feat(Cmake/Database): separate database lib from common (#5334)

* feat(Core/Database): separate databse lib from common

* 1

src/server/database/Database/SQLOperation.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>
+ * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
+ * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
+ */
+
+#ifndef _SQLOPERATION_H
+#define _SQLOPERATION_H
+
+#include <ace/Method_Request.h>
+#include <ace/Activation_Queue.h>
+
+#include "QueryResult.h"
+
+//- Forward declare (don't include header to prevent circular includes)
+class PreparedStatement;
+
+//- Union that holds element data
+union SQLElementUnion
+{
+    PreparedStatement* stmt;
+    const char* query;
+};
+
+//- Type specifier of our element data
+enum SQLElementDataType
+{
+    SQL_ELEMENT_RAW,
+    SQL_ELEMENT_PREPARED
+};
+
+//- The element
+struct SQLElementData
+{
+    SQLElementUnion element;
+    SQLElementDataType type;
+};
+
+//- For ambigious resultsets
+union SQLResultSetUnion
+{
+    PreparedResultSet* presult;
+    ResultSet* qresult;
+};
+
+class MySQLConnection;
+
+class SQLOperation : public ACE_Method_Request
+{
+public:
+    SQLOperation(): m_conn(nullptr) { }
+    int call() override
+    {
+        Execute();
+        return 0;
+    }
+    virtual bool Execute() = 0;
+    virtual void SetConnection(MySQLConnection* con) { m_conn = con; }
+
+    MySQLConnection* m_conn;
+};
+
+#endif