Make clang-11 ready

src/sql/CreateStatement.h

@@ -30,7 +30,7 @@ namespace hsql {
   // Example: "CREATE TABLE students (name TEXT, student_number INTEGER, city TEXT, grade DOUBLE)"
   struct CreateStatement : SQLStatement {
     CreateStatement(CreateType type);
-    virtual ~CreateStatement();
+    ~CreateStatement() override;
 
     CreateType type;
     bool ifNotExists; // default: false

src/sql/DeleteStatement.h

@@ -11,7 +11,7 @@ namespace hsql {
   // Note: if (expr == nullptr) => delete all rows (truncate)
   struct DeleteStatement : SQLStatement {
     DeleteStatement();
-    virtual ~DeleteStatement();
+    ~DeleteStatement() override;
 
     char* schema;
     char* tableName;

src/sql/DropStatement.h

@@ -19,7 +19,7 @@ namespace hsql {
   struct DropStatement : SQLStatement {
 
     DropStatement(DropType type);
-    virtual ~DropStatement();
+    ~DropStatement() override;
 
     DropType type;
     bool ifExists;

src/sql/ExecuteStatement.h

@@ -9,7 +9,7 @@ namespace hsql {
   // Example: "EXECUTE ins_prep(100, "test", 2.3);"
   struct ExecuteStatement : SQLStatement {
     ExecuteStatement();
-    virtual ~ExecuteStatement();
+    ~ExecuteStatement() override;
 
     char* name;
     std::vector<Expr*>* parameters;

src/sql/ExportStatement.h

@@ -8,7 +8,7 @@ namespace hsql {
   // Represents SQL Export statements.
   struct ExportStatement : SQLStatement {
     ExportStatement(ImportType type);
-    virtual ~ExportStatement();
+    ~ExportStatement() override;
 
     // ImportType is used for compatibility reasons
     ImportType type;

src/sql/ImportStatement.h

@@ -14,7 +14,7 @@ namespace hsql {
   // Represents SQL Import statements.
   struct ImportStatement : SQLStatement {
     ImportStatement(ImportType type);
-    virtual ~ImportStatement();
+    ~ImportStatement() override;
 
     ImportType type;
     char* filePath;

src/sql/InsertStatement.h

@@ -14,7 +14,7 @@ namespace hsql {
   // Example: "INSERT INTO students VALUES ('Max', 1112233, 'Musterhausen', 2.3)"
   struct InsertStatement : SQLStatement {
     InsertStatement(InsertType type);
-    virtual ~InsertStatement();
+    ~InsertStatement() override;
 
     InsertType type;
     char* schema;

src/sql/PrepareStatement.h

@@ -9,7 +9,7 @@ namespace hsql {
   // Example: PREPARE test FROM 'SELECT * FROM test WHERE a = ?;'
   struct PrepareStatement : SQLStatement {
     PrepareStatement();
-    virtual ~PrepareStatement();
+    ~PrepareStatement() override;
 
     char* name;
 

src/sql/SelectStatement.h

@@ -67,7 +67,7 @@ namespace hsql {
   // Representation of a full SQL select statement.
   struct SelectStatement : SQLStatement {
     SelectStatement();
-    virtual ~SelectStatement();
+    ~SelectStatement() override;
 
     TableRef* fromTable;
     bool selectDistinct;

src/sql/ShowStatement.h

@@ -16,7 +16,7 @@ namespace hsql {
   struct ShowStatement : SQLStatement {
 
     ShowStatement(ShowType type);
-    virtual ~ShowStatement();
+    ~ShowStatement() override;
 
     ShowType type;
     char* schema;

src/sql/TransactionStatement.h

@@ -15,7 +15,7 @@ namespace hsql {
 
   struct TransactionStatement : SQLStatement {
     TransactionStatement(TransactionCommand command);
-    virtual ~TransactionStatement();
+    ~TransactionStatement() override;
 
     TransactionCommand command;
   };

src/sql/UpdateStatement.h

@@ -14,7 +14,7 @@ namespace hsql {
   // Represents SQL Update statements.
   struct UpdateStatement : SQLStatement {
     UpdateStatement();
-    virtual ~UpdateStatement();
+    ~UpdateStatement() override;
 
     // TODO: switch to char* instead of TableRef
     TableRef* table;