query_classifier.cc:cleaned up some intendentions and brackets.

dbshard.h:removed unnecessary code
dbshard.c:removed unnecessary code, cleaned up a bit and made some required changes
readwritesplit.c:removed two unnecessary variable assignments.

query_classifier/query_classifier.cc

@@ -1441,47 +1441,55 @@ char* skygw_get_qtype_str(
 
 /**
  * Returns an array of strings of databases that this query uses.
- * If the database isn't defined in the query, it is assumed that this query only targets the current database.
- * The value of @p size is set to the number of allocated strings. The caller is responsible for freeing all the allocated memory.
+ * If the database isn't defined in the query, it is assumed that this query 
+ * only targets the current database.
+ * The value of @p size is set to the number of allocated strings. The caller is 
+ * responsible for freeing all the allocated memory.
  * @param querybuf GWBUF containing the query
  * @param size Size of the resulting array
- * @return A new array of strings containing the database names or NULL if no databases were found.
+ * @return A new array of strings containing the database names or NULL if no 
+ * databases were found.
  */
-char**		skygw_get_database_names(GWBUF* querybuf,int* size)
+char** skygw_get_database_names(GWBUF* querybuf,int* size)
 {
 	LEX*			lex;
 	TABLE_LIST*		tbl;
 	char			**databases = NULL, **tmp = NULL;
-	int				currsz = 0,i = 0;
+	int			currsz = 0,i = 0;
 
-  if( (lex = get_lex(querybuf)) == NULL)
+	if( (lex = get_lex(querybuf)) == NULL)
 	{
-      goto retblock;
-    }        
+		goto retblock;
+	}
 
 	lex->current_select = lex->all_selects_list;
 
-
-  while(lex->current_select){
-	  tbl = lex->current_select->join_list->head();
-	while(tbl)
+	while(lex->current_select)
+	{
+		tbl = lex->current_select->join_list->head();
+		while(tbl)
 		{
-			if(strcmp(tbl->db,"skygw_virtual") != 0){
-				if(i>= currsz){
-					tmp = (char**)realloc(databases,sizeof(char*)*(currsz*2 + 1));
-					if(tmp == NULL) goto retblock;
+			if(strcmp(tbl->db,"skygw_virtual") != 0)
+			{
+				if(i>= currsz)
+				{
+					tmp = (char**)realloc(databases,
+							      sizeof(char*)*(currsz*2 + 1));
+					if(tmp == NULL) 
+					{
+						goto retblock;
+					}
 					databases = tmp;
 					currsz = currsz*2 + 1;
-				}				
+				}
 				databases[i++] = strdup(tbl->db);
 			}
 			tbl=tbl->next_local;
 		}
-	  
-    lex->current_select = lex->current_select->next_select_in_list();
-  }
+		lex->current_select = lex->current_select->next_select_in_list();
+	}
 
-	retblock:
+retblock:
 	*size = i;
 	return databases;
 }

server/modules/include/dbshard.h

@@ -75,15 +75,16 @@ struct router_instance;
 
 typedef enum {
 	TARGET_UNDEFINED    = 0x00,
-        TARGET_SINGLE       = 0x01,
-        TARGET_ALL          = 0x02
+	TARGET_MASTER       = 0x01,
+	TARGET_SLAVE        = 0x02,
+	TARGET_NAMED_SERVER = 0x04,
+	TARGET_ALL          = 0x08,
+	TARGET_RLAG_MAX     = 0x10
 } route_target_t;
 
-#define TARGET_IS_MASTER(t)       (t & TARGET_MASTER)
-#define TARGET_IS_SLAVE(t)        (t & TARGET_SLAVE)
+
 #define TARGET_IS_NAMED_SERVER(t) (t & TARGET_NAMED_SERVER)
 #define TARGET_IS_ALL(t)          (t & TARGET_ALL)
-#define TARGET_IS_RLAG_MAX(t)     (t & TARGET_RLAG_MAX)
 
 typedef struct rses_property_st rses_property_t;
 typedef struct router_client_session ROUTER_CLIENT_SES;
@@ -97,24 +98,6 @@ typedef enum rses_property_type_t {
 	RSES_PROP_TYPE_COUNT=RSES_PROP_TYPE_LAST+1
 } rses_property_type_t;
 
-
-
-/**
- * This criteria is used when backends are chosen for a router session's use.
- * Backend servers are sorted to ascending order according to the criteria
- * and top N are chosen.
- */
-typedef enum select_criteria {
-        UNDEFINED_CRITERIA=0,
-        LEAST_GLOBAL_CONNECTIONS, /*< all connections established by MaxScale */
-        LEAST_ROUTER_CONNECTIONS, /*< connections established by this router */
-        LEAST_BEHIND_MASTER,
-        LEAST_CURRENT_OPERATIONS,
-        DEFAULT_CRITERIA=LEAST_CURRENT_OPERATIONS,
-        LAST_CRITERIA /*< not used except for an index */
-} select_criteria_t;
-
-
 /** default values for rwsplit configuration parameters */
 #define CONFIG_MAX_SLAVE_CONN 1
 #define CONFIG_MAX_SLAVE_RLAG -1 /*< not used */
@@ -229,11 +212,9 @@ typedef struct backend_ref_st {
 } backend_ref_t;
 
 
-typedef struct rwsplit_config_st {
+typedef struct dbshard_config_st {
         int               rw_max_slave_conn_percent;
         int               rw_max_slave_conn_count;
-        select_criteria_t rw_slave_select_criteria;
-        int               rw_max_slave_replication_lag;
 	target_t          rw_use_sql_variables_in;	
 } rwsplit_config_t;
      

server/modules/routing/readwritesplit/readwritesplit.c

@@ -3220,8 +3220,6 @@ static bool select_connect_backend_servers(
                                 atomic_add(&backend_ref[i].bref_backend->backend_conn_count, -1);
                         }
                 }
-                master_connected = false;
-                slaves_connected = 0;
         }
 return_succp: