diff --git a/src/entry/Maat_api.cpp b/src/entry/Maat_api.cpp
index 0debece..95088c0 100644
--- a/src/entry/Maat_api.cpp
+++ b/src/entry/Maat_api.cpp
@@ -1135,7 +1135,7 @@ MAAT_PLUGIN_EX_DATA Maat_plugin_get_EX_data(Maat_feather_t feather, int table_id
 	{
 		return NULL;
 	}
-	table_desc=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, TABLE_TYPE_PLUGIN, NULL);
+	table_desc=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, SCAN_TYPE_PLUGIN, NULL);
 	table_rt=Maat_table_runtime_get(_feather->scanner->table_rt_mgr, table_id);
 	exdata=Maat_table_runtime_plugin_get_ex_data(table_rt, table_desc, key);
 
@@ -1227,7 +1227,7 @@ int Maat_ip_plugin_get_EX_data(Maat_feather_t feather, int table_id, const struc
 		return 0;
 	}
 
-	table_schema=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, TABLE_TYPE_IP_PLUGIN, NULL);
+	table_schema=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, SCAN_TYPE_IP_PLUGIN, NULL);
 	table_rt=Maat_table_runtime_get(_feather->scanner->table_rt_mgr, table_id);
 	if(table_rt->table_type!=TABLE_TYPE_IP_PLUGIN)
 	{
@@ -1273,7 +1273,7 @@ int Maat_fqdn_plugin_get_EX_data(Maat_feather_t feather, int table_id, const cha
 	{
 		return 0;
 	}
-	table_schema=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, TABLE_TYPE_FQDN_PLUGIN, NULL);
+	table_schema=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, SCAN_TYPE_FQDN_PLUGIN, NULL);
 	table_rt=Maat_table_runtime_get(_feather->scanner->table_rt_mgr, table_id);
 	if(table_rt->table_type!=TABLE_TYPE_FQDN_PLUGIN)
 	{
@@ -1328,7 +1328,7 @@ int Maat_full_scan_string_detail(Maat_feather_t feather,int table_id
 		return 0;
 	}
 
-	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, TABLE_TYPE_EXPR, &virtual_table_id);
+	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, SCAN_TYPE_STRING, &virtual_table_id);
 	if(p_table==NULL)
 	{
 		_feather->scan_err_cnt++;
@@ -1466,7 +1466,7 @@ int Maat_scan_intval(Maat_feather_t feather,int table_id
 	_mid->scan_cnt++;
 
 	int virtual_table_id=0;
-	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, TABLE_TYPE_INTERVAL, &virtual_table_id);
+	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, SCAN_TYPE_INTERVAL, &virtual_table_id);
 	if(p_table==NULL)
 	{
 		_feather->scan_err_cnt++;
@@ -1568,7 +1568,7 @@ int Maat_similar_scan_string(Maat_feather_t feather,int table_id
 	_mid->scan_cnt++;
 	
 	int virtual_table_id=0;
-	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, TABLE_TYPE_SIMILARITY, &virtual_table_id);
+	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, SCAN_TYPE_STRING, &virtual_table_id);
 	if(p_table==NULL)
 	{
 		_feather->scan_err_cnt++;
@@ -1632,7 +1632,7 @@ int Maat_similar_scan_string(Maat_feather_t feather,int table_id
 	return compile_ret;
 
 }
-static int ip_scan_data_set(scan_data_t* scan_data, const struct ipaddr* addr, unsigned short int proto, enum MAAT_TABLE_CHILD_TYPE child_type, int table_id)
+static int ip_scan_data_set(scan_data_t* scan_data, const struct ipaddr* addr, unsigned short int proto, enum MAAT_TABLE_COMPONENT_TYPE child_type, int table_id)
 {
 	memset(scan_data, 0, sizeof(scan_data_t));
 	scan_data->sub_type=make_sub_type(table_id, CHARSET_NONE, 0);
@@ -1643,15 +1643,15 @@ static int ip_scan_data_set(scan_data_t* scan_data, const struct ipaddr* addr, u
 			scan_data->ipv4_data.proto=proto;
 			switch(child_type)
 			{
-				case CHILD_TABLE_TYPE_SOURCE_IP:
+				case COMPONENT_TABLE_TYPE_SOURCE_IP:
 					scan_data->ipv4_data.saddr=ntohl(addr->v4->saddr);
 					scan_data->ipv4_data.sport=ntohs(addr->v4->source);
 					break;
-				case CHILD_TABLE_TYPE_DESTINATION_IP:
+				case COMPONENT_TABLE_TYPE_DESTINATION_IP:
 					scan_data->ipv4_data.saddr=ntohl(addr->v4->daddr);
 					scan_data->ipv4_data.sport=ntohs(addr->v4->dest);
 					break;
-				case CHILD_TABLE_TYPE_SESSION:
+				case COMPONENT_TABLE_TYPE_SESSION:
 					scan_data->ipv4_data.saddr=ntohl(addr->v4->saddr);
 					scan_data->ipv4_data.sport=ntohs(addr->v4->source);
 					scan_data->ipv4_data.daddr=ntohl(addr->v4->daddr);
@@ -1667,17 +1667,17 @@ static int ip_scan_data_set(scan_data_t* scan_data, const struct ipaddr* addr, u
 			scan_data->ipv6_data.proto=proto;
 			switch(child_type)
 			{
-				case CHILD_TABLE_TYPE_SOURCE_IP:
+				case COMPONENT_TABLE_TYPE_SOURCE_IP:
 					memcpy(scan_data->ipv6_data.saddr, addr->v6->saddr, sizeof(scan_data->ipv6_data.saddr));
 					ipv6_ntoh(scan_data->ipv6_data.saddr);
 					scan_data->ipv6_data.sport=ntohs(addr->v6->source);
 					break;
-				case CHILD_TABLE_TYPE_DESTINATION_IP:
+				case COMPONENT_TABLE_TYPE_DESTINATION_IP:
 					memcpy(scan_data->ipv6_data.saddr, addr->v6->daddr, sizeof(scan_data->ipv6_data.saddr));
 					ipv6_ntoh(scan_data->ipv6_data.saddr);
 					scan_data->ipv6_data.sport=ntohs(addr->v6->dest);
 					break;
-				case CHILD_TABLE_TYPE_SESSION:
+				case COMPONENT_TABLE_TYPE_SESSION:
 					memcpy(scan_data->ipv6_data.saddr, addr->v6->saddr, sizeof(scan_data->ipv6_data.saddr));
 					ipv6_ntoh(scan_data->ipv6_data.saddr);
 					scan_data->ipv6_data.sport=ntohs(addr->v6->source);
@@ -1697,7 +1697,7 @@ static int ip_scan_data_set(scan_data_t* scan_data, const struct ipaddr* addr, u
 	}
 	return 0;
 }
-static int IP_composition_scan(const struct ipaddr* addr, unsigned short int proto, Maat_table_schema* parent_table, enum MAAT_TABLE_CHILD_TYPE child_type,
+static int IP_composition_scan(const struct ipaddr* addr, unsigned short int proto, int parent_table_id, enum MAAT_TABLE_COMPONENT_TYPE child_type,
 						scan_result_t *region_result, unsigned int result_num,
 						int* virtual_table_id,
 						rule_scanner_t ip_scanner, struct Maat_table_manager* table_mgr, struct Maat_table_runtime_manager* table_rt_mgr,
@@ -1705,21 +1705,21 @@ static int IP_composition_scan(const struct ipaddr* addr, unsigned short int pro
 {
 	int child_table_id=0;
 
-	if(child_type==CHILD_TABLE_TYPE_NONE)
+	if(child_type==COMPONENT_TABLE_TYPE_NONE)
 	{
-		child_table_id=parent_table->table_id;
-		child_type=CHILD_TABLE_TYPE_SESSION;
+		child_table_id=parent_table_id;
+		child_type=COMPONENT_TABLE_TYPE_SESSION;
 	}
 	else
 	{
-		child_table_id=Maat_table_get_child_id(parent_table, child_type);
+		child_table_id=Maat_table_get_child_id(table_mgr, parent_table_id, child_type);
 	}
 	if(child_table_id<0)
 	{
 		return 0;
 	}
 
-	Maat_table_schema* real_table=Maat_table_get_scan_by_id(table_mgr, child_table_id, TABLE_TYPE_IP, virtual_table_id);
+	Maat_table_schema* real_table=Maat_table_get_scan_by_id(table_mgr, child_table_id, SCAN_TYPE_IP, virtual_table_id);
 	if(real_table==NULL)
 	{
 		return 0;
@@ -1760,7 +1760,6 @@ int Maat_scan_proto_addr(Maat_feather_t feather,int table_id
 	int region_ret=0, compile_ret=0;
 	struct _OUTER_scan_status_t* _mid=NULL;
 	scan_result_t *region_result=NULL;
-	Maat_table_schema* p_table=NULL;
 	struct _Maat_feather_t* _feather=(_Maat_feather_t*)feather;
 	struct Maat_scanner* my_scanner=NULL;
 	struct timespec start,end;
@@ -1771,8 +1770,9 @@ int Maat_scan_proto_addr(Maat_feather_t feather,int table_id
 	_mid=grab_mid(mid, _feather, thread_num, 0);
 	_mid->scan_cnt++;
 	int virtual_table_id=0;
-	p_table=Maat_table_get_by_id_raw(_feather->table_mgr, table_id);
-	if(p_table==NULL)
+	enum MAAT_TABLE_TYPE table_type=TABLE_TYPE_INVALID;
+	table_type=Maat_table_get_type_by_id(_feather->table_mgr, table_id);
+	if(table_type==TABLE_TYPE_INVALID)
 	{
 		_feather->scan_err_cnt++;
 		return -1;
@@ -1791,12 +1791,12 @@ int Maat_scan_proto_addr(Maat_feather_t feather,int table_id
 	alignment_int64_array_add(_feather->thread_call_cnt, thread_num, 1);
 	INC_SCANNER_REF(my_scanner, thread_num);
 
-	if(p_table->table_type==TABLE_TYPE_COMPOSITION)
+	if(table_type==TABLE_TYPE_COMPOSITION)
 	{
-		enum MAAT_TABLE_CHILD_TYPE childs[3]={CHILD_TABLE_TYPE_SOURCE_IP, CHILD_TABLE_TYPE_DESTINATION_IP, CHILD_TABLE_TYPE_SESSION};
+		enum MAAT_TABLE_COMPONENT_TYPE childs[3]={COMPONENT_TABLE_TYPE_SOURCE_IP, COMPONENT_TABLE_TYPE_DESTINATION_IP, COMPONENT_TABLE_TYPE_SESSION};
 		for(int i=0; i<3; i++)
 		{
-			region_ret=IP_composition_scan(addr, proto, p_table, childs[i], 
+			region_ret=IP_composition_scan(addr, proto, table_id, childs[i], 
 								region_result+region_hit_cnt, MAX_SCANNER_HIT_NUM-region_hit_cnt, &virtual_table_id,
 								my_scanner->region, _feather->table_mgr, _feather->scanner->table_rt_mgr, thread_num);
 			if(region_ret<0)
@@ -1814,7 +1814,7 @@ int Maat_scan_proto_addr(Maat_feather_t feather,int table_id
 	}
 	else
 	{
-		region_ret=IP_composition_scan(addr, proto, p_table, CHILD_TABLE_TYPE_NONE, 
+		region_ret=IP_composition_scan(addr, proto, table_id, COMPONENT_TABLE_TYPE_NONE, 
 						region_result+region_hit_cnt, MAX_SCANNER_HIT_NUM-region_hit_cnt, &virtual_table_id,
 						my_scanner->region, _feather->table_mgr, _feather->scanner->table_rt_mgr, thread_num);
 		if(region_ret<0)
@@ -1834,7 +1834,7 @@ int Maat_scan_proto_addr(Maat_feather_t feather,int table_id
 		_mid=grab_mid(mid, _feather, thread_num, 1);
 		scan_region_hit_wraper_build_with_rulescan(&region_hit_wraper, region_result, region_hit_cnt,
 												_mid->is_last_region, virtual_table_id, _mid->scan_cnt);
-		if(p_table->table_type==TABLE_TYPE_COMPOSITION)
+		if(table_type==TABLE_TYPE_COMPOSITION)
 		{
 			region_hit_wraper.virtual_table_ids=region_rslt_virtual_table_id;
 		}
@@ -1884,7 +1884,7 @@ stream_para_t Maat_stream_scan_string_start(Maat_feather_t feather,int table_id,
 	struct Maat_table_schema *p_table=NULL;
 	int virtual_table_id=0;
 	assert(thread_num<_feather->scan_thread_num);
-	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, TABLE_TYPE_EXPR, &virtual_table_id);
+	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, SCAN_TYPE_STRING, &virtual_table_id);
 	if(p_table==NULL)
 	{
 		_feather->scan_err_cnt++;
@@ -2172,7 +2172,7 @@ stream_para_t Maat_stream_scan_digest_start(Maat_feather_t feather,int table_id,
 	sfh_instance_t * tmp_fuzzy_handle=NULL;
 	struct Maat_table_schema *p_table=NULL;
 	int virtual_table_id=0;
-	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, TABLE_TYPE_DIGEST, &virtual_table_id);
+	p_table=Maat_table_get_scan_by_id(_feather->table_mgr, table_id, SCAN_TYPE_STRING, &virtual_table_id);
 	if(p_table==NULL)
 	{
 		_feather->scan_err_cnt++;
diff --git a/src/entry/Maat_command.cpp b/src/entry/Maat_command.cpp
index 21655e6..02ce3ca 100644
--- a/src/entry/Maat_command.cpp
+++ b/src/entry/Maat_command.cpp
@@ -1625,6 +1625,7 @@ void redis_monitor_traverse(long        long version, struct source_redis_ctx* m
 	int update_type=CM_UPDATE_TYPE_INC;
 	long long new_version=0;
 	enum MAAT_TABLE_TYPE table_type;
+	enum MAAT_SCAN_TYPE scan_type;
 	struct Maat_table_schema* table_schema=NULL;
 	void* logger=feather->logger;
 
@@ -1714,7 +1715,9 @@ void redis_monitor_traverse(long        long version, struct source_redis_ctx* m
 		table_type=Maat_table_get_type_by_id(feather->table_mgr, table_id);
 		if(rule_list[i].op==MAAT_OP_DEL)
 		{
-			table_schema=Maat_table_get_scan_by_id(feather->table_mgr, table_id, table_type, NULL);
+			
+		 	scan_type=Maat_table_get_scan_type(table_type);
+			table_schema=Maat_table_get_scan_by_id(feather->table_mgr, table_id, scan_type, NULL);
 			valid_column=Maat_table_xx_plugin_table_get_valid_flag_column(table_schema);
 			ret=invalidate_line(rule_list[i].table_line, table_type, valid_column);
 			if(ret<0)
diff --git a/src/entry/Maat_rule.cpp b/src/entry/Maat_rule.cpp
index e099b03..6b01597 100644
--- a/src/entry/Maat_rule.cpp
+++ b/src/entry/Maat_rule.cpp
@@ -34,7 +34,7 @@
 #include "stream_fuzzy_hash.h"
 #include "gram_index_engine.h"
 
-int MAAT_FRAME_VERSION_3_0_20200919=1;
+int MAAT_FRAME_VERSION_3_0_20200927=1;
 
 int is_valid_table_name(const char* str)
 {
diff --git a/src/entry/Maat_table.cpp b/src/entry/Maat_table.cpp
index 098bdbf..552eb94 100644
--- a/src/entry/Maat_table.cpp
+++ b/src/entry/Maat_table.cpp
@@ -18,7 +18,45 @@ struct Maat_table_manager
 	MESA_htable_handle map_tablename2id;
 	int active_plugin_table_num;
 	int is_last_plugin_table_updating;
+	void* logger;
 };
+enum MAAT_SCAN_TYPE Maat_table_get_scan_type(enum MAAT_TABLE_TYPE table_type)
+{
+	enum MAAT_SCAN_TYPE ret=SCAN_TYPE_INVALID;
+	switch(table_type)
+	{
+		case TABLE_TYPE_EXPR:
+		case TABLE_TYPE_EXPR_PLUS:
+		case TABLE_TYPE_SIMILARITY:
+		case TABLE_TYPE_DIGEST:
+			ret=SCAN_TYPE_STRING;
+			break;
+		case TABLE_TYPE_INTERVAL:
+		case TABLE_TYPE_INTERVAL_PLUS:
+			ret=SCAN_TYPE_INTERVAL;
+			break;
+		case TABLE_TYPE_IP:
+		case TABLE_TYPE_IP_PLUS:
+		case TABLE_TYPE_COMPOSITION:
+			ret=SCAN_TYPE_IP;
+			break;
+		case TABLE_TYPE_PLUGIN:
+			ret=SCAN_TYPE_PLUGIN;
+			break;
+		case TABLE_TYPE_IP_PLUGIN:
+			ret=SCAN_TYPE_IP;
+			break;
+		case TABLE_TYPE_FQDN_PLUGIN:
+			ret=SCAN_TYPE_FQDN_PLUGIN;
+			break;
+		case TABLE_TYPE_COMPILE:			
+			ret=SCAN_TYPE_NONE;
+			break;
+		default:
+			break;
+	}
+	return ret;
+}
 
 int read_expr_table_info(const char* line, struct Maat_table_schema* table, MESA_htable_handle string2int_map)
 {
@@ -74,25 +112,7 @@ int read_expr_table_info(const char* line, struct Maat_table_schema* table, MESA
 	}
 	return 0;
 }
-int read_virtual_table_schema(const char* line, struct Maat_table_schema* table, MESA_htable_handle string2int_map)
-{
-	int ret=0;
-	char table_type[16];
-	ret=sscanf(line, "%d\t%s\t%s\t%s", &(table->table_id),
-									table->table_name[0],
-									table_type,
-									table->virtual_table.real_table_name);
-	if(ret!=4)
-	{
-		return -1;
-	}	
-	ret=map_str2int(string2int_map,str_tolower(table_type),(int*)&(table->table_type));
-	if(ret<0)
-	{
-		return -1;
-	}
-	return 0;
-}
+
 Maat_table_schema* table_info_new(void)
 {
 	struct Maat_table_schema*p=ALLOC(struct Maat_table_schema, 1);
@@ -121,6 +141,81 @@ int _read_integer_arrary(char* string, int *array, int size)
 #define COLUMN_IP_PLUGIN_SCHEMA_JSON	4
 #define COLUMN_FQDN_PLUGIN_SHCEMA_JSON	4
 #define COLUMN_COMPOSITION_SCHEMA_JSON	4
+#define	COLUMN_VIRUTAL_SCHEMA_JSON	4
+int read_virtual_table_schema(struct Maat_table_manager* table_mgr, const char* line, struct Maat_table_schema* table, MESA_htable_handle reserved_word_map)
+{
+	int ret=0, tmp_table_id=0;
+	enum MAAT_TABLE_TYPE physical_table_type=TABLE_TYPE_INVALID;
+	enum MAAT_SCAN_TYPE physical_table_scan_type=SCAN_TYPE_INVALID;
+	cJSON* json=NULL, *tmp=NULL;
+	char *json_str;
+
+	
+	size_t offset=0, len=0;
+	char* copy_line=NULL;
+	copy_line=_maat_strdup(line);
+	ret=get_column_pos(copy_line, COLUMN_VIRUTAL_SCHEMA_JSON, &offset, &len);
+	if(ret<0)
+	{
+		goto error_out;
+	}
+	if(offset+len<strlen(copy_line))
+	{
+		copy_line[offset+len]='\0';
+	}
+	json_str=copy_line+offset;
+	if(strchr(json_str,'{')||strchr(json_str,'['))//This is a json, mostly.
+	{
+		json=cJSON_Parse(json_str);
+		if(!json)
+		{
+			goto error_out;
+		}
+		if(json->type!=cJSON_Array)
+		{
+			goto error_out;
+		}
+		cJSON_ArrayForEach(tmp, json)
+		{
+			if(tmp->type!=cJSON_String)
+			{
+				goto error_out;
+			}
+			ret=map_str2int(table_mgr->map_tablename2id, tmp->valuestring, &tmp_table_id);
+			if(ret<0)
+			{
+				goto error_out;		
+			}
+			physical_table_type=table_mgr->p_table_info[tmp_table_id]->table_type;
+			physical_table_scan_type=Maat_table_get_scan_type(physical_table_type);
+			if(physical_table_scan_type<SCAN_TYPE_IP)
+			{
+				goto error_out;
+			}
+			table->virtual_table.physical_table_id[physical_table_scan_type]=tmp_table_id;
+		}		
+	}
+	else	//For compatible non-json physical description
+	{
+		ret=map_str2int(table_mgr->map_tablename2id, json_str, &tmp_table_id);
+		if(ret<0)
+		{
+			goto error_out;
+		}
+		physical_table_type=table_mgr->p_table_info[tmp_table_id]->table_type;
+		physical_table_scan_type=Maat_table_get_scan_type(physical_table_type);
+		table->virtual_table.physical_table_id[physical_table_scan_type]=tmp_table_id;
+	}
+	cJSON_Delete(json);
+	free(copy_line);
+	return 0;
+
+error_out:
+	if(json) cJSON_Delete(json);	
+	free(copy_line);
+	return -1;
+
+}
 
 int read_plugin_table_schema(const char* line, struct Maat_table_schema* p)
 {
@@ -137,7 +232,7 @@ int read_plugin_table_schema(const char* line, struct Maat_table_schema* p)
 	}
 	if(offset+len<strlen(copy_line))
 	{
-		copy_line[offset+len+1]='\0';
+		copy_line[offset+len]='\0';
 	}
 	plug_info=copy_line+offset;
 
@@ -215,7 +310,7 @@ int read_ip_plugin_table_schema(const char* line, struct Maat_table_schema* p)
 	}
 	if(offset+len<strlen(copy_line))
 	{
-		copy_line[offset+len+1]='\0';
+		copy_line[offset+len]='\0';
 	}
 	ip_plugin_info=copy_line+offset;
 
@@ -298,7 +393,7 @@ int read_fqdn_plugin_table_schema(const char* line, struct Maat_table_schema* p)
 	}
 	if(offset+len<strlen(copy_line))
 	{
-		copy_line[offset+len+1]='\0';
+		copy_line[offset+len]='\0';
 	}
 	fqnd_plugin_schema_json=copy_line+offset;
 
@@ -360,7 +455,7 @@ error_out:
 
 }
 
-int read_composition_table_schema(const char* line, struct Maat_table_schema* p, MESA_htable_handle string2int_map)
+int read_composition_table_schema(struct Maat_table_manager* table_mgr, const char* line, struct Maat_table_schema* p, MESA_htable_handle string2int_map)
 {
 	int ret=0;
 	size_t offset=0, len=0;
@@ -375,7 +470,7 @@ int read_composition_table_schema(const char* line, struct Maat_table_schema* p,
 	}
 	if(offset+len<strlen(copy_line))
 	{
-		copy_line[offset+len+1]='\0';
+		copy_line[offset+len]='\0';
 	}
 	composition_info=copy_line+offset;
 
@@ -388,126 +483,55 @@ int read_composition_table_schema(const char* line, struct Maat_table_schema* p,
 	tmp=cJSON_GetObjectItem(json, "source");
 	if(tmp!=NULL && tmp->type==cJSON_String)
 	{
-		strncpy(composition_schema->source_table.real_table_name, tmp->valuestring, sizeof(composition_schema->source_table.real_table_name));
+		ret=map_str2int(table_mgr->map_tablename2id, tmp->valuestring, &(composition_schema->component_table_id[COMPONENT_TABLE_TYPE_SOURCE_IP]));
+		if(ret<0)
+		{
+			MESA_handle_runtime_log(table_mgr->logger, RLOG_LV_FATAL, maat_module,
+							"Child table %s of table %s (id=%d) are not defined.",
+							tmp->valuestring,
+							p->table_name[0],
+							p->table_id);
+			goto error_out;
+		}
 	}
 	tmp=cJSON_GetObjectItem(json, "destination");
 	if(tmp!=NULL && tmp->type==cJSON_String)
 	{
-		strncpy(composition_schema->destination_table.real_table_name, tmp->valuestring, sizeof(composition_schema->destination_table.real_table_name));
+		ret=map_str2int(table_mgr->map_tablename2id, tmp->valuestring, &(composition_schema->component_table_id[COMPONENT_TABLE_TYPE_DESTINATION_IP]));
+		if(ret<0)
+		{
+			MESA_handle_runtime_log(table_mgr->logger, RLOG_LV_FATAL, maat_module,
+							"Child table %s of table %s (id=%d) are not defined.",
+							tmp->valuestring,
+							p->table_name[0],
+							p->table_id);
+			goto error_out;
+		}
+
 	}
 	tmp=cJSON_GetObjectItem(json, "session");
 	if(tmp!=NULL && tmp->type==cJSON_String)
 	{
-		strncpy(composition_schema->session_table.real_table_name, tmp->valuestring, sizeof(composition_schema->session_table.real_table_name));
+		ret=map_str2int(table_mgr->map_tablename2id, tmp->valuestring, &(composition_schema->component_table_id[COMPONENT_TABLE_TYPE_SESSION]));
+		if(ret<0)
+		{
+			MESA_handle_runtime_log(table_mgr->logger, RLOG_LV_FATAL, maat_module,
+							"Child table %s of table %s (id=%d) are not defined.",
+							tmp->valuestring,
+							p->table_name[0],
+							p->table_id);
+			goto error_out;
+		}
 	}
 	cJSON_Delete(json);
-
 	free(copy_line);
 	return 0;
+	
 error_out:
 	free(copy_line);
 	return -1;
 
 }
-static int Maat_table_build_map(struct Maat_table_manager* table_mgr, void* logger)
-{
-	struct Maat_table_schema** p_table_info=table_mgr->p_table_info;
-	size_t n_table=MAX_TABLE_NUM;
-
-	MESA_htable_handle map_tablename2id=map_create();
-	size_t i=0;
-	int j=0, ret=0;
-	for(i=0;i<n_table;i++)
-	{
-		if(p_table_info[i]==NULL)
-		{
-			continue;
-		}
-		
-		switch(p_table_info[i]->table_type)
-		{
-			case TABLE_TYPE_VIRTUAL:
-				ret=map_str2int(map_tablename2id, p_table_info[i]->virtual_table.real_table_name, &(p_table_info[i]->virtual_table.real_table_id));
-				if(ret<0)
-				{
-					MESA_handle_runtime_log(logger, RLOG_LV_FATAL, maat_module,
-									"Undefined real table %s, virtual table %s of table id %d.",
-									p_table_info[i]->virtual_table.real_table_name,
-									p_table_info[i]->table_name[0],
-									p_table_info[i]->table_id);
-					goto failed;
-				}
-				break;
-			case TABLE_TYPE_COMPOSITION:
-				if(strlen(p_table_info[i]->composition.source_table.real_table_name)>0)
-				{
-					ret=map_str2int(map_tablename2id, p_table_info[i]->composition.source_table.real_table_name,
-						&(p_table_info[i]->composition.source_table.real_table_id));
-					if(ret<0)
-					{
-						MESA_handle_runtime_log(logger, RLOG_LV_FATAL, maat_module,
-										"Child table %s of table %s (id=%d) are not defined.",
-										p_table_info[i]->composition.source_table.real_table_name,
-										p_table_info[i]->table_name[0],
-										p_table_info[i]->table_id);
-						goto failed;
-					}
-				}
-				
-				if(strlen(p_table_info[i]->composition.destination_table.real_table_name)>0)
-				{
-					ret=map_str2int(map_tablename2id, p_table_info[i]->composition.destination_table.real_table_name,
-						&(p_table_info[i]->composition.destination_table.real_table_id));
-					if(ret<0)
-					{
-						MESA_handle_runtime_log(logger, RLOG_LV_FATAL, maat_module,
-										"Child table %s of table %s (id=%d) are not defined.",
-										p_table_info[i]->composition.destination_table.real_table_name,
-										p_table_info[i]->table_name[0],
-										p_table_info[i]->table_id);
-						goto failed;
-					}
-				}
-				if(strlen(p_table_info[i]->composition.session_table.real_table_name)>0)
-				{
-					ret=map_str2int(map_tablename2id, p_table_info[i]->composition.session_table.real_table_name,
-						&(p_table_info[i]->composition.session_table.real_table_id));
-					if(ret<0)
-					{
-						MESA_handle_runtime_log(logger, RLOG_LV_FATAL, maat_module,
-										"Child table %s of table %s (id=%d) are not defined.",
-										p_table_info[i]->composition.session_table.real_table_name,
-										p_table_info[i]->table_name[0],
-										p_table_info[i]->table_id);
-						goto failed;
-					}
-				}
-			default:
-				break;
-		}
-
-		
-		for(j=0; j<p_table_info[i]->conj_cnt; j++)
-		{
-			ret=map_register(map_tablename2id, p_table_info[i]->table_name[j], p_table_info[i]->table_id);
-			if(ret<0)
-			{
-				MESA_handle_runtime_log(logger, RLOG_LV_FATAL, maat_module,
-								"Duplicate table %s of table id %d",
-								p_table_info[i]->table_name[j],
-								p_table_info[i]->table_id);
-				continue;
-			}
-		}
-		
-	}
-	table_mgr->map_tablename2id=map_tablename2id;
-	return 0;
-failed:
-	map_destroy(map_tablename2id);
-	return -1;
-}
-
 void Maat_table_manager_destroy(struct Maat_table_manager* table_mgr)
 {
 	size_t i=0;
@@ -532,7 +556,7 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 	char line[MAX_TABLE_LINE_SIZE];
 	int i=0, ret=0;
 	char table_type_str[16]={0},not_care[1024]={0}, tmp_str[32]={0};
-	MESA_htable_handle string2int_map=NULL;;
+	MESA_htable_handle reserved_word_map=NULL;;
 	struct Maat_table_schema*p=NULL;
 	struct Maat_table_schema*conj_table=NULL;
 	fp=fopen(table_info_path,"r");
@@ -546,38 +570,40 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 	table_mgr=ALLOC(struct Maat_table_manager, 1);
 	struct Maat_table_schema** p_table_info=table_mgr->p_table_info;
 	size_t n_table=MAX_TABLE_NUM;
+	table_mgr->logger=logger;
+	table_mgr->map_tablename2id=map_create();
 
-	string2int_map=map_create();
-	map_register(string2int_map,"expr", TABLE_TYPE_EXPR);
-	map_register(string2int_map,"ip", TABLE_TYPE_IP);	
-	map_register(string2int_map,"ip_plus", TABLE_TYPE_IP_PLUS);
-	map_register(string2int_map,"compile", TABLE_TYPE_COMPILE);
-	map_register(string2int_map,"plugin", TABLE_TYPE_PLUGIN);
-	map_register(string2int_map,"ip_plugin", TABLE_TYPE_IP_PLUGIN);
-	map_register(string2int_map,"fqdn_plugin", TABLE_TYPE_FQDN_PLUGIN);
-	map_register(string2int_map,"intval", TABLE_TYPE_INTERVAL);
-	map_register(string2int_map,"interval", TABLE_TYPE_INTERVAL);
-	map_register(string2int_map,"intval_plus", TABLE_TYPE_INTERVAL_PLUS);
-	map_register(string2int_map,"interval_plus", TABLE_TYPE_INTERVAL_PLUS);
-	map_register(string2int_map,"digest", TABLE_TYPE_DIGEST);
-	map_register(string2int_map,"expr_plus", TABLE_TYPE_EXPR_PLUS);
-	map_register(string2int_map,"group", TABLE_TYPE_GROUP);
-	map_register(string2int_map,"group2group", TABLE_TYPE_GROUP2GROUP);
-	map_register(string2int_map,"group2compile", TABLE_TYPE_GROUP2COMPILE);
-	map_register(string2int_map,"similar", TABLE_TYPE_SIMILARITY);
-	map_register(string2int_map,"virtual", TABLE_TYPE_VIRTUAL);
-	map_register(string2int_map,"composition", TABLE_TYPE_COMPOSITION);
-	map_register(string2int_map,"quickoff", 0);
-	map_register(string2int_map,"quickon", 1);
-	map_register(string2int_map,"escape", USER_REGION_ENCODE_ESCAPE);
-//	map_register(string2int_map,"base64",USER_REGION_ENCODE_BASE64); //NOT supported yet
+	reserved_word_map=map_create();
+	map_register(reserved_word_map, "expr", TABLE_TYPE_EXPR);
+	map_register(reserved_word_map, "ip", TABLE_TYPE_IP);	
+	map_register(reserved_word_map, "ip_plus", TABLE_TYPE_IP_PLUS);
+	map_register(reserved_word_map, "compile", TABLE_TYPE_COMPILE);
+	map_register(reserved_word_map, "plugin", TABLE_TYPE_PLUGIN);
+	map_register(reserved_word_map, "ip_plugin", TABLE_TYPE_IP_PLUGIN);
+	map_register(reserved_word_map, "fqdn_plugin", TABLE_TYPE_FQDN_PLUGIN);
+	map_register(reserved_word_map, "intval", TABLE_TYPE_INTERVAL);
+	map_register(reserved_word_map, "interval", TABLE_TYPE_INTERVAL);
+	map_register(reserved_word_map, "intval_plus", TABLE_TYPE_INTERVAL_PLUS);
+	map_register(reserved_word_map, "interval_plus", TABLE_TYPE_INTERVAL_PLUS);
+	map_register(reserved_word_map, "digest", TABLE_TYPE_DIGEST);
+	map_register(reserved_word_map, "expr_plus", TABLE_TYPE_EXPR_PLUS);
+	map_register(reserved_word_map, "group", TABLE_TYPE_GROUP);
+	map_register(reserved_word_map, "group2group", TABLE_TYPE_GROUP2GROUP);
+	map_register(reserved_word_map, "group2compile", TABLE_TYPE_GROUP2COMPILE);
+	map_register(reserved_word_map, "similar", TABLE_TYPE_SIMILARITY);
+	map_register(reserved_word_map, "virtual", TABLE_TYPE_VIRTUAL);
+	map_register(reserved_word_map, "composition", TABLE_TYPE_COMPOSITION);
+	map_register(reserved_word_map, "quickoff", 0);
+	map_register(reserved_word_map, "quickon", 1);
+	map_register(reserved_word_map, "escape", USER_REGION_ENCODE_ESCAPE);
+//	map_register(reserved_word_map,"base64",USER_REGION_ENCODE_BASE64); //NOT supported yet
 
 	const char** charset_name_list=charset_get_all_name();
 	for(i=0;i<MAX_CHARSET_NUM;i++)
 	{
 		if(strlen(charset_name_list[i])>0)
 		{
-			map_register(string2int_map, charset_name_list[i], i);
+			map_register(reserved_word_map, charset_name_list[i], i);
 		}
 		else
 		{
@@ -585,8 +611,8 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 		}
 	}
 
-	map_register(string2int_map,"yes", 1);
-	map_register(string2int_map,"no", 0);
+	map_register(reserved_word_map,"yes", 1);
+	map_register(reserved_word_map,"no", 0);
 	
 
 	i=0;
@@ -610,7 +636,7 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 									"Maat read table info %s line %d error: not enough column.",table_info_path,i);
 			continue;
 		}
-		ret=map_str2int(string2int_map,str_tolower(table_type_str),(int*)&(p->table_type));
+		ret=map_str2int(reserved_word_map,str_tolower(table_type_str),(int*)&(p->table_type));
 		if(ret<0)
 		{
 			MESA_handle_runtime_log(logger, RLOG_LV_FATAL,maat_module,
@@ -621,7 +647,7 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 		{
 			case TABLE_TYPE_EXPR:
 			case TABLE_TYPE_EXPR_PLUS:
-				ret=read_expr_table_info(line, p, string2int_map);
+				ret=read_expr_table_info(line, p, reserved_word_map);
 				if(ret<0)
 				{
 					fprintf(stderr,"Maat read table info %s line %d error:illegal column.\n",table_info_path,i);
@@ -661,7 +687,7 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 				}
 				break;
 			case TABLE_TYPE_COMPOSITION:
-				ret=read_composition_table_schema(line, p, string2int_map);
+				ret=read_composition_table_schema(table_mgr, line, p, reserved_word_map);
 				if(ret<0)
 				{
 					fprintf(stderr,"Maat read table info %s line %d error:illegal composition table schema.\n", table_info_path,i);
@@ -671,7 +697,7 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 				}
 				break;
 			case TABLE_TYPE_VIRTUAL:
-				ret=read_virtual_table_schema(line, p, string2int_map);
+				ret=read_virtual_table_schema(table_mgr, line, p, reserved_word_map);
 				if(ret<0)
 				{
 					fprintf(stderr,"Maat read table info %s line %d error:illegal virtual table schema.\n", table_info_path,i);
@@ -684,7 +710,7 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 				ret=sscanf(not_care,"%[a-z0-9]",tmp_str);
 				if(ret>0)
 				{	
-					ret=map_str2int(string2int_map,str_tolower(tmp_str),(int*)&(p->compile.user_region_encoding));
+					ret=map_str2int(reserved_word_map,str_tolower(tmp_str),(int*)&(p->compile.user_region_encoding));
 				}
 				if(ret!=1)
 				{
@@ -703,6 +729,15 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 
 			goto invalid_table;
 		}
+		ret=map_register(table_mgr->map_tablename2id, p->table_name[0], p->table_id);
+		if(ret<0)
+		{
+			MESA_handle_runtime_log(logger, RLOG_LV_FATAL, maat_module,
+							"Duplicate table %s of table id %d",
+							p->table_name[0],
+							p->table_id);
+			goto invalid_table;
+		}
 		if(p_table_info[p->table_id]!=NULL)//duplicate table_id,means conjunction table;
 		{
 			conj_table=p_table_info[p->table_id];
@@ -722,21 +757,16 @@ struct Maat_table_manager* Maat_table_manager_create(const char* table_info_path
 			//use goto to free the conjunctioned table_info
 			goto invalid_table;
 		}
-
 		p_table_info[p->table_id]=p;
 		table_mgr->table_cnt++;
 		continue;
+		
 invalid_table:
 		table_info_free(p);
 		p=NULL;
 	}
 	fclose(fp);
-	ret=Maat_table_build_map(table_mgr, logger);
-	if(ret<0)
-	{
-		return NULL;
-	}
-	map_destroy(string2int_map);
+	map_destroy(reserved_word_map);
 	return table_mgr;
 }
 size_t Maat_table_manager_get_size(struct Maat_table_manager* table_mgr)
@@ -822,13 +852,13 @@ struct Maat_table_schema * Maat_table_get_by_id_raw(struct Maat_table_manager* t
 	return table_mgr->p_table_info[table_id];
 }
 
-struct Maat_table_schema * Maat_table_get_scan_by_id(struct Maat_table_manager* table_mgr, int table_id, enum MAAT_TABLE_TYPE expect_type, int* virutal_table_id)
+struct Maat_table_schema * Maat_table_get_scan_by_id(struct Maat_table_manager* table_mgr, int table_id, enum MAAT_SCAN_TYPE scan_type, int* virutal_table_id)
 {
-
+	enum MAAT_SCAN_TYPE tab_scan_type;
 	struct Maat_table_schema **p_table_info=table_mgr->p_table_info;
 	size_t n_table=MAX_TABLE_NUM;
 
-	struct Maat_table_schema *p_table=NULL, *p_real_table=NULL;
+	struct Maat_table_schema *p_table=NULL, *p_physical_table=NULL;
 	if((unsigned int) table_id>n_table)
 	{
 		return NULL;
@@ -844,23 +874,20 @@ struct Maat_table_schema * Maat_table_get_scan_by_id(struct Maat_table_manager*
 	}
 	if(p_table->table_type==TABLE_TYPE_VIRTUAL)
 	{
-		p_real_table=p_table_info[p_table->virtual_table.real_table_id];
+		p_physical_table=p_table_info[p_table->virtual_table.physical_table_id[scan_type]];
 		*virutal_table_id=table_id;
 	}
 	else
 	{
-		p_real_table=p_table;
+		p_physical_table=p_table;
 		if(virutal_table_id) *virutal_table_id=0;
 	}
-	if(p_real_table->table_type!=expect_type)
+	tab_scan_type=Maat_table_get_scan_type(p_physical_table->table_type);
+	if(tab_scan_type!=scan_type)
 	{
-		if((expect_type==TABLE_TYPE_EXPR && p_real_table->table_type!=TABLE_TYPE_EXPR_PLUS)||
-			(expect_type==TABLE_TYPE_IP && p_real_table->table_type!=TABLE_TYPE_IP_PLUS))
-		{
-			return NULL;
-		}
+			return NULL;	
 	}
-	return p_real_table;
+	return p_physical_table;
 }
 int Maat_table_get_id_by_name(struct Maat_table_manager* table_mgr, const char* table_name)
 {
@@ -883,7 +910,7 @@ int Maat_table_add_callback_func(struct Maat_table_manager* table_mgr,
 									void* u_para)
 {
 	int idx=0;
-	struct Maat_table_schema *p_table=Maat_table_get_scan_by_id(table_mgr, table_id, TABLE_TYPE_PLUGIN, NULL);
+	struct Maat_table_schema *p_table=Maat_table_get_scan_by_id(table_mgr, table_id, SCAN_TYPE_PLUGIN, NULL);
 	struct plugin_table_schema *plugin_desc=&(p_table->plugin);
 	if(p_table==NULL)
 	{
@@ -913,7 +940,7 @@ struct compile_ex_data_idx* Maat_table_get_compile_rule_ex_desc(struct Maat_tabl
 	{
 		return NULL;
 	}
-	p_table=Maat_table_get_scan_by_id(table_mgr, table_id, TABLE_TYPE_COMPILE, NULL);
+	p_table=Maat_table_get_scan_by_id(table_mgr, table_id, SCAN_TYPE_NONE, NULL);
 	if(!p_table)
 	{
 		return NULL;
@@ -938,7 +965,7 @@ int Maat_table_new_compile_rule_ex_index(struct Maat_table_manager* table_mgr, c
 	{
 		return -1;
 	}
-	p_table=Maat_table_get_scan_by_id(table_mgr, table_id, TABLE_TYPE_COMPILE, NULL);
+	p_table=Maat_table_get_scan_by_id(table_mgr, table_id, SCAN_TYPE_NONE, NULL);
 	if(!p_table)
 	{
 		return -1;
@@ -1175,28 +1202,15 @@ void Maat_table_set_updating_name(struct Maat_table_schema* p_table, const char*
 	assert(i<=p_table->conj_cnt);
 }
 
-int Maat_table_get_child_id(struct Maat_table_schema* p_table, enum MAAT_TABLE_CHILD_TYPE type)
+int Maat_table_get_child_id(struct Maat_table_manager* table_mgr, int parent_table_id, enum MAAT_TABLE_COMPONENT_TYPE type)
 {
 	int ret=-1;
+	struct Maat_table_schema* p_table=Maat_table_get_by_id_raw(table_mgr, parent_table_id);
 	if(p_table->table_type!=TABLE_TYPE_COMPOSITION)
 	{
 		return -1;
 	}
-	switch (type)
-	{
-		case CHILD_TABLE_TYPE_SOURCE_IP:
-			ret=p_table->composition.source_table.real_table_id;
-			break;
-		case CHILD_TABLE_TYPE_DESTINATION_IP:
-			ret=p_table->composition.destination_table.real_table_id;
-			break;
-		case CHILD_TABLE_TYPE_SESSION:
-			ret=p_table->composition.session_table.real_table_id;
-			break;
-		default:
-			assert(0);
-			break;
-	}
+	ret=p_table->composition.component_table_id[type];
 	return ret;
 }
 int Maat_table_xx_plugin_table_get_valid_flag_column(struct Maat_table_schema* p_table)
@@ -1219,3 +1233,4 @@ int Maat_table_xx_plugin_table_get_valid_flag_column(struct Maat_table_schema* p
 	}
 	return valid_flag_column;
 }
+
diff --git a/src/inc_internal/Maat_table.h b/src/inc_internal/Maat_table.h
index e6662a0..c34a1de 100644
--- a/src/inc_internal/Maat_table.h
+++ b/src/inc_internal/Maat_table.h
@@ -17,6 +17,28 @@ enum USER_REGION_ENCODE
 	USER_REGION_ENCODE_ESCAPE,
 	USER_REGION_ENCODE_BASE64
 };
+enum MAAT_SCAN_TYPE
+{
+	SCAN_TYPE_INVALID=-1,
+	SCAN_TYPE_NONE=0,
+	SCAN_TYPE_PLUGIN,
+	SCAN_TYPE_IP_PLUGIN,
+	SCAN_TYPE_FQDN_PLUGIN,
+	SCAN_TYPE_IP,
+	SCAN_TYPE_INTERVAL,
+	SCAN_TYPE_STRING,
+	__SCAN_TYPE_MAX
+};
+
+enum MAAT_TABLE_COMPONENT_TYPE
+{	
+	COMPONENT_TABLE_TYPE_NONE=-1,
+	COMPONENT_TABLE_TYPE_SOURCE_IP=0,
+	COMPONENT_TABLE_TYPE_DESTINATION_IP,
+	COMPONENT_TABLE_TYPE_SESSION,
+	__COMPONENT_TABLE_TYPE_MAX
+};
+
 
 enum MAAT_TABLE_TYPE
 {	
@@ -28,6 +50,8 @@ enum MAAT_TABLE_TYPE
 	TABLE_TYPE_DIGEST,
 	TABLE_TYPE_EXPR_PLUS,
 	TABLE_TYPE_SIMILARITY,
+	TABLE_TYPE_INTERVAL_PLUS,
+	//Above are physical table for scan
 	TABLE_TYPE_VIRTUAL,
 	TABLE_TYPE_COMPOSITION,
 	TABLE_TYPE_GROUP2GROUP,
@@ -36,7 +60,6 @@ enum MAAT_TABLE_TYPE
 	TABLE_TYPE_COMPILE,
 	TABLE_TYPE_PLUGIN,
 	TABLE_TYPE_IP_PLUGIN,
-	TABLE_TYPE_INTERVAL_PLUS,
 	TABLE_TYPE_FQDN_PLUGIN
 };
 
@@ -69,12 +92,11 @@ struct expr_table_schema
 };
 struct virtual_table_schema
 {
-	int real_table_id;
-	char real_table_name[MAX_TABLE_NAME_LEN];
+	int physical_table_id[__SCAN_TYPE_MAX];
 };
 struct composition_table_schema
 {	
-	struct virtual_table_schema source_table, destination_table, session_table;
+	int component_table_id[__COMPONENT_TABLE_TYPE_MAX];
 };
 struct plugin_table_callback_schema
 {
@@ -155,8 +177,9 @@ void Maat_table_manager_destroy(struct Maat_table_manager* table_mgr);
 size_t Maat_table_manager_get_size(struct Maat_table_manager* table_mgr);
 size_t Maat_table_manager_get_count(struct Maat_table_manager* table_mgr);
 
-struct Maat_table_schema * Maat_table_get_scan_by_id(struct Maat_table_manager* table_mgr, int table_id, enum MAAT_TABLE_TYPE expect_type, int* virutal_table_id);
+struct Maat_table_schema * Maat_table_get_scan_by_id(struct Maat_table_manager* table_mgr, int table_id, enum MAAT_SCAN_TYPE scan_type, int* virutal_table_id);
 struct Maat_table_schema * Maat_table_get_by_id_raw(struct Maat_table_manager* table_mgr, int table_id);
+enum MAAT_SCAN_TYPE Maat_table_get_scan_type(enum MAAT_TABLE_TYPE table_type);
 
 int Maat_table_get_id_by_name(struct Maat_table_manager* table_mgr, const char* table_name);
 int Maat_table_add_callback_func(struct Maat_table_manager* table_mgr,
@@ -206,13 +229,7 @@ void Maat_table_manager_all_plugin_cb_finish(struct Maat_table_manager* table_mg
 int Maat_table_manager_is_last_plugin_table_updating(struct Maat_table_manager* table_mgr);
 struct Maat_table_schema* Maat_table_get_desc_by_name(struct Maat_table_manager* table_mgr, const char* table_name);
 void Maat_table_set_updating_name(struct Maat_table_schema* p_table, const char* table_name);
-enum MAAT_TABLE_CHILD_TYPE
-{	
-	CHILD_TABLE_TYPE_NONE=-1,
-	CHILD_TABLE_TYPE_SOURCE_IP=0,
-	CHILD_TABLE_TYPE_DESTINATION_IP,
-	CHILD_TABLE_TYPE_SESSION
-};
-int Maat_table_get_child_id(struct Maat_table_schema* p_table, enum MAAT_TABLE_CHILD_TYPE type);
+
+int Maat_table_get_child_id(struct Maat_table_manager* table_mgr, int parent_table_id, enum MAAT_TABLE_COMPONENT_TYPE type);
 int Maat_table_xx_plugin_table_get_valid_flag_column(struct Maat_table_schema* p_table);
 
diff --git a/test/maat_json.json b/test/maat_json.json
index 11e1520..8f835c3 100644
--- a/test/maat_json.json
+++ b/test/maat_json.json
@@ -60,7 +60,7 @@
           "regions": [
               {
                   "table_name": "GeoLocation",
-                  "table_type": "string",
+                  "table_type": "expr",
                   "table_content": {
                       "keywords": "Greece.Sparta",
                       "expr_type": "none",
@@ -69,6 +69,35 @@
                   }
               }
           ]
+      },
+      {
+          "group_name": "FQDN_OBJ1",
+          "regions": [
+              {
+                  "table_name": "KEYWORDS_TABLE",
+                  "table_type": "expr",
+                  "table_content": {
+                      "keywords": "sports.example.com",
+                      "expr_type": "none",
+                      "match_method": "exact",
+                      "format": "uncase plain"
+                  }
+              }
+          ]
+      },
+      {
+          "group_name": "FQDN_CAT1",
+          "regions": [
+              {
+                  "table_name": "INTERGER_PLUS",
+                  "table_type": "intval_plus",
+                  "table_content": {
+                      "district": "fqdn_cat_id",
+                      "low_boundary": 1724,
+                      "up_boundary": 1724
+                  }
+              }
+          ]
       }
     ],
     "rules": [
@@ -1220,7 +1249,7 @@
 		        "do_blacklist": 0,
 		        "do_log": 0,
 		        "effective_rage": 0,
-		        "user_region": "VirtualWithPhysical",
+		        "user_region": "VirtualWithOnePhysical",
 		        "is_valid": "yes",
 		        "groups": [
 		            {
@@ -1850,7 +1879,31 @@
                     ]
                 }
             ]
-        }
+        },
+		    {
+		        "compile_id": 180,
+		        "service": 0,
+		        "action": 0,
+		        "do_blacklist": 0,
+		        "do_log": 0,
+		        "effective_rage": 0,
+		        "user_region": "Hierarchy_VirtualWithTwoPhysical",
+		        "is_valid": "yes",
+		        "groups": [
+		            {
+		            		"group_name":"FQDN_OBJ1",
+		            		"virtual_table":"VIRTUAL_SSL_SNI",
+		            		"not_flag" : 0,
+		            		"clause_index":0
+		            },
+		            {
+		            		"group_name":"FQDN_CAT1",
+		            		"virtual_table":"VIRTUAL_SSL_SNI",
+		            		"not_flag" : 0,
+		            		"clause_index":0
+		            }        
+		        ]
+		    }
     ],
     "plugin_table": [
         {
diff --git a/test/table_info.conf b/test/table_info.conf
index c92aa17..adfaf31 100644
--- a/test/table_info.conf
+++ b/test/table_info.conf
@@ -56,4 +56,5 @@
 33	GeoLocation	expr	UTF8	UTF8	yes	0
 34	SOURCE_IP_GEO	virtual	GeoLocation	--
 35	INTERGER_PLUS	intval_plus --
-36	TEST_FQDN_PLUGIN_WITH_EXDATA	fqdn_plugin	{"row_id":1,"is_suffix_match":2,"fqdn":3,"valid":5}	--
\ No newline at end of file
+36	TEST_FQDN_PLUGIN_WITH_EXDATA	fqdn_plugin	{"row_id":1,"is_suffix_match":2,"fqdn":3,"valid":5}	--
+37	VIRTUAL_SSL_SNI	virtual	["KEYWORDS_TABLE","INTERGER_PLUS"]	--
\ No newline at end of file
diff --git a/test/test_maatframe.cpp b/test/test_maatframe.cpp
index 9cfdc5b..2e6876e 100644
--- a/test/test_maatframe.cpp
+++ b/test/test_maatframe.cpp
@@ -1835,9 +1835,9 @@ TEST(ScanResult, LongerServiceDefine)
 	free(buff);
 	return;
 }
-TEST(Hierarchy, VirtualWithPhysical)
+TEST(Hierarchy, VirtualOfOnePhysical)
 {
-#define  Hierarchy_VirtualWithPhysical
+#define  Hierarchy_VirtualOfOnePhysical
 	int ret=0, table_id=0;
 	const char* http_content="Batman\\:Take me Home.Superman/:Fine,stay with me.";
 	const char* http_url="https://blog.csdn.net/littlefang/article/details/8213058";
@@ -1876,6 +1876,42 @@ TEST(Hierarchy, VirtualWithPhysical)
 
 	return;
 }
+TEST(Hierarchy, VirtualOfTwoPhysical)
+{
+#define  Hierarchy_VirtualWithTwoPhysical
+	int ret=0, table_id=0;
+	const char* sni="sports.example.com";
+	int cat_id=1724;
+	
+	
+	struct Maat_rule_t result[4];
+	memset(result, 0, sizeof(result));
+	
+	scan_status_t mid=NULL;
+
+	table_id=Maat_table_register(g_feather, "VIRTUAL_SSL_SNI");	
+	ASSERT_GT(table_id, 0);
+	
+	ret=Maat_full_scan_string(g_feather, table_id, CHARSET_UTF8, sni, strlen(sni), 
+						result, NULL, 4, &mid, 0);
+
+	EXPECT_EQ(ret, 1);
+	EXPECT_EQ(result[0].config_id, 180);
+	Maat_clean_status(&mid);
+	
+	memset(result, 0, sizeof(result));
+	ret=Maat_set_scan_status(g_feather, &mid, MAAT_SET_SCAN_DISTRICT, "fqdn_cat_id", strlen("fqdn_cat_id"));
+	ASSERT_EQ(ret, 0);
+	
+	ret=Maat_scan_intval(g_feather, table_id, cat_id, result,4, &mid, 0);
+	EXPECT_EQ(ret, 1);
+	EXPECT_EQ(result[0].config_id, 180);
+	
+	Maat_clean_status(&mid);
+
+	return;
+}
+
 TEST(Hierarchy, VirtualWithVirtual)
 {
 #define  Hierarchy_VirtualWithVirtual
@@ -1916,6 +1952,7 @@ TEST(Hierarchy, VirtualWithVirtual)
 
 	return;
 }
+
 TEST(Hierarchy, OneGroupInTwoVirtual)
 {
 #define Hierarchy_OneGroupInTwoVirtual