// Copyright (C) 2020 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only #include "qsql_mysql_p.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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*) Q_DECLARE_METATYPE(MYSQL_STMT*) // MySQL above version 8 removed my_bool typedef while MariaDB kept it, // by redefining it we can regain source compatibility. using my_bool = decltype(mysql_stmt_bind_result(nullptr, nullptr)); QT_BEGIN_NAMESPACE using namespace Qt::StringLiterals; class QMYSQLDriverPrivate : public QSqlDriverPrivate { Q_DECLARE_PUBLIC(QMYSQLDriver) public: QMYSQLDriverPrivate() : QSqlDriverPrivate(QSqlDriver::MySqlServer) {} MYSQL *mysql = nullptr; bool preparedQuerysEnabled = false; }; static inline QVariant qDateFromString(const QString &val) { #if !QT_CONFIG(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) { #if !QT_CONFIG(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) { #if !QT_CONFIG(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, u'-').insert(7, u'-').insert(10, u'T').insert(13, u':').insert(16, u':'); return QVariant(QDateTime::fromString(val, Qt::ISODate)); #endif } // check if this client and server version of MySQL/MariaDB support prepared statements static inline bool checkPreparedQueries(MYSQL *mysql) { std::unique_ptr stmt(mysql_stmt_init(mysql), &mysql_stmt_close); if (!stmt) return false; static const char dummyQuery[] = "SELECT ? + ?"; if (mysql_stmt_prepare(stmt.get(), dummyQuery, sizeof(dummyQuery) - 1)) return false; return mysql_stmt_param_count(stmt.get()) == 2; } class QMYSQLResultPrivate; class QMYSQLResult : public QSqlResult { Q_DECLARE_PRIVATE(QMYSQLResult) friend class QMYSQLDriver; public: explicit QMYSQLResult(const QMYSQLDriver *db); ~QMYSQLResult(); QVariant handle() const override; protected: void cleanup(); bool fetch(int i) override; bool fetchNext() override; bool fetchLast() override; bool fetchFirst() override; QVariant data(int field) override; bool isNull(int field) override; bool reset (const QString& query) override; int size() override; int numRowsAffected() override; QVariant lastInsertId() const override; QSqlRecord record() const override; void virtual_hook(int id, void *data) override; bool nextResult() override; void detachFromResultSet() override; bool prepare(const QString &stmt) override; bool exec() override; }; class QMYSQLResultPrivate: public QSqlResultPrivate { Q_DECLARE_PUBLIC(QMYSQLResult) public: Q_DECLARE_SQLDRIVER_PRIVATE(QMYSQLDriver) using QSqlResultPrivate::QSqlResultPrivate; bool bindInValues(); void bindBlobs(); MYSQL_RES *result = nullptr; MYSQL_ROW row; struct QMyField { char *outField = nullptr; const MYSQL_FIELD *myField = nullptr; QMetaType type = QMetaType(); my_bool nullIndicator = false; ulong bufLength = 0ul; }; QList fields; MYSQL_STMT *stmt = nullptr; MYSQL_RES *meta = nullptr; MYSQL_BIND *inBinds = nullptr; MYSQL_BIND *outBinds = nullptr; int rowsAffected = 0; bool hasBlobs = false; bool preparedQuery = false; }; static QSqlError qMakeError(const QString& err, QSqlError::ErrorType type, const QMYSQLDriverPrivate* p) { const char *cerr = p->mysql ? mysql_error(p->mysql) : 0; return QSqlError("QMYSQL: "_L1 + err, QString::fromUtf8(cerr), type, QString::number(mysql_errno(p->mysql))); } static QMetaType qDecodeMYSQLType(int mysqltype, uint flags) { QMetaType::Type type; switch (mysqltype) { case FIELD_TYPE_TINY : type = (flags & UNSIGNED_FLAG) ? QMetaType::UChar : QMetaType::Char; break; case FIELD_TYPE_SHORT : type = (flags & UNSIGNED_FLAG) ? QMetaType::UShort : QMetaType::Short; break; case FIELD_TYPE_LONG : case FIELD_TYPE_INT24 : type = (flags & UNSIGNED_FLAG) ? QMetaType::UInt : QMetaType::Int; break; case FIELD_TYPE_YEAR : type = QMetaType::Int; break; case FIELD_TYPE_LONGLONG : type = (flags & UNSIGNED_FLAG) ? QMetaType::ULongLong : QMetaType::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 = QMetaType::Double; break; case FIELD_TYPE_DATE : type = QMetaType::QDate; break; case FIELD_TYPE_TIME : // A time field can be within the range '-838:59:59' to '838:59:59' so // use QString instead of QTime since QTime is limited to 24 hour clock type = QMetaType::QString; break; case FIELD_TYPE_DATETIME : case FIELD_TYPE_TIMESTAMP : type = QMetaType::QDateTime; 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 : case FIELD_TYPE_GEOMETRY : type = (flags & BINARY_FLAG) ? QMetaType::QByteArray : QMetaType::QString; break; default: case FIELD_TYPE_ENUM : case FIELD_TYPE_SET : type = QMetaType::QString; break; } return QMetaType(type); } static QSqlField qToField(MYSQL_FIELD *field) { QSqlField f(QString::fromUtf8(field->name), qDecodeMYSQLType(int(field->type), field->flags), QString::fromUtf8(field->table)); 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; } static QSqlError qMakeStmtError(const QString& err, QSqlError::ErrorType type, MYSQL_STMT* stmt) { const char *cerr = mysql_stmt_error(stmt); return QSqlError("QMYSQL: "_L1 + err, QString::fromLatin1(cerr), type, QString::number(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 qIsTimeOrDate(int t) { // *not* MYSQL_TYPE_TIME because its range is bigger than QTime // (see above) return t == MYSQL_TYPE_DATE || t == MYSQL_TYPE_DATETIME || t == MYSQL_TYPE_TIMESTAMP; } 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() { for (int i = 0; i < fields.count(); ++i) { const MYSQL_FIELD *fieldInfo = fields.at(i).myField; if (qIsBlob(inBinds[i].buffer_type) && meta && fieldInfo) { MYSQL_BIND *bind = &inBinds[i]; bind->buffer_length = fieldInfo->max_length; delete[] static_cast(bind->buffer); bind->buffer = new char[fieldInfo->max_length]; fields[i].outField = static_cast(bind->buffer); } } } bool QMYSQLResultPrivate::bindInValues() { 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)); const MYSQL_FIELD *fieldInfo; int i = 0; while((fieldInfo = mysql_fetch_field(meta))) { MYSQL_BIND *bind = &inBinds[i]; QMyField &f = fields[i]; f.myField = fieldInfo; bind->buffer_length = f.bufLength = fieldInfo->length + 1; bind->buffer_type = fieldInfo->type; 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() bind->buffer_length = f.bufLength = 0; hasBlobs = true; } else if (qIsTimeOrDate(fieldInfo->type)) { bind->buffer_length = f.bufLength = sizeof(MYSQL_TIME); } else if (qIsInteger(f.type.id())) { bind->buffer_length = f.bufLength = 8; } else { bind->buffer_type = MYSQL_TYPE_STRING; } bind->is_null = &f.nullIndicator; bind->length = &f.bufLength; bind->is_unsigned = fieldInfo->flags & UNSIGNED_FLAG ? 1 : 0; char *field = bind->buffer_length ? new char[bind->buffer_length + 1]{} : nullptr; bind->buffer = f.outField = field; ++i; } return true; } QMYSQLResult::QMYSQLResult(const QMYSQLDriver* db) : QSqlResult(*new QMYSQLResultPrivate(this, db)) { } QMYSQLResult::~QMYSQLResult() { cleanup(); } QVariant QMYSQLResult::handle() const { Q_D(const QMYSQLResult); if (d->preparedQuery) return d->meta ? QVariant::fromValue(d->meta) : QVariant::fromValue(d->stmt); else return QVariant::fromValue(d->result); } void QMYSQLResult::cleanup() { Q_D(QMYSQLResult); if (d->result) mysql_free_result(d->result); // must iterate through leftover result sets from multi-selects or stored procedures // if this isn't done subsequent queries will fail with "Commands out of sync" 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); } 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; } d->hasBlobs = false; d->fields.clear(); d->result = nullptr; d->row = nullptr; 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) { mysql_stmt_data_seek(d->stmt, i); int nRC = mysql_stmt_fetch(d->stmt); if (nRC) { if (nRC == 1 || nRC == MYSQL_DATA_TRUNCATED) setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult", "Unable to fetch data"), QSqlError::StatementError, d->stmt)); return false; } } 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) { int nRC = mysql_stmt_fetch(d->stmt); if (nRC) { if (nRC == 1 || nRC == MYSQL_DATA_TRUNCATED) setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult", "Unable to fetch data"), QSqlError::StatementError, d->stmt)); return false; } } 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) { numRows = mysql_stmt_num_rows(d->stmt); } 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(); my_ulonglong 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.id())) { QVariant variant(f.type, f.outField); // we never want to return char variants here, see QTBUG-53397 if (f.type.id() == QMetaType::UChar) return variant.toUInt(); else if (f.type.id() == QMetaType::Char) return variant.toInt(); return variant; } else if (qIsTimeOrDate(f.myField->type) && f.bufLength == sizeof(MYSQL_TIME)) { auto t = reinterpret_cast(f.outField); QDate date; QTime time; if (f.type.id() != QMetaType::QTime) date = QDate(t->year, t->month, t->day); if (f.type.id() != QMetaType::QDate) time = QTime(t->hour, t->minute, t->second, t->second_part / 1000); if (f.type.id() == QMetaType::QDateTime) return QDateTime(date, time); else if (f.type.id() == QMetaType::QDate) return date; else return time; } if (f.type.id() != QMetaType::QByteArray) val = QString::fromUtf8(f.outField, f.bufLength); } else { if (d->row[field] == nullptr) { // NULL value return QVariant(f.type); } fieldLength = mysql_fetch_lengths(d->result)[field]; if (f.type.id() != QMetaType::QByteArray) val = QString::fromUtf8(d->row[field], fieldLength); } switch (f.type.id()) { case QMetaType::LongLong: return QVariant(val.toLongLong()); case QMetaType::ULongLong: return QVariant(val.toULongLong()); case QMetaType::Char: case QMetaType::Short: case QMetaType::Int: return QVariant(val.toInt()); case QMetaType::UChar: case QMetaType::UShort: case QMetaType::UInt: return QVariant(val.toUInt()); case QMetaType::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; return QVariant(); } case QMetaType::QDate: return qDateFromString(val); case QMetaType::QTime: return qTimeFromString(val); case QMetaType::QDateTime: return qDateTimeFromString(val); case QMetaType::QByteArray: { QByteArray ba; if (d->preparedQuery) { ba = QByteArray(f.outField, f.bufLength); } else { ba = QByteArray(d->row[field], fieldLength); } return QVariant(ba); } case QMetaType::QString: default: return QVariant(val); } Q_UNREACHABLE(); } 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] == nullptr; } bool QMYSQLResult::reset (const QString& query) { Q_D(QMYSQLResult); if (!driver() || !driver()->isOpen() || driver()->isOpenError()) return false; d->preparedQuery = false; cleanup(); const QByteArray encQuery = query.toUtf8(); 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) return mysql_stmt_num_rows(d->stmt); else return int(mysql_num_rows(d->result)); else return -1; } int QMYSQLResult::numRowsAffected() { Q_D(const QMYSQLResult); return d->rowsAffected; } void QMYSQLResult::detachFromResultSet() { Q_D(QMYSQLResult); if (d->preparedQuery) { mysql_stmt_free_result(d->stmt); } } QVariant QMYSQLResult::lastInsertId() const { Q_D(const QMYSQLResult); if (!isActive() || !driver()) return QVariant(); if (d->preparedQuery) { quint64 id = mysql_stmt_insert_id(d->stmt); if (id) return QVariant(id); } 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; res = d->preparedQuery ? d->meta : d->result; 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)); field = mysql_fetch_field(res); } } mysql_field_seek(res, 0); return info; } bool QMYSQLResult::nextResult() { Q_D(QMYSQLResult); if (!driver()) return false; 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; } void QMYSQLResult::virtual_hook(int id, void *data) { QSqlResult::virtual_hook(id, data); } static MYSQL_TIME *toMySqlDate(QDate date, QTime time, int type) { Q_ASSERT(type == QMetaType::QTime || type == QMetaType::QDate || type == QMetaType::QDateTime); MYSQL_TIME *myTime = new MYSQL_TIME; memset(myTime, 0, sizeof(MYSQL_TIME)); if (type == QMetaType::QTime || type == QMetaType::QDateTime) { myTime->hour = time.hour(); myTime->minute = time.minute(); myTime->second = time.second(); myTime->second_part = time.msec() * 1000; } if (type == QMetaType::QDate || type == QMetaType::QDateTime) { 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; 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 = query.toUtf8(); 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; } bool QMYSQLResult::exec() { Q_D(QMYSQLResult); if (!driver()) return false; if (!d->preparedQuery) return QSqlResult::exec(); if (!d->stmt) return false; int r = 0; QList timeVector; QList stringVector; QList nullVector; const QList 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(val.constData()); MYSQL_BIND* currBind = &d->outBinds[i]; nullVector[i] = static_cast(QSqlResultPrivate::isVariantNull(val)); currBind->is_null = &nullVector[i]; currBind->length = 0; currBind->is_unsigned = 0; switch (val.userType()) { case QMetaType::QByteArray: currBind->buffer_type = MYSQL_TYPE_BLOB; currBind->buffer = const_cast(val.toByteArray().constData()); currBind->buffer_length = val.toByteArray().size(); break; case QMetaType::QTime: case QMetaType::QDate: case QMetaType::QDateTime: { MYSQL_TIME *myTime = toMySqlDate(val.toDate(), val.toTime(), val.userType()); timeVector.append(myTime); currBind->buffer = myTime; switch (val.userType()) { case QMetaType::QTime: currBind->buffer_type = MYSQL_TYPE_TIME; myTime->time_type = MYSQL_TIMESTAMP_TIME; break; case QMetaType::QDate: currBind->buffer_type = MYSQL_TYPE_DATE; myTime->time_type = MYSQL_TIMESTAMP_DATE; break; case QMetaType::QDateTime: 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 QMetaType::UInt: case QMetaType::Int: currBind->buffer_type = MYSQL_TYPE_LONG; currBind->buffer = data; currBind->buffer_length = sizeof(int); currBind->is_unsigned = (val.userType() != QMetaType::Int); break; case QMetaType::Bool: currBind->buffer_type = MYSQL_TYPE_TINY; currBind->buffer = data; currBind->buffer_length = sizeof(bool); currBind->is_unsigned = false; break; case QMetaType::Double: currBind->buffer_type = MYSQL_TYPE_DOUBLE; currBind->buffer = data; currBind->buffer_length = sizeof(double); break; case QMetaType::LongLong: case QMetaType::ULongLong: currBind->buffer_type = MYSQL_TYPE_LONGLONG; currBind->buffer = data; currBind->buffer_length = sizeof(qint64); currBind->is_unsigned = (val.userType() == QMetaType::ULongLong); break; case QMetaType::QString: default: { QByteArray ba = val.toString().toUtf8(); stringVector.append(ba); currBind->buffer_type = MYSQL_TYPE_STRING; currBind->buffer = const_cast(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; } ///////////////////////////////////////////////////////// static int qMySqlConnectionCount = 0; static bool qMySqlInitHandledByUser = false; static void qLibraryInit() { #ifndef Q_NO_MYSQL_EMBEDDED if (qMySqlInitHandledByUser || qMySqlConnectionCount > 1) return; if (mysql_library_init(0, 0, 0)) { qWarning("QMYSQLDriver::qServerInit: unable to start server."); } #endif // Q_NO_MYSQL_EMBEDDED #if defined(MARIADB_BASE_VERSION) || defined(MARIADB_VERSION_ID) qAddPostRoutine([]() { mysql_server_end(); }); #endif } static void qLibraryEnd() { #if !defined(MARIADB_BASE_VERSION) && !defined(MARIADB_VERSION_ID) # if !defined(Q_NO_MYSQL_EMBEDDED) mysql_library_end(); # 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 = con; 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: if (d->mysql) { if ((d->mysql->server_capabilities & CLIENT_TRANSACTIONS) == CLIENT_TRANSACTIONS) return true; } 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: return d->preparedQuerysEnabled; case MultipleResultSets: return true; } return false; } static void setOptionFlag(uint &optionFlags, const QString &opt) { if (opt == "CLIENT_COMPRESS"_L1) optionFlags |= CLIENT_COMPRESS; else if (opt == "CLIENT_FOUND_ROWS"_L1) optionFlags |= CLIENT_FOUND_ROWS; else if (opt == "CLIENT_IGNORE_SPACE"_L1) optionFlags |= CLIENT_IGNORE_SPACE; else if (opt == "CLIENT_INTERACTIVE"_L1) optionFlags |= CLIENT_INTERACTIVE; else if (opt == "CLIENT_NO_SCHEMA"_L1) optionFlags |= CLIENT_NO_SCHEMA; else if (opt == "CLIENT_ODBC"_L1) optionFlags |= CLIENT_ODBC; else if (opt == "CLIENT_SSL"_L1) 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 = CLIENT_MULTI_STATEMENTS; const QStringList opts(connOpts.split(u';', Qt::SkipEmptyParts)); QString unixSocket; QString sslCert; QString sslCA; QString sslKey; QString sslCAPath; QString sslCipher; my_bool reconnect=false; uint connectTimeout = 0; uint readTimeout = 0; uint writeTimeout = 0; // extract the real options from the string for (int i = 0; i < opts.count(); ++i) { QString tmp(opts.at(i).simplified()); qsizetype idx; if ((idx = tmp.indexOf(u'=')) != -1) { QString val = tmp.mid(idx + 1).simplified(); QString opt = tmp.left(idx).simplified(); if (opt == "UNIX_SOCKET"_L1) unixSocket = val; else if (opt == "MYSQL_OPT_RECONNECT"_L1) { if (val == "TRUE"_L1 || val == "1"_L1 || val.isEmpty()) reconnect = true; } else if (opt == "MYSQL_OPT_CONNECT_TIMEOUT"_L1) connectTimeout = val.toInt(); else if (opt == "MYSQL_OPT_READ_TIMEOUT"_L1) readTimeout = val.toInt(); else if (opt == "MYSQL_OPT_WRITE_TIMEOUT"_L1) writeTimeout = val.toInt(); else if (opt == "SSL_KEY"_L1) sslKey = val; else if (opt == "SSL_CERT"_L1) sslCert = val; else if (opt == "SSL_CA"_L1) sslCA = val; else if (opt == "SSL_CAPATH"_L1) sslCAPath = val; else if (opt == "SSL_CIPHER"_L1) sslCipher = val; else if (val == "TRUE"_L1 || val == "1"_L1) 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(nullptr))) { setLastError(qMakeError(tr("Unable to allocate a MYSQL object"), QSqlError::ConnectionError, d)); setOpenError(true); return false; } // try utf8 with non BMP first, utf8 (BMP only) if that fails static const char wanted_charsets[][8] = { "utf8mb4", "utf8" }; #ifdef MARIADB_VERSION_ID MARIADB_CHARSET_INFO *cs = nullptr; for (const char *p : wanted_charsets) { cs = mariadb_get_charset_by_name(p); if (cs) { d->mysql->charset = cs; break; } } #else // dummy struct { const char *csname; } *cs = nullptr; #endif if (!sslKey.isNull() || !sslCert.isNull() || !sslCA.isNull() || !sslCAPath.isNull() || !sslCipher.isNull()) { mysql_ssl_set(d->mysql, sslKey.isNull() ? nullptr : sslKey.toUtf8().constData(), sslCert.isNull() ? nullptr : sslCert.toUtf8().constData(), sslCA.isNull() ? nullptr : sslCA.toUtf8().constData(), sslCAPath.isNull() ? nullptr : sslCAPath.toUtf8().constData(), sslCipher.isNull() ? nullptr : sslCipher.toUtf8().constData()); } 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); MYSQL *mysql = mysql_real_connect(d->mysql, host.isNull() ? nullptr : host.toUtf8().constData(), user.isNull() ? nullptr : user.toUtf8().constData(), password.isNull() ? nullptr : password.toUtf8().constData(), db.isNull() ? nullptr : db.toUtf8().constData(), (port > -1) ? port : 0, unixSocket.isNull() ? nullptr : unixSocket.toUtf8().constData(), optionFlags); if (mysql != d->mysql) { setLastError(qMakeError(tr("Unable to connect"), QSqlError::ConnectionError, d)); mysql_close(d->mysql); d->mysql = nullptr; setOpenError(true); return false; } // now ask the server to match the charset we selected if (!cs || mysql_set_character_set(d->mysql, cs->csname) != 0) { bool ok = false; for (const char *p : wanted_charsets) { if (mysql_set_character_set(d->mysql, p) == 0) { ok = true; break; } } if (!ok) qWarning("MySQL: Unable to set the client character set to utf8 (\"%s\"). Using '%s' instead.", mysql_error(d->mysql), mysql_character_set_name(d->mysql)); } if (!db.isEmpty() && mysql_select_db(d->mysql, db.toUtf8().constData())) { setLastError(qMakeError(tr("Unable to open database '%1'").arg(db), QSqlError::ConnectionError, d)); mysql_close(d->mysql); setOpenError(true); return false; } if (reconnect) mysql_options(d->mysql, MYSQL_OPT_RECONNECT, &reconnect); d->preparedQuerysEnabled = checkPreparedQueries(d->mysql); #if QT_CONFIG(thread) mysql_thread_init(); #endif setOpen(true); setOpenError(false); return true; } void QMYSQLDriver::close() { Q_D(QMYSQLDriver); if (isOpen()) { #if QT_CONFIG(thread) mysql_thread_end(); #endif mysql_close(d->mysql); d->mysql = nullptr; 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; QSqlQuery q(createResult()); if (type & QSql::Tables) { QString sql = "select table_name from information_schema.tables where table_schema = '"_L1 + QLatin1StringView(d->mysql->db) + "' and table_type = 'BASE TABLE'"_L1; q.exec(sql); while (q.next()) tl.append(q.value(0).toString()); } if (type & QSql::Views) { QString sql = "select table_name from information_schema.tables where table_schema = '"_L1 + QLatin1StringView(d->mysql->db) + "' and table_type = 'VIEW'"_L1; q.exec(sql); while (q.next()) tl.append(q.value(0).toString()); } return tl; } QSqlIndex QMYSQLDriver::primaryIndex(const QString& tablename) const { QSqlIndex idx; if (!isOpen()) return idx; QSqlQuery i(createResult()); QString stmt("show index from %1;"_L1); QSqlRecord fil = record(tablename); i.exec(stmt.arg(escapeIdentifier(tablename, QSqlDriver::TableName))); while (i.isActive() && i.next()) { if (i.value(2).toString() == "PRIMARY"_L1) { 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.toUtf8().constData(), 0); if (!r) { return info; } MYSQL_FIELD* field; while ((field = mysql_fetch_field(r))) info.append(qToField(field)); 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); 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); 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); 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.metaType().id()) { case QMetaType::Double: r = QString::number(field.value().toDouble(), 'g', field.precision()); break; case QMetaType::QString: // Escape '\' characters r = QSqlDriver::formatValue(field, trimStrings); r.replace("\\"_L1, "\\\\"_L1); break; case QMetaType::QByteArray: if (isOpen()) { const QByteArray ba = field.value().toByteArray(); // buffer has to be at least length*2+1 bytes QVarLengthArray buffer(ba.size() * 2 + 1); auto escapedSize = mysql_real_escape_string(d->mysql, buffer.data(), ba.data(), ba.size()); r.reserve(escapedSize + 3); r = u'\'' + QString::fromUtf8(buffer.data(), escapedSize) + u'\''; break; } else { qWarning("QMYSQLDriver::formatValue: Database not open"); } Q_FALLTHROUGH(); case QMetaType::QDateTime: if (QDateTime dt = field.value().toDateTime(); dt.isValid()) { // MySQL format doesn't like the "Z" at the end, but does allow // "+00:00" starting in version 8.0.19. However, if we got here, // it's because the MySQL server is too old for prepared queries // in the first place, so it won't understand timezones either. // Besides, MYSQL_TIME does not support timezones, so match it. r = u'\'' + dt.date().toString(Qt::ISODate) + u'T' + dt.time().toString(Qt::ISODate) + u'\''; } break; default: r = QSqlDriver::formatValue(field, trimStrings); } } return r; } QString QMYSQLDriver::escapeIdentifier(const QString &identifier, IdentifierType) const { QString res = identifier; if (!identifier.isEmpty() && !identifier.startsWith(u'`') && !identifier.endsWith(u'`') ) { res.prepend(u'`').append(u'`'); res.replace(u'.', "`.`"_L1); } return res; } bool QMYSQLDriver::isIdentifierEscaped(const QString &identifier, IdentifierType type) const { Q_UNUSED(type); return identifier.size() > 2 && identifier.startsWith(u'`') //left delimited && identifier.endsWith(u'`'); //right delimited } QT_END_NAMESPACE #include "moc_qsql_mysql_p.cpp"