diff --git a/src/FilterLineEdit.cpp b/src/FilterLineEdit.cpp
index 63ed1239..dc969bc8 100644
--- a/src/FilterLineEdit.cpp
+++ b/src/FilterLineEdit.cpp
@@ -6,7 +6,11 @@
 #include <QMenu>
 #include <QWhatsThis>
 
-FilterLineEdit::FilterLineEdit(QWidget* parent, std::vector<FilterLineEdit*>* filters, size_t columnnum) : QLineEdit(parent), filterList(filters), columnNumber(columnnum)
+FilterLineEdit::FilterLineEdit(QWidget* parent, std::vector<FilterLineEdit*>* filters, size_t columnnum) :
+    QLineEdit(parent),
+    filterList(filters),
+    columnNumber(columnnum),
+    no_conditional_format(true)
 {
     setPlaceholderText(tr("Filter"));
     setClearButtonEnabled(true);
diff --git a/src/FindReplaceDialog.cpp b/src/FindReplaceDialog.cpp
index 18a9c05f..4279b3f8 100644
--- a/src/FindReplaceDialog.cpp
+++ b/src/FindReplaceDialog.cpp
@@ -7,6 +7,7 @@
 FindReplaceDialog::FindReplaceDialog(QWidget* parent)
     : QDialog(parent),
       ui(new Ui::FindReplaceDialog),
+      m_scintilla(nullptr),
       foundIndicatorNumber(0),
       findInProgress(false)
 {
diff --git a/src/TableBrowser.cpp b/src/TableBrowser.cpp
index 05b244cf..7b55ccd4 100644
--- a/src/TableBrowser.cpp
+++ b/src/TableBrowser.cpp
@@ -328,8 +328,7 @@ void TableBrowser::init(DBBrowserDB* _db)
 void TableBrowser::reset()
 {
     // Reset the model
-    if(m_model)
-        m_model->reset();
+    m_model->reset();
 
     // Remove all stored table information browse data tab
     m_settings.clear();
diff --git a/src/sql/sqlitetypes.h b/src/sql/sqlitetypes.h
index b9a17565..ea12158c 100644
--- a/src/sql/sqlitetypes.h
+++ b/src/sql/sqlitetypes.h
@@ -437,7 +437,10 @@ private:
 class IndexedColumn
 {
 public:
-    IndexedColumn() {}
+    IndexedColumn()
+        : m_isExpression(false)
+    {
+    }
 
     IndexedColumn(const std::string& name, bool expr, const std::string& order = std::string())
         : m_name(name),
diff --git a/src/sqlitedb.cpp b/src/sqlitedb.cpp
index ef53c4bb..c625479f 100644
--- a/src/sqlitedb.cpp
+++ b/src/sqlitedb.cpp
@@ -1050,12 +1050,11 @@ bool DBBrowserDB::executeMultiSQL(QByteArray query, bool dirty, bool log)
     const char * const tail_start = tail;
     const char * const tail_end = tail + query.size() + 1;
     size_t total_tail_length = static_cast<size_t>(tail_end - tail_start);
-    int res = SQLITE_OK;
     unsigned int line = 0;
     bool structure_updated = false;
     int last_progress_value = -1;
     std::string savepoint_name;
-    while(tail && *tail != 0 && (res == SQLITE_OK || res == SQLITE_DONE))
+    while(tail && *tail != 0)
     {
         line++;
 
@@ -1122,8 +1121,7 @@ bool DBBrowserDB::executeMultiSQL(QByteArray query, bool dirty, bool log)
         }
 
         // Execute next statement
-        res = sqlite3_prepare_v2(_db, tail, static_cast<int>(tail_end - tail + 1), &vm, &tail);
-        if(res == SQLITE_OK)
+        if(sqlite3_prepare_v2(_db, tail, static_cast<int>(tail_end - tail + 1), &vm, &tail) == SQLITE_OK)
         {
             switch(sqlite3_step(vm))
             {
diff --git a/src/sqlitetablemodel.cpp b/src/sqlitetablemodel.cpp
index f06482e4..db01ebbb 100644
--- a/src/sqlitetablemodel.cpp
+++ b/src/sqlitetablemodel.cpp
@@ -419,8 +419,8 @@ QVariant SqliteTableModel::data(const QModelIndex &index, int role) const
         if(m_imagePreviewEnabled && !isImageData(data).isNull())
         {
             QImage img;
-            img.loadFromData(data);
-            return QPixmap::fromImage(img);
+            if(img.loadFromData(data))
+                return QPixmap::fromImage(img);
         }
     }
 
@@ -796,16 +796,17 @@ std::vector<std::string> SqliteTableModel::getColumns(std::shared_ptr<sqlite3> p
         pDb = m_db.get(tr("retrieving list of columns"));
 
     sqlite3_stmt* stmt;
-    int status = sqlite3_prepare_v2(pDb.get(), sQuery.c_str(), static_cast<int>(sQuery.size()), &stmt, nullptr);
     std::vector<std::string> listColumns;
-    if(SQLITE_OK == status)
+    if(sqlite3_prepare_v2(pDb.get(), sQuery.c_str(), static_cast<int>(sQuery.size()), &stmt, nullptr) == SQLITE_OK)
     {
-        sqlite3_step(stmt);
-        int columns = sqlite3_data_count(stmt);
-        for(int i = 0; i < columns; ++i)
+        if(sqlite3_step(stmt) == SQLITE_ROW)
         {
-            listColumns.push_back(sqlite3_column_name(stmt, i));
-            fieldsTypes.push_back(sqlite3_column_type(stmt, i));
+            int columns = sqlite3_data_count(stmt);
+            for(int i = 0; i < columns; ++i)
+            {
+                listColumns.push_back(sqlite3_column_name(stmt, i));
+                fieldsTypes.push_back(sqlite3_column_type(stmt, i));
+            }
         }
     }
     sqlite3_finalize(stmt);