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qsql_mysql.cpp
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// 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 <qcoreapplication.h>
#include <qvariant.h>
#include <qvarlengtharray.h>
#include <qdatetime.h>
#include <qdebug.h>
#include <qfile.h>
#include <qlist.h>
#include <qloggingcategory.h>
#include <qsqlerror.h>
#include <qsqlfield.h>
#include <qsqlindex.h>
#include <qsqlquery.h>
#include <qsqlrecord.h>
#include <qstringlist.h>
#include <qtimezone.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*)
Q_DECLARE_METATYPE(MYSQL_STMT*)
// MYSQL_TYPE_JSON was introduced with MySQL 5.7.9
#if defined(MYSQL_VERSION_ID) && MYSQL_VERSION_ID < 50709
#define MYSQL_TYPE_JSON 245
#endif
// 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));
// this is a copy of the old MYSQL_TIME before an additional integer was added in
// 8.0.27.0. This kills the sanity check during retrieving this struct from mysql
// when another libmysql version is used during runtime than during compile time
struct QT_MYSQL_TIME
{
unsigned int year, month, day, hour, minute, second;
unsigned long second_part; /**< microseconds */
my_bool neg;
enum enum_mysql_timestamp_type time_type;
};
QT_BEGIN_NAMESPACE
Q_STATIC_LOGGING_CATEGORY(lcMysql, "qt.sql.mysql")
using namespace Qt::StringLiterals;
class QMYSQLDriverPrivate : public QSqlDriverPrivate
{
Q_DECLARE_PUBLIC(QMYSQLDriver)
public:
QMYSQLDriverPrivate() : QSqlDriverPrivate(QSqlDriver::MySqlServer)
{}
MYSQL *mysql = nullptr;
QString dbName;
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());
// TIMESTAMPS have either the format "yyyyMMddhhmmss" or "yyyy-MM-dd
// hh:mm:ss". QDateTime::fromString() can convert the latter, but not the
// former, so adapt it if necessary.
if (val.size() == 14)
val.insert(4, u'-').insert(7, u'-').insert(10, u'T').insert(13, u':').insert(16, u':');
if (!val.endsWith(u'Z'))
val.append(u'Z'); // make UTC
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<MYSQL_STMT, decltype(&mysql_stmt_close)> 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;
}
// used with prepared queries and bound arguments
static inline void setUtcTimeZone(MYSQL *mysql)
{
std::unique_ptr<MYSQL_STMT, decltype(&mysql_stmt_close)> stmt(mysql_stmt_init(mysql), &mysql_stmt_close);
if (!stmt)
return;
static const char query[] = "SET time_zone = '+00:00'";
if (mysql_stmt_prepare(stmt.get(), query, sizeof(query) - 1))
mysql_stmt_execute(stmt.get());
}
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<QMyField> 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) : nullptr;
return QSqlError("QMYSQL: "_L1 + err,
QString::fromUtf8(cerr),
type, QString::number(mysql_errno(p->mysql)));
}
static QMetaType qDecodeMYSQLType(enum_field_types mysqltype, uint flags)
{
QMetaType::Type type;
switch (mysqltype) {
case MYSQL_TYPE_TINY:
type = (flags & UNSIGNED_FLAG) ? QMetaType::UChar : QMetaType::Char;
break;
case MYSQL_TYPE_SHORT:
type = (flags & UNSIGNED_FLAG) ? QMetaType::UShort : QMetaType::Short;
break;
case MYSQL_TYPE_LONG:
case MYSQL_TYPE_INT24:
type = (flags & UNSIGNED_FLAG) ? QMetaType::UInt : QMetaType::Int;
break;
case MYSQL_TYPE_YEAR:
type = QMetaType::Int;
break;
case MYSQL_TYPE_BIT:
case MYSQL_TYPE_LONGLONG:
type = (flags & UNSIGNED_FLAG) ? QMetaType::ULongLong : QMetaType::LongLong;
break;
case MYSQL_TYPE_FLOAT:
case MYSQL_TYPE_DOUBLE:
case MYSQL_TYPE_DECIMAL:
case MYSQL_TYPE_NEWDECIMAL:
type = QMetaType::Double;
break;
case MYSQL_TYPE_DATE:
type = QMetaType::QDate;
break;
case MYSQL_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 MYSQL_TYPE_DATETIME:
case MYSQL_TYPE_TIMESTAMP:
type = QMetaType::QDateTime;
break;
case MYSQL_TYPE_STRING:
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_BLOB:
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_GEOMETRY:
case MYSQL_TYPE_JSON:
type = (flags & BINARY_FLAG) ? QMetaType::QByteArray : QMetaType::QString;
break;
case MYSQL_TYPE_ENUM:
case MYSQL_TYPE_SET:
type = QMetaType::QString;
break;
default: // needed because there are more enum values which are not available in all headers
type = QMetaType::QString;
break;
}
return QMetaType(type);
}
static QSqlField qToField(MYSQL_FIELD *field)
{
QSqlField f(QString::fromUtf8(field->name),
qDecodeMYSQLType(field->type, field->flags),
QString::fromUtf8(field->table));
f.setRequired(IS_NOT_NULL(field->flags));
f.setLength(field->length);
f.setPrecision(field->decimals);
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(enum_field_types t)
{
return t == MYSQL_TYPE_TINY_BLOB
|| t == MYSQL_TYPE_BLOB
|| t == MYSQL_TYPE_MEDIUM_BLOB
|| t == MYSQL_TYPE_LONG_BLOB
|| t == MYSQL_TYPE_JSON;
}
static bool qIsTimeOrDate(enum_field_types 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;
}
static inline bool qIsBitfield(enum_field_types type)
{
return type == MYSQL_TYPE_BIT;
}
void QMYSQLResultPrivate::bindBlobs()
{
for (int i = 0; i < fields.size(); ++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<char*>(bind->buffer);
bind->buffer = new char[fieldInfo->max_length];
fields[i].outField = static_cast<char*>(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(QT_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))
qCWarning(lcMysql, "QMYSQLResult::cleanup: unable to free statement handle");
d->stmt = 0;
}
if (d->meta) {
mysql_free_result(d->meta);
d->meta = 0;
}
for (const QMYSQLResultPrivate::QMyField &f : std::as_const(d->fields))
delete[] f.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 = d->preparedQuery ? mysql_stmt_num_rows(d->stmt) : 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);
}
static inline uint64_t
qDecodeBitfield(const QMYSQLResultPrivate::QMyField &f, const char *outField)
{
// byte-aligned length
const auto numBytes = (f.myField->length + 7) / 8;
uint64_t val = 0;
for (unsigned long i = 0; i < numBytes && outField; ++i) {
uint64_t tmp = static_cast<uint8_t>(outField[i]);
val <<= 8;
val |= tmp;
}
return val;
}
QVariant QMYSQLResult::data(int field)
{
Q_D(QMYSQLResult);
if (!isSelect() || field >= d->fields.size()) {
qCWarning(lcMysql, "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 (qIsBitfield(f.myField->type)) {
return QVariant::fromValue(qDecodeBitfield(f, f.outField));
} else 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(QT_MYSQL_TIME)) {
auto t = reinterpret_cast<const QT_MYSQL_TIME *>(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, QTimeZone::UTC);
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);
}
if (qIsBitfield(f.myField->type))
return QVariant::fromValue(qDecodeBitfield(f, d->row[field]));
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.size())
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.size())) {
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);
d->fields[i].myField = field;
}
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 (const QMYSQLResultPrivate::QMyField &f : std::as_const(d->fields))
delete[] f.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);
unsigned 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 (unsigned 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);
d->fields[i].myField = field;
}
}
setActive(true);
return true;
}
void QMYSQLResult::virtual_hook(int id, void *data)
{
QSqlResult::virtual_hook(id, data);
}
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.size());
if (r != 0) {
setLastError(qMakeStmtError(QCoreApplication::translate("QMYSQLResult",
"Unable to prepare statement"), QSqlError::StatementError, d->stmt));
cleanup();
return false;
}
const auto paramCount = mysql_stmt_param_count(d->stmt);
if (paramCount > 0) // allocate memory for outvalues
d->outBinds = new MYSQL_BIND[paramCount]();
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<QT_MYSQL_TIME *> timeVector;
QList<QByteArray> stringVector;
QList<my_bool> nullVector;
const QList<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;
}
const unsigned long paramCount = mysql_stmt_param_count(d->stmt);
if (paramCount > 0 && paramCount == static_cast<size_t>(values.size())) {
nullVector.resize(values.size());
for (qsizetype i = 0; i < values.size(); ++i) {
const QVariant &val = boundValues().at(i);
void *data = const_cast<void *>(val.constData());
MYSQL_BIND* currBind = &d->outBinds[i];
nullVector[i] = static_cast<my_bool>(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<char *>(val.toByteArray().constData());
currBind->buffer_length = val.toByteArray().size();
break;
case QMetaType::QTime:
case QMetaType::QDate:
case QMetaType::QDateTime: {
auto myTime = new QT_MYSQL_TIME{};
timeVector.append(myTime);
currBind->buffer = myTime;
QDate date;
QTime time;
int type = val.userType();
if (type == QMetaType::QTime) {
time = val.toTime();
currBind->buffer_type = MYSQL_TYPE_TIME;
myTime->time_type = MYSQL_TIMESTAMP_TIME;
} else if (type == QMetaType::QDate) {
date = val.toDate();
currBind->buffer_type = MYSQL_TYPE_DATE;
myTime->time_type = MYSQL_TIMESTAMP_DATE;
} else {
QDateTime dt = val.toDateTime().toUTC();
date = dt.date();
time = dt.time();
currBind->buffer_type = MYSQL_TYPE_DATETIME;
myTime->time_type = MYSQL_TIMESTAMP_DATETIME;
}
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();
}
currBind->buffer_length = sizeof(QT_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: