do not need to call show databases in debug/load,instead we call create_embedded_thd

debug/load.cc

@@ -102,32 +102,25 @@ static ResType load_files(std::string db="tdb", std::string table="student"){
         //to be
     }
     metadata_files res_meta = load_meta(db,table);
-
-//    for(unsigned int i=0;i<res_meta.dec_onion_index.size();i++){
-        //choosen onion for each field
-//	res[i].choosenOnions.push_back(res_meta.get_choosen_onions()[i]);
-//    }
     std::shared_ptr<ReturnMeta> rm = getReturnMeta(fms,res);
 
     //why do we need this??
-    std::string backq = "show databases";
-    executeAndGetResultRemote(globalConn,backq);
+    create_embedded_thd(0);
 
-    rawMySQLReturnValue resraw2;
+    rawMySQLReturnValue resraw;
 
     //load fields in the stored file
     vector<vector<string>> res_field = load_table_fields(res_meta);
-    resraw2.rowValues = res_field;
+    resraw.rowValues = res_field;
     auto field_names = flat_vec(res_meta.selected_field_names);
     auto field_types = flat_vec(res_meta.selected_field_types);
     auto field_lengths = flat_vec(res_meta.selected_field_lengths);
     
-    resraw2.fieldNames = field_names;
-//    resraw2.choosen_onions = ;
+    resraw.fieldNames = field_names;
     for(unsigned int i=0;i<field_types.size();++i) {
-	resraw2.fieldTypes.push_back(static_cast<enum_field_types>(field_types[i]));
+	resraw.fieldTypes.push_back(static_cast<enum_field_types>(field_types[i]));
     }
-    ResType rawtorestype = MygetResTypeFromLuaTable(false, &resraw2);
+    ResType rawtorestype = MygetResTypeFromLuaTable(false, &resraw);
     auto finalresults = decryptResults(rawtorestype,*rm);
     return finalresults;
 }
@@ -135,6 +128,7 @@ static ResType load_files(std::string db="tdb", std::string table="student"){
 int
 main(int argc, char* argv[]){
     init();
+    create_embedded_thd(0);
     std::string db="tdb",table="student";
     globalEsp = (char*)malloc(sizeof(char)*5000);
     if(globalEsp==NULL){

debug/load.hh

@@ -109,56 +109,7 @@ void rawMySQLReturnValue::show(){
     cout<<endl;
 }
 
-
-//must be static, or we get "no previous declaration"
-//execute the query and get the rawReturnVale, this struct can be copied.
-static 
-rawMySQLReturnValue executeAndGetResultRemote(Connect * curConn,std::string query){
-    std::unique_ptr<DBResult> dbres;
-    curConn->execute(query, &dbres);
-    rawMySQLReturnValue myRaw;
-    
-    if(dbres==nullptr||dbres->n==NULL){
-        std::cout<<"no results"<<std::endl;
-        return myRaw;
-    }
-
-    int num = mysql_num_rows(dbres->n);
-    
-    int numOfFields = mysql_num_fields(dbres->n);
-
-    MYSQL_FIELD *field;
-    MYSQL_ROW row;
-
-    if(num!=0){
-        while( (row = mysql_fetch_row(dbres->n)) ){
-            //what's the difference between fieldlen
-	    unsigned long * fieldLen = mysql_fetch_lengths(dbres->n);
-            std::vector<std::string> curRow;
-            for(int i=0;i<numOfFields;i++){
-                if (i == 0) {
-                    while( (field = mysql_fetch_field(dbres->n)) ) {
-                        myRaw.fieldNames.push_back(std::string(field->name));
-                        myRaw.fieldTypes.push_back(field->type);
-                        //myRaw.lengths.push_back(field->length);
-                        //myRaw.lengths.push_back(fieldLen[i]);
-                        myRaw.lengths.push_back(field->max_length);
-                        myRaw.maxlengths.push_back(field->max_length);
-                        //cout<<field->length<<"::"<<field->max_length<<endl;
-                    }
-                }
-                if(row[i]==NULL) curRow.push_back("NULL");
-                else curRow.push_back(std::string(row[i],fieldLen[i]));
-            }
-            myRaw.rowValues.push_back(curRow);
-        }
-    }
-    return myRaw;
-}
-
-
 //helper function for transforming the rawMySQLReturnValue
-
 static Item_null *
 make_null(const std::string &name = ""){
     char *const n = current_thd->strdup(name.c_str());