)
                return true;
        }
#endif
        return false;
    case NamedPlaceholders:
    case BatchOperations:
    case SimpleLocking:
    case EventNotifications:
    case FinishQuery:
    case CancelQuery:
        return false;
    case QuerySize:
    case BLOB:
    case LastInsertId:
    case Unicode:
    case LowPrecisionNumbers:
        return true;
    case PreparedQueries:
    case PositionalPlaceholders:
#if MYSQL_VERSION_ID >= 40108
        return d->preparedQuerysEnabled;
#else
        return false;
#endif
    case MultipleResultSets:
#if MYSQL_VERSION_ID >= 40100
        return true;
#else
        return false;
#endif
    }
    return false;
}

static void setOptionFlag(uint &optionFlags, const QString &opt)
{
    if (opt == QLatin1String("CLIENT_COMPRESS"))
        optionFlags |= CLIENT_COMPRESS;
    else if (opt == QLatin1String("CLIENT_FOUND_ROWS"))
        optionFlags |= CLIENT_FOUND_ROWS;
    else if (opt == QLatin1String("CLIENT_IGNORE_SPACE"))
        optionFlags |= CLIENT_IGNORE_SPACE;
    else if (opt == QLatin1String("CLIENT_INTERACTIVE"))
        optionFlags |= CLIENT_INTERACTIVE;
    else if (opt == QLatin1String("CLIENT_NO_SCHEMA"))
        optionFlags |= CLIENT_NO_SCHEMA;
    else if (opt == QLatin1String("CLIENT_ODBC"))
        optionFlags |= CLIENT_ODBC;
    else if (opt == QLatin1String("CLIENT_SSL"))
        qWarning("QMYSQLDriver: SSL_KEY, SSL_CERT and SSL_CA should be used instead of CLIENT_SSL.");
    else
        qWarning("QMYSQLDriver::open: Unknown connect option '%s'", opt.toLocal8Bit().constData());
}

bool QMYSQLDriver::open(const QString& db,
                         const QString& user,
                         const QString& password,
                         const QString& host,
                         int port,
                         const QString& connOpts)
{
    Q_D(QMYSQLDriver);
    if (isOpen())
        close();

    /* This is a hack to get MySQL's stored procedure support working.
       Since a stored procedure _may_ return multiple result sets,
       we have to enable CLIEN_MULTI_STATEMENTS here, otherwise _any_
       stored procedure call will fail.
    */
    unsigned int optionFlags = Q_CLIENT_MULTI_STATEMENTS;
    const QStringList opts(connOpts.split(QLatin1Char(';'), QString::SkipEmptyParts));
    QString unixSocket;
    QString sslCert;
    QString sslCA;
    QString sslKey;
    QString sslCAPath;
    QString sslCipher;
#if MYSQL_VERSION_ID >= 50000
    my_bool reconnect=false;
    uint connectTimeout = 0;
    uint readTimeout = 0;
    uint writeTimeout = 0;
#endif

    // extract the real options from the string
    for (int i = 0; i < opts.count(); ++i) {
        QString tmp(opts.at(i).simplified());
        int idx;
        if ((idx = tmp.indexOf(QLatin1Char('='))) != -1) {
            QString val = tmp.mid(idx + 1).simplified();
            QString opt = tmp.left(idx).simplified();
            if (opt == QLatin1String("UNIX_SOCKET"))
                unixSocket = val;
#if MYSQL_VERSION_ID >= 50000
            else if (opt == QLatin1String("MYSQL_OPT_RECONNECT")) {
                if (val == QLatin1String("TRUE") || val == QLatin1String("1") || val.isEmpty())
                    reconnect = true;
            } else if (opt == QLatin1String("MYSQL_OPT_CONNECT_TIMEOUT")) {
                connectTimeout = val.toInt();
            } else if (opt == QLatin1String("MYSQL_OPT_READ_TIMEOUT")) {
                readTimeout = val.toInt();
            } else if (opt == QLatin1String("MYSQL_OPT_WRITE_TIMEOUT")) {
                writeTimeout = val.toInt();
            }
#endif
            else if (opt == QLatin1String("SSL_KEY"))
                sslKey = val;
            else if (opt == QLatin1String("SSL_CERT"))
                sslCert = val;
            else if (opt == QLatin1String("SSL_CA"))
                sslCA = val;
            else if (opt == QLatin1String("SSL_CAPATH"))
                sslCAPath = val;
            else if (opt == QLatin1String("SSL_CIPHER"))
                sslCipher = val;
            else if (val == QLatin1String("TRUE") || val == QLatin1String("1"))
                setOptionFlag(optionFlags, tmp.left(idx).simplified());
            else
                qWarning("QMYSQLDriver::open: Illegal connect option value '%s'",
                         tmp.toLocal8Bit().constData());
        } else {
            setOptionFlag(optionFlags, tmp);
        }
    }

    if (!(d->mysql = mysql_init((MYSQL*) 0))) {
        setLastError(qMakeError(tr("Unable to allocate a MYSQL object"),
                     QSqlError::ConnectionError, d));
        setOpenError(true);
        return false;
    }

    if (!sslKey.isNull() || !sslCert.isNull() || !sslCA.isNull() ||
        !sslCAPath.isNull() || !sslCipher.isNull()) {
       mysql_ssl_set(d->mysql,
                        sslKey.isNull() ? static_cast<const char *>(0)
                                        : QFile::encodeName(sslKey).constData(),
                        sslCert.isNull() ? static_cast<const char *>(0)
                                         : QFile::encodeName(sslCert).constData(),
                        sslCA.isNull() ? static_cast<const char *>(0)
                                       : QFile::encodeName(sslCA).constData(),
                        sslCAPath.isNull() ? static_cast<const char *>(0)
                                           : QFile::encodeName(sslCAPath).constData(),
                        sslCipher.isNull() ? static_cast<const char *>(0)
                                           : sslCipher.toLocal8Bit().constData());
    }

#if MYSQL_VERSION_ID >= 50100
    if (connectTimeout != 0)
        mysql_options(d->mysql, MYSQL_OPT_CONNECT_TIMEOUT, &connectTimeout);
    if (readTimeout != 0)
        mysql_options(d->mysql, MYSQL_OPT_READ_TIMEOUT, &readTimeout);
    if (writeTimeout != 0)
        mysql_options(d->mysql, MYSQL_OPT_WRITE_TIMEOUT, &writeTimeout);
#endif
    MYSQL *mysql = mysql_real_connect(d->mysql,
                                      host.isNull() ? static_cast<const char *>(0)
                                                    : host.toLocal8Bit().constData(),
                                      user.isNull() ? static_cast<const char *>(0)
                                                    : user.toLocal8Bit().constData(),
                                      password.isNull() ? static_cast<const char *>(0)
                                                        : password.toLocal8Bit().constData(),
                                      db.isNull() ? static_cast<const char *>(0)
                                                  : db.toLocal8Bit().constData(),
                                      (port > -1) ? port : 0,
                                      unixSocket.isNull() ? static_cast<const char *>(0)
                                                          : unixSocket.toLocal8Bit().constData(),
                                      optionFlags);

    if (mysql == d->mysql) {
        if (!db.isEmpty() && mysql_select_db(d->mysql, db.toLocal8Bit().constData())) {
            setLastError(qMakeError(tr("Unable to open database '%1'").arg(db), QSqlError::ConnectionError, d));
            mysql_close(d->mysql);
            setOpenError(true);
            return false;
        }
#if MYSQL_VERSION_ID >= 50100
        if (reconnect)
            mysql_options(d->mysql, MYSQL_OPT_RECONNECT, &reconnect);
#endif
    } else {
        setLastError(qMakeError(tr("Unable to connect"),
                     QSqlError::ConnectionError, d));
        mysql_close(d->mysql);
        d->mysql = NULL;
        setOpenError(true);
        return false;
    }

#if (MYSQL_VERSION_ID >= 40113 && MYSQL_VERSION_ID < 50000) || MYSQL_VERSION_ID >= 50007
    // force the communication to be utf8
    mysql_set_character_set(d->mysql, "utf8");
#endif
#ifndef QT_NO_TEXTCODEC
    d->tc = codec(d->mysql);
#endif

#if MYSQL_VERSION_ID >= 40108
    d->preparedQuerysEnabled = mysql_get_client_version() >= 40108
                        && mysql_get_server_version(d->mysql) >= 40100;
#else
    d->preparedQuerysEnabled = false;
#endif

#ifndef QT_NO_THREAD
    mysql_thread_init();
#endif


    setOpen(true);
    setOpenError(false);
    return true;
}

void QMYSQLDriver::close()
{
    Q_D(QMYSQLDriver);
    if (isOpen()) {
#ifndef QT_NO_THREAD
        mysql_thread_end();
#endif
        mysql_close(d->mysql);
        d->mysql = NULL;
        setOpen(false);
        setOpenError(false);
    }
}

QSqlResult *QMYSQLDriver::createResult() const
{
    return new QMYSQLResult(this);
}

QStringList QMYSQLDriver::tables(QSql::TableType type) const
{
    Q_D(const QMYSQLDriver);
    QStringList tl;
#if MYSQL_VERSION_ID >= 40100
    if( mysql_get_server_version(d->mysql) < 50000)
    {
#endif
        if (!isOpen())
            return tl;
        if (!(type & QSql::Tables))
            return tl;

        MYSQL_RES* tableRes = mysql_list_tables(d->mysql, NULL);
        MYSQL_ROW row;
        int i = 0;
        while (tableRes) {
            mysql_data_seek(tableRes, i);
            row = mysql_fetch_row(tableRes);
            if (!row)
                break;
            tl.append(toUnicode(d->tc, row[0]));
            i++;
        }
        mysql_free_result(tableRes);
#if MYSQL_VERSION_ID >= 40100
    } else {
        QSqlQuery q(createResult());
        if(type & QSql::Tables) {
            QString sql = QLatin1String("select table_name from information_schema.tables where table_schema = '") + QLatin1String(d->mysql->db) + QLatin1String("' and table_type = 'BASE TABLE'");
            q.exec(sql);

            while(q.next())
                tl.append(q.value(0).toString());
        }
        if(type & QSql::Views) {
            QString sql = QLatin1String("select table_name from information_schema.tables where table_schema = '") + QLatin1String(d->mysql->db) + QLatin1String("' and table_type = 'VIEW'");
            q.exec(sql);

            while(q.next())
                tl.append(q.value(0).toString());
        }
    }
#endif
    return tl;
}

QSqlIndex QMYSQLDriver::primaryIndex(const QString& tablename) const
{
    QSqlIndex idx;
    if (!isOpen())
        return idx;

    QSqlQuery i(createResult());
    QString stmt(QLatin1String("show index from %1;"));
    QSqlRecord fil = record(tablename);
    i.exec(stmt.arg(tablename));
    while (i.isActive() && i.next()) {
        if (i.value(2).toString() == QLatin1String("PRIMARY")) {
            idx.append(fil.field(i.value(4).toString()));
            idx.setCursorName(i.value(0).toString());
            idx.setName(i.value(2).toString());
        }
    }

    return idx;
}

QSqlRecord QMYSQLDriver::record(const QString& tablename) const
{
    Q_D(const QMYSQLDriver);
    QString table=tablename;
    if(isIdentifierEscaped(table, QSqlDriver::TableName))
        table = stripDelimiters(table, QSqlDriver::TableName);

    QSqlRecord info;
    if (!isOpen())
        return info;
    MYSQL_RES* r = mysql_list_fields(d->mysql, table.toLocal8Bit().constData(), 0);
    if (!r) {
        return info;
    }
    MYSQL_FIELD* field;

    while ((field = mysql_fetch_field(r)))
        info.append(qToField(field, d->tc));
    mysql_free_result(r);
    return info;
}

QVariant QMYSQLDriver::handle() const
{
    Q_D(const QMYSQLDriver);
    return QVariant::fromValue(d->mysql);
}

bool QMYSQLDriver::beginTransaction()
{
    Q_D(QMYSQLDriver);
#ifndef CLIENT_TRANSACTIONS
    return false;
#endif
    if (!isOpen()) {
        qWarning("QMYSQLDriver::beginTransaction: Database not open");
        return false;
    }
    if (mysql_query(d->mysql, "BEGIN WORK")) {
        setLastError(qMakeError(tr("Unable to begin transaction"),
                                QSqlError::StatementError, d));
        return false;
    }
    return true;
}

bool QMYSQLDriver::commitTransaction()
{
    Q_D(QMYSQLDriver);
#ifndef CLIENT_TRANSACTIONS
    return false;
#endif
    if (!isOpen()) {
        qWarning("QMYSQLDriver::commitTransaction: Database not open");
        return false;
    }
    if (mysql_query(d->mysql, "COMMIT")) {
        setLastError(qMakeError(tr("Unable to commit transaction"),
                                QSqlError::StatementError, d));
        return false;
    }
    return true;
}

bool QMYSQLDriver::rollbackTransaction()
{
    Q_D(QMYSQLDriver);
#ifndef CLIENT_TRANSACTIONS
    return false;
#endif
    if (!isOpen()) {
        qWarning("QMYSQLDriver::rollbackTransaction: Database not open");
        return false;
    }
    if (mysql_query(d->mysql, "ROLLBACK")) {
        setLastError(qMakeError(tr("Unable to rollback transaction"),
                                QSqlError::StatementError, d));
        return false;
    }
    return true;
}

QString QMYSQLDriver::formatValue(const QSqlField &field, bool trimStrings) const
{
    Q_D(const QMYSQLDriver);
    QString r;
    if (field.isNull()) {
        r = QStringLiteral("NULL");
    } else {
        switch(field.type()) {
        case QVariant::Double:
            r = QString::number(field.value().toDouble(), 'g', field.precision());
            break;
        case QVariant::String:
            // Escape '\' characters
            r = QSqlDriver::formatValue(field, trimStrings);
            r.replace(QLatin1String("\\"), QLatin1String("\\\\"));
            break;
        case QVariant::ByteArray:
            if (isOpen()) {
                const QByteArray ba = field.value().toByteArray();
                // buffer has to be at least length*2+1 bytes
                char* buffer = new char[ba.size() * 2 + 1];
                int escapedSize = int(mysql_real_escape_string(d->mysql, buffer,
                                      ba.data(), ba.size()));
                r.reserve(escapedSize + 3);
                r.append(QLatin1Char('\'')).append(toUnicode(d->tc, buffer)).append(QLatin1Char('\''));
                delete[] buffer;
                break;
            } else {
                qWarning("QMYSQLDriver::formatValue: Database not open");
            }
            // fall through
        default:
            r = QSqlDriver::formatValue(field, trimStrings);
        }
    }
    return r;
}

QString QMYSQLDriver::escapeIdentifier(const QString &identifier, IdentifierType) const
{
    QString res = identifier;
    if(!identifier.isEmpty() && !identifier.startsWith(QLatin1Char('`')) && !identifier.endsWith(QLatin1Char('`')) ) {
        res.prepend(QLatin1Char('`')).append(QLatin1Char('`'));
        res.replace(QLatin1Char('.'), QLatin1String("`.`"));
    }
    return res;
}

bool QMYSQLDriver::isIdentifierEscaped(const QString &identifier, IdentifierType type) const
{
    Q_UNUSED(type);
    return identifier.size() > 2
        && identifier.startsWith(QLatin1Char('`')) //left delimited
        && identifier.endsWith(QLatin1Char('`')); //right delimited
}

QT_END_NAMESPACE