summaryrefslogtreecommitdiffstats
path: root/src/svnqt/cache/sqlite3/qsql_sqlite3.cpp
blob: 9badbef4310d8c5088155debf1fa6ce90e3bbfa9 (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
/****************************************************************************
**
** Implementation of SQLite driver classes.
**
** Copyright (C) 1992-2003 Trolltech AS. All rights reserved.
**
** This file is part of the sql module of the TQt GUI Toolkit.
** EDITIONS: FREE, ENTERPRISE
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qsql_sqlite3.h"

#include <tqdatetime.h>
#include <tqvaluevector.h>
#include <tqregexp.h>
#include <tqfile.h>
#include <sqlite3.h>

#  include <tqptrvector.h>
#  if !defined TQ_WS_WIN32
#    include <unistd.h>
#  endif

typedef struct sqlite3_stmt sqlite3_stmt;

#define TQSQLITE3_DRIVER_NAME "QSQLITE3"

static TQVariant::Type qSqliteType(int tp)
{
    switch (tp) {
    case SQLITE_INTEGER:
        return TQVariant::Int;
    case SQLITE_FLOAT:
        return TQVariant::Double;
    case SQLITE_BLOB:
        return TQVariant::ByteArray;
    case SQLITE_TEXT:
    default:
        return TQVariant::String;
    }
}

static TQSqlError qMakeError(sqlite3 *access, const TQString &descr, TQSqlError::Type type,
                            int errorCode = -1)
{
    return TQSqlError(descr,
                     TQString::fromUtf8(sqlite3_errmsg(access)),
                     type, errorCode);
}

class TQSQLite3DriverPrivate
{
public:
    TQSQLite3DriverPrivate();
    sqlite3 *access;
    bool utf8;
};

TQSQLite3DriverPrivate::TQSQLite3DriverPrivate() : access(0)
{
    utf8 = true;
}

class TQSQLite3ResultPrivate
{
public:
    TQSQLite3ResultPrivate(TQSQLite3Result *res);
    void cleanup();
    bool fetchNext(TQSqlCachedResult::ValueCache &values, int idx, bool initialFetch);
    bool isSelect();
    // initializes the recordInfo and the cache
    void initColumns();
    void finalize();

    TQSQLite3Result* q;
    sqlite3 *access;

    sqlite3_stmt *stmt;

    uint skippedStatus: 1; // the status of the fetchNext() that's skipped
    uint skipRow: 1; // skip the next fetchNext()?
    uint utf8: 1;
    TQSqlRecord rInf;
};

static const uint initial_cache_size = 128;

TQSQLite3ResultPrivate::TQSQLite3ResultPrivate(TQSQLite3Result* res) : q(res), access(0),
    stmt(0), skippedStatus(false), skipRow(false), utf8(false)
{
}

void TQSQLite3ResultPrivate::cleanup()
{
    finalize();
    rInf.clear();
    skippedStatus = false;
    skipRow = false;
    q->setAt(TQSql::BeforeFirst);
    q->setActive(false);
    q->cleanup();
}

void TQSQLite3ResultPrivate::finalize()
{
    if (!stmt)
        return;

    sqlite3_finalize(stmt);
    stmt = 0;
}

// called on first fetch
void TQSQLite3ResultPrivate::initColumns()
{
    rInf.clear();

    int nCols = sqlite3_column_count(stmt);
    if (nCols <= 0)
        return;

    q->init(nCols);

    for (int i = 0; i < nCols; ++i) {
        TQString colName = TQString::fromUtf8(sqlite3_column_name(stmt, i));

        int dotIdx = colName.findRev('.');
        rInf.append(TQSqlField(colName.mid(dotIdx == -1 ? 0 : dotIdx + 1),
                qSqliteType(sqlite3_column_type(stmt, i))));
    }
}

bool TQSQLite3ResultPrivate::fetchNext(TQSqlCachedResult::ValueCache &values, int idx, bool initialFetch)
{
    int res;
    unsigned int i;

    if (skipRow) {
        // already fetched
        Q_ASSERT(!initialFetch);
        skipRow = false;
        return skippedStatus;
    }
    skipRow = initialFetch;

    if (!stmt)
        return false;

    // keep trying while busy, wish I could implement this better.
    while ((res = sqlite3_step(stmt)) == SQLITE_BUSY) {
        // sleep instead requesting result again immidiately.
#if defined TQ_OS_WIN
        Sleep(1000);
#else
        sleep(1);
#endif
    }

    switch(res) {
    case SQLITE_ROW:
        // check to see if should fill out columns
        if (rInf.isEmpty())
            // must be first call.
            initColumns();
        if (idx < 0 && !initialFetch)
            return true;
        for (i = 0; i < rInf.count(); ++i)
            // todo - handle other types
            values[i + idx] = TQString::fromUtf8((char *)(sqlite3_column_text(stmt, i)));
 //           values[i + idx] = utf8 ? TQString::fromUtf8(fvals[i]) : TQString::fromAscii(fvals[i]);
        return true;
    case SQLITE_DONE:
        if (rInf.isEmpty())
            // must be first call.
            initColumns();
        q->setAt(TQSql::AfterLast);
        return false;
    case SQLITE_ERROR:
    case SQLITE_MISUSE:
    default:
        // something wrong, don't get col info, but still return false
        q->setLastError(qMakeError(access, "Unable to fetch row", TQSqlError::Connection, res));
        finalize();
        q->setAt(TQSql::AfterLast);
        return false;
    }
    return false;
}

TQSQLite3Result::TQSQLite3Result(const TQSQLite3Driver* db)
    : TQSqlCachedResult(db)
{
    d = new TQSQLite3ResultPrivate(this);
    d->access = db->d->access;
}

TQSQLite3Result::~TQSQLite3Result()
{
    d->cleanup();
    delete d;
}

/*
   Execute \a query.
*/
bool TQSQLite3Result::reset (const TQString &query)
{
    // this is where we build a query.
    if (!driver() || !driver()->isOpen() || driver()->isOpenError())
        return false;

    d->cleanup();

    setSelect(false);

    int res = sqlite3_prepare(d->access, query.utf8().data(), (query.length() + 1) * sizeof(TQChar),
                                &d->stmt, 0);

    if (res != SQLITE_OK) {
        setLastError(qMakeError(d->access, "Unable to execute statement", TQSqlError::Statement, res));
        d->finalize();
        return false;
    }

    d->skippedStatus = d->fetchNext(cache(), 0, true);

    setSelect(!d->rInf.isEmpty());
    setActive(true);
    return true;
}

bool TQSQLite3Result::gotoNext(TQSqlCachedResult::ValueCache& row, int idx)
{
    return d->fetchNext(row, idx, false);
}

int TQSQLite3Result::size()
{
    return -1;
}

int TQSQLite3Result::numRowsAffected()
{
    return sqlite3_changes(d->access);
}

/////////////////////////////////////////////////////////

TQSQLite3Driver::TQSQLite3Driver(TQObject * parent, const char *name)
    : TQSqlDriver(parent, name)
{
    d = new TQSQLite3DriverPrivate();
}

TQSQLite3Driver::TQSQLite3Driver(sqlite3 *connection, TQObject *parent, const char *name)
    : TQSqlDriver(parent, name)
{
    d = new TQSQLite3DriverPrivate();
    d->access = connection;
    setOpen(true);
    setOpenError(false);
}


TQSQLite3Driver::~TQSQLite3Driver()
{
    delete d;
}

bool TQSQLite3Driver::hasFeature(DriverFeature f) const
{
    switch (f) {
    case Transactions:
    case Unicode:
    case BLOB:
        return true;
    default:
        break;
    }
    return false;
}

/*
   SQLite dbs have no user name, passwords, hosts or ports.
   just file names.
*/
bool TQSQLite3Driver::open(const TQString & db, const TQString &, const TQString &, const TQString &, int, const TQString &)
{
    if (isOpen())
        close();

    if (db.isEmpty())
        return false;

    if (sqlite3_open(TQFile::encodeName(db), &d->access) == SQLITE_OK) {
        setOpen(true);
        setOpenError(false);
        return true;
    } else {
        setLastError(qMakeError(d->access, "Error opening database",
                     TQSqlError::Connection));
        setOpenError(true);
        return false;
    }
}

void TQSQLite3Driver::close()
{
    if (isOpen()) {
        if (sqlite3_close(d->access) != SQLITE_OK)
            setLastError(qMakeError(d->access, "Error closing database",
                                    TQSqlError::Connection));
        d->access = 0;
        setOpen(false);
        setOpenError(false);
    }
}

TQSqlQuery TQSQLite3Driver::createQuery() const
{
    return TQSqlQuery(new TQSQLite3Result(this));
}

bool TQSQLite3Driver::beginTransaction()
{
    if (!isOpen() || isOpenError())
        return false;

    TQSqlQuery q(createQuery());
    if (!q.exec("BEGIN")) {
        setLastError(TQSqlError("Unable to begin transaction",
                               q.lastError().databaseText(), TQSqlError::Transaction));
        return false;
    }

    return true;
}

bool TQSQLite3Driver::commitTransaction()
{
    if (!isOpen() || isOpenError())
        return false;

    TQSqlQuery q(createQuery());
    if (!q.exec("COMMIT")) {
        setLastError(TQSqlError("Unable to begin transaction",
                               q.lastError().databaseText(), TQSqlError::Transaction));
        return false;
    }

    return true;
}

bool TQSQLite3Driver::rollbackTransaction()
{
    if (!isOpen() || isOpenError())
        return false;

    TQSqlQuery q(createQuery());
    if (!q.exec("ROLLBACK")) {
        setLastError(TQSqlError("Unable to begin transaction",
                               q.lastError().databaseText(), TQSqlError::Transaction));
        return false;
    }

    return true;
}

TQStringList TQSQLite3Driver::tables(const TQString &typeName) const
{
    TQStringList res;
    if (!isOpen())
        return res;
    int type = typeName.toInt();

    TQSqlQuery q = createQuery();
    q.setForwardOnly(TRUE);
    if ((type & (int)TQSql::Tables) && (type & (int)TQSql::Views))
        q.exec("SELECT name FROM sqlite_master WHERE type='table' OR type='view'");
    else if (typeName.isEmpty() || (type & (int)TQSql::Tables))
        q.exec("SELECT name FROM sqlite_master WHERE type='table'");
    else if (type & (int)TQSql::Views)
        q.exec("SELECT name FROM sqlite_master WHERE type='view'");


    if (q.isActive()) {
        while(q.next())
            res.append(q.value(0).toString());
    }

    if (type & (int)TQSql::SystemTables) {
        // there are no internal tables beside this one:
        res.append("sqlite_master");
    }

    return res;
}

TQSqlIndex TQSQLite3Driver::primaryIndex(const TQString &tblname) const
{
    TQSqlRecordInfo rec(recordInfo(tblname)); // expensive :(

    if (!isOpen())
        return TQSqlIndex();

    TQSqlQuery q = createQuery();
    q.setForwardOnly(TRUE);
    // finrst find a UNIQUE INDEX
    q.exec("PRAGMA index_list('" + tblname + "');");
    TQString indexname;
    while(q.next()) {
	if (q.value(2).toInt()==1) {
	    indexname = q.value(1).toString();
	    break;
	}
    }
    if (indexname.isEmpty())
	return TQSqlIndex();

    q.exec("PRAGMA index_info('" + indexname + "');");

    TQSqlIndex index(indexname);
    while(q.next()) {
	TQString name = q.value(2).toString();
	TQSqlVariant::Type type = TQSqlVariant::Invalid;
	if (rec.contains(name))
	    type = rec.find(name).type();
	index.append(TQSqlField(name, type));
    }
    return index;
}

TQSqlRecordInfo TQSQLite3Driver::recordInfo(const TQString &tbl) const
{
    if (!isOpen())
        return TQSqlRecordInfo();

    TQSqlQuery q = createQuery();
    q.setForwardOnly(TRUE);
    q.exec("SELECT * FROM " + tbl + " LIMIT 1");
    return recordInfo(q);
}

TQSqlRecord TQSQLite3Driver::record(const TQString &tblname) const
{
    if (!isOpen())
        return TQSqlRecord();

    return recordInfo(tblname).toRecord();
}

TQSqlRecord TQSQLite3Driver::record(const TQSqlQuery& query) const
{
    if (query.isActive() && query.driver() == this) {
        TQSQLite3Result* result = (TQSQLite3Result*)query.result();
        return result->d->rInf;
    }
    return TQSqlRecord();
}

TQSqlRecordInfo TQSQLite3Driver::recordInfo(const TQSqlQuery& query) const
{
    if (query.isActive() && query.driver() == this) {
        TQSQLite3Result* result = (TQSQLite3Result*)query.result();
        return TQSqlRecordInfo(result->d->rInf);
    }
    return TQSqlRecordInfo();
}