diff --git a/skgbasemodeler/skgdefine.h b/skgbasemodeler/skgdefine.h
index 5c0a207..7a216ae 100644
--- a/skgbasemodeler/skgdefine.h
+++ b/skgbasemodeler/skgdefine.h
@@ -28,6 +28,7 @@
 
 #include "skgbasemodeler_export.h"
 
+#if QT_VERSION < QT_VERSION_CHECK(5, 7, 0)
 
 template <typename T> struct QAddConst {
     typedef const T Type;
@@ -37,6 +38,8 @@ template <typename T> struct QAddConst {
 template <typename T>
 Q_DECL_CONSTEXPR typename QAddConst<T>::Type& qAsConst(T& t) Q_DECL_NOTHROW { return t; }
 
+#endif
+
 /**
  * @var OBJECTSEPARATOR
  * Define the separator between object and subobject
diff --git a/skgbasemodeler/skgdocument.cpp b/skgbasemodeler/skgdocument.cpp
index cec76e9..5fb275a 100644
--- a/skgbasemodeler/skgdocument.cpp
+++ b/skgbasemodeler/skgdocument.cpp
@@ -854,7 +854,8 @@ QStringList SKGDocument::getImpactedViews(const QString& iTable)
             for (int i = 0; i < l.count(); ++i) {  // Warning: the size of l will change in the loop
                 QString item = l.at(i);
                 if (m_ImpactedViews.contains(item)) {
-                    for (const auto& name : qAsConst(m_ImpactedViews.value(item)))
+                    QStringList impactedView = m_ImpactedViews.value(item);
+                    for (const auto& name : qAsConst(impactedView))
                         if (!l.contains(name)) {
                             l.push_back(name);
                         }
diff --git a/skgsqlcipher/qsql_sqlite.cpp b/skgsqlcipher/qsql_sqlite.cpp
index 482cd35..ee1fcf6 100644
--- a/skgsqlcipher/qsql_sqlite.cpp
+++ b/skgsqlcipher/qsql_sqlite.cpp
@@ -130,7 +130,10 @@ protected:
     void virtual_hook(int id, void* data) Q_DECL_OVERRIDE;
 
 private:
-    QSQLiteResultPrivate* d;
+#if QT_VERSION < QT_VERSION_CHECK(5, 7, 0)
+    QSQLiteResultPrivate* d_ptr;
+#endif
+    Q_DECLARE_PRIVATE(QSQLiteResult)
 };
 
 class QSQLiteDriverPrivate : public QSqlDriverPrivate
@@ -145,17 +148,25 @@ public:
 };
 
 
+#if QT_VERSION >= QT_VERSION_CHECK(5, 7, 0)
+class QSQLiteResultPrivate : public QSqlCachedResultPrivate
+#else
 class QSQLiteResultPrivate
+#endif
 {
 public:
-    QSQLiteResultPrivate(QSQLiteResult* res);
+#if QT_VERSION >= QT_VERSION_CHECK(5, 7, 0)
+    QSQLiteResultPrivate(QSQLiteResult *res, const QSQLiteDriver *drv);
+#else
+    QSQLiteResultPrivate(QSQLiteResult *res);
+    QSQLiteResult* q_ptr;
+#endif
     void cleanup();
     bool fetchNext(QSqlCachedResult::ValueCache& values, int idx, bool initialFetch);
     // initializes the recordInfo and the cache
     void initColumns(bool emptyResultset);
     void finalize();
 
-    QSQLiteResult* q;
     sqlite3* access;
 
     sqlite3_stmt* stmt;
@@ -164,15 +175,27 @@ public:
     bool skipRow; // skip the next fetchNext()?
     QSqlRecord rInf;
     QVector<QVariant> firstRow;
+
+    Q_DECLARE_PUBLIC(QSQLiteResult)
 };
 
-QSQLiteResultPrivate::QSQLiteResultPrivate(QSQLiteResult* res) : q(res), access(0),
-    stmt(0), skippedStatus(false), skipRow(false)
+#if QT_VERSION >= QT_VERSION_CHECK(5, 7, 0)
+QSQLiteResultPrivate::QSQLiteResultPrivate(QSQLiteResult *res, const QSQLiteDriver *drv)
+    : QSqlCachedResultPrivate(res, drv)
+#else
+QSQLiteResultPrivate::QSQLiteResultPrivate(QSQLiteResult* res)
+    : q_ptr(res)
+#endif
+    , access(0)
+    , stmt(0)
+    , skippedStatus(false)
+    , skipRow(false)
 {
 }
 
 void QSQLiteResultPrivate::cleanup()
 {
+    Q_Q(QSQLiteResult);
     finalize();
     rInf.clear();
     skippedStatus = false;
@@ -194,6 +217,7 @@ void QSQLiteResultPrivate::finalize()
 
 void QSQLiteResultPrivate::initColumns(bool emptyResultset)
 {
+    Q_Q(QSQLiteResult);
     int nCols = sqlite3_column_count(stmt);
     if (nCols <= 0) {
         return;
@@ -246,6 +270,8 @@ void QSQLiteResultPrivate::initColumns(bool emptyResultset)
 
 bool QSQLiteResultPrivate::fetchNext(QSqlCachedResult::ValueCache& values, int idx, bool initialFetch)
 {
+    Q_Q(QSQLiteResult);
+
     int res;
     int i;
 
@@ -352,21 +378,29 @@ bool QSQLiteResultPrivate::fetchNext(QSqlCachedResult::ValueCache& values, int i
 }
 
 QSQLiteResult::QSQLiteResult(const QSQLiteDriver* db)
+#if QT_VERSION >= QT_VERSION_CHECK(5, 7, 0)
+    : QSqlCachedResult(*new QSQLiteResultPrivate(this, db))
+#else
     : QSqlCachedResult(db)
+    , d_ptr(new QSQLiteResultPrivate(this))
+#endif
 {
-    d = new QSQLiteResultPrivate(this);
+    Q_D(QSQLiteResult);
     d->access = db->d_func()->access;
     const_cast<QSQLiteDriverPrivate*>(db->d_func())->results.append(this);
 }
 
 QSQLiteResult::~QSQLiteResult()
 {
+    Q_D(QSQLiteResult);
     const QSqlDriver* sqlDriver = driver();
     if (sqlDriver) {
         const_cast<QSQLiteDriverPrivate*>(qobject_cast<const QSQLiteDriver*>(sqlDriver)->d_func())->results.removeOne(this);
     }
     d->cleanup();
+#if QT_VERSION < QT_VERSION_CHECK(5, 7, 0)
     delete d;
+#endif
 }
 
 void QSQLiteResult::virtual_hook(int id, void* data)
@@ -384,6 +418,7 @@ bool QSQLiteResult::reset(const QString& query)
 
 bool QSQLiteResult::prepare(const QString& query)
 {
+    Q_D(QSQLiteResult);
     if (!driver() || !driver()->isOpen() || driver()->isOpenError()) {
         return false;
     }
@@ -418,6 +453,7 @@ bool QSQLiteResult::prepare(const QString& query)
 
 bool QSQLiteResult::exec()
 {
+    Q_D(QSQLiteResult);
     const QVector<QVariant> values = boundValues();
 
     d->skippedStatus = false;
@@ -515,7 +551,7 @@ bool QSQLiteResult::exec()
 
 bool QSQLiteResult::gotoNext(QSqlCachedResult::ValueCache& row, int idx)
 {
-    return d->fetchNext(row, idx, false);
+    return d_func()->fetchNext(row, idx, false);
 }
 
 int QSQLiteResult::size()
@@ -525,13 +561,13 @@ int QSQLiteResult::size()
 
 int QSQLiteResult::numRowsAffected()
 {
-    return sqlite3_changes(d->access);
+    return sqlite3_changes(d_func()->access);
 }
 
 QVariant QSQLiteResult::lastInsertId() const
 {
     if (isActive()) {
-        qint64 id = sqlite3_last_insert_rowid(d->access);
+        qint64 id = sqlite3_last_insert_rowid(d_func()->access);
         if (id) {
             return id;
         }
@@ -544,19 +580,19 @@ QSqlRecord QSQLiteResult::record() const
     if (!isActive() || !isSelect()) {
         return QSqlRecord();
     }
-    return d->rInf;
+    return d_func()->rInf;
 }
 
 void QSQLiteResult::detachFromResultSet()
 {
-    if (d->stmt) {
-        sqlite3_reset(d->stmt);
+    if (d_func()->stmt) {
+        sqlite3_reset(d_func()->stmt);
     }
 }
 
 QVariant QSQLiteResult::handle() const
 {
-    return QVariant::fromValue(d->stmt);
+    return QVariant::fromValue(d_func()->stmt);
 }
 
 /////////////////////////////////////////////////////////
@@ -668,7 +704,7 @@ void QSQLiteDriver::close()
     Q_D(QSQLiteDriver);
     if (isOpen()) {
         foreach (QSQLiteResult* result, d->results) {
-            result->d->finalize();
+            result->d_func()->finalize();
         }
 
         if (sqlite3_close(d->access) != SQLITE_OK)