Removed DB specific get api's from Selectable class

common/redisselect.cpp

@@ -16,14 +16,10 @@ int RedisSelect::getFd()
 {
     return m_subscribe->getContext()->fd;
 }
-int RedisSelect::getDbConnectorId()
-{
-    return m_subscribe->getDbId();
-}
 
-std::string RedisSelect::getDbNamespace()
+const DBConnector* RedisSelect::getDbConnector() const
 {
-    return m_subscribe->getNamespace();
+    return m_subscribe.get();
 }
 
 uint64_t RedisSelect::readData()

common/redisselect.h

@@ -20,8 +20,7 @@ class RedisSelect : public Selectable
     bool hasCachedData() override;
     bool initializedWithData() override;
     void updateAfterRead() override;
-    int getDbConnectorId() override;
-    std::string getDbNamespace() override;
+    const DBConnector* getDbConnector() const;
 
     /* Create a new redisContext, SELECT DB and SUBSCRIBE */
     void subscribe(DBConnector* db, const std::string &channelName);

common/selectable.h

@@ -58,16 +58,6 @@ class Selectable
         return m_priority;
     }
 
-    virtual int getDbConnectorId()
-    {
-        return 0;
-    }
-
-    virtual std::string getDbNamespace()
-    {
-        return std::string();
-    }
-
 private:
 
     friend class Select;

pyext/swsscommon.i

@@ -35,6 +35,7 @@
 %typemap(in, numinputs=0) swss::Selectable ** (swss::Selectable *temp) {
     $1 = &temp;
 }
+
 %typemap(argout) swss::Selectable ** {
     PyObject* temp = NULL;
     if (!PyList_Check($result)) {
@@ -45,6 +46,13 @@
     temp = SWIG_NewPointerObj(*$1, SWIGTYPE_p_swss__Selectable, 0);
     SWIG_Python_AppendOutput($result, temp);
 }
+
+%inline %{
+swss::RedisSelect *CastSelectableToRedisSelectObj(swss::Selectable *temp) {
+  return dynamic_cast<swss::RedisSelect *>(temp);
+}
+%}
+
 %include "schema.h"
 %include "dbconnector.h"
 %include "selectable.h"