diff --git a/drogon_ctl/create_model.cc b/drogon_ctl/create_model.cc
index 7e9d3a7c..6201229a 100644
--- a/drogon_ctl/create_model.cc
+++ b/drogon_ctl/create_model.cc
@@ -137,12 +137,12 @@ void create_model::createModelClassFromPG(const std::string &path, const DbClien
                 }
                 else if (type == "bytea")
                 {
-                    info._colType = "std::string";
+                    info._colType = "std::vector<char>";
                 }
                 else
                 {
                     info._colType = "std::string";
-                    //FIXME add more type such as hstore,blob...
+                    //FIXME add more type such as hstore...
                 }
                 auto defaultVal = row["column_default"].as<std::string>();
 
diff --git a/drogon_ctl/templates/model_cc.csp b/drogon_ctl/templates/model_cc.csp
index 091f2cd0..262cadee 100644
--- a/drogon_ctl/templates/model_cc.csp
+++ b/drogon_ctl/templates/model_cc.csp
@@ -110,7 +110,7 @@ const std::string &{{className}}::getColumnName(size_t index) noexcept(false)
                 $$<<"               str[0]=='\\\\'&&str[1]=='x')\n";
                 $$<<"            {\n";
                 $$<<"                auto binStr=drogon::hexToBinaryString((unsigned char *)str.c_str()+2,str.length()-2);\n";
-                $$<<"                _"<<col._colValName<<"=std::make_shared<std::string>(std::move(binStr));\n";
+                $$<<"                _"<<col._colValName<<"=std::make_shared<std::vector<char>>((char *)binStr.data(),(char *)binStr.data()+binStr.length());\n";
                 $$<<"            }\n";
                 $$<<"        }\n";
                 continue;
@@ -134,7 +134,15 @@ const std::string &{{className}}::getColumnName(size_t index) noexcept(false)
             $$<<"        return *_"<<col._colValName<<";\n";
             $$<<"    return defaultValue;\n";
             $$<<"}\n";
-          
+            if(col._colType=="std::vector<char>")
+            {
+                $$<<"std::string "<<className<<"::getValueOf"<<col._colTypeName<<"AsString(const std::string &defaultValue) const noexcept\n";
+                $$<<"{\n";
+                $$<<"    if(_"<<col._colValName<<")\n";
+                $$<<"        return std::string(_"<<col._colValName<<"->data(),_"<<col._colValName<<"->size());\n";
+                $$<<"    return defaultValue;\n";
+                $$<<"}\n";
+            }
             $$<<"std::shared_ptr<const "<<col._colType<<"> "<<className<<"::get"<<col._colTypeName<<"() const noexcept\n";
             $$<<"{\n";
             $$<<"    return _"<<col._colValName<<";\n";
@@ -163,6 +171,15 @@ const std::string &{{className}}::getColumnName(size_t index) noexcept(false)
                     $$<<"    _dirtyFlag["<<i<<"] = true;\n";
                     $$<<"}\n";
                 }
+
+                if(col._colType=="std::vector<char>")
+                {
+                    $$<<"void "<<className<<"::set"<<col._colTypeName<<"(const std::string &"<<col._colValName<<") noexcept\n";
+                    $$<<"{\n";
+                    $$<<"    _"<<col._colValName<<" = std::make_shared<std::vector<char>>("<<col._colValName<<".c_str(),"<<col._colValName<<".c_str()+"<<col._colValName<<".length());\n";
+                    $$<<"    _dirtyFlag["<<i<<"] = true;\n";
+                    $$<<"}\n";
+                }
             }
             if(col._isPrimaryKey&&@@.get<int>("hasPrimaryKey")==1)
             {
@@ -226,8 +243,6 @@ void {{className}}::outputArgs(drogon::orm::internal::SqlBinder &binder) const
         binder << (int32_t)(getValueOf<%c++$$<<col._colTypeName;%>().microSecondsSinceEpoch()/1000000-946656000)/86400;
 <%c++}else if(col._colDatabaseType.find("timestamp")!=std::string::npos){%>
         binder << get<%c++$$<<col._colTypeName;%>()->toCustomedFormattedStringLocal("%Y-%m-%d %H:%M:%S", true);
-<%c++}else if(col._colDatabaseType=="bytea"){%>
-        binder << std::string("\\x")+drogon::binaryStringToHex((unsigned char *)getValueOf<%c++$$<<col._colTypeName;%>().c_str(),getValueOf<%c++$$<<col._colTypeName;%>().length());
 <%c++}else{%>
         binder << getValueOf<%c++$$<<col._colTypeName;%>();
 <%c++}%>
@@ -272,8 +287,6 @@ void {{className}}::updateArgs(drogon::orm::internal::SqlBinder &binder) const
             binder << (int32_t)(getValueOf<%c++$$<<col._colTypeName;%>().microSecondsSinceEpoch()/1000000-946656000)/86400;
 <%c++}else if(col._colDatabaseType.find("timestamp")!=std::string::npos){%>
             binder << get<%c++$$<<col._colTypeName;%>()->toCustomedFormattedStringLocal("%Y-%m-%d %H:%M:%S", true);
-<%c++}else if(col._colDatabaseType=="bytea"){%>
-            binder << std::string("\\x")+drogon::binaryStringToHex((unsigned char *)getValueOf<%c++$$<<col._colTypeName;%>().c_str(),getValueOf<%c++$$<<col._colTypeName;%>().length());
 <%c++}else{%>
             binder << getValueOf<%c++$$<<col._colTypeName;%>();
 <%c++}%>
diff --git a/drogon_ctl/templates/model_h.csp b/drogon_ctl/templates/model_h.csp
index ee6558ed..bc37a1a1 100644
--- a/drogon_ctl/templates/model_h.csp
+++ b/drogon_ctl/templates/model_h.csp
@@ -84,12 +84,20 @@ auto cols=@@.get<std::vector<ColumnInfo>>("columns");
         if(!col._colType.empty())
         {
             $$<<"    const "<<col._colType<<" &getValueOf"<<col._colTypeName<<"(const "<<col._colType<<" &defaultValue="<<col._colType<<"()) const noexcept;\n";
+            if(col._colType=="std::vector<char>")
+            {
+                $$<<"    std::string getValueOf"<<col._colTypeName<<"AsString(const std::string &defaultValue=\"\") const noexcept;\n";
+            }
             $$<<"    std::shared_ptr<const "<<col._colType<<"> get"<<col._colTypeName<<"() const noexcept;\n";
             if(!col._isAutoVal)
             {
             $$<<"    void set"<<col._colTypeName<<"(const "<<col._colType<<" &"<<col._colValName<<") noexcept;\n";
-            if(col._colType=="std::string")
-                $$<<"    void set"<<col._colTypeName<<"("<<col._colType<<" &&"<<col._colValName<<") noexcept;\n";
+                if(col._colType=="std::string")
+                    $$<<"    void set"<<col._colTypeName<<"("<<col._colType<<" &&"<<col._colValName<<") noexcept;\n";
+                if(col._colType=="std::vector<char>")
+                {
+                    $$<<"    void set"<<col._colTypeName<<"(const std::string &"<<col._colValName<<") noexcept;\n";
+                }
             }
         }
         else
diff --git a/orm_lib/inc/drogon/orm/SqlBinder.h b/orm_lib/inc/drogon/orm/SqlBinder.h
index 00abef66..67cffe93 100644
--- a/orm_lib/inc/drogon/orm/SqlBinder.h
+++ b/orm_lib/inc/drogon/orm/SqlBinder.h
@@ -245,7 +245,7 @@ class SqlBinder
             *std::static_pointer_cast<short>(obj) = ntohs(parameter);
             break;
         case 4:
-             *std::static_pointer_cast<int>(obj) = ntohl(parameter);
+            *std::static_pointer_cast<int>(obj) = ntohl(parameter);
             break;
         case 8:
             *std::static_pointer_cast<long>(obj) = ntohll(parameter);
@@ -265,21 +265,19 @@ class SqlBinder
     //template <>
     self &operator<<(const char str[])
     {
-        _paraNum++;
-        _parameters.push_back((char *)str);
-        _length.push_back(strlen(str));
-        _format.push_back(0);
-        return *this;
+        return operator<<(std::string(str));
     }
     self &operator<<(char str[])
     {
-        return operator<<((const char *)str);
+        return operator<<(std::string(str));
     }
     self &operator<<(const std::string &str)
     {
+        std::shared_ptr<std::string> obj = std::make_shared<std::string>(str);
+        _objs.push_back(obj);
         _paraNum++;
-        _parameters.push_back((char *)str.c_str());
-        _length.push_back(str.length());
+        _parameters.push_back((char *)obj->c_str());
+        _length.push_back(obj->length());
         _format.push_back(0);
         return *this;
     }
@@ -305,6 +303,26 @@ class SqlBinder
     {
         return operator<<(date.toCustomedFormattedStringLocal("%Y-%m-%d %H:%M:%S", true)); //for postgreSQL
     }
+    self &operator<<(const std::vector<char> &v)
+    {
+        std::shared_ptr<std::vector<char>> obj = std::make_shared<std::vector<char>>(v);
+        _objs.push_back(obj);
+        _paraNum++;
+        _parameters.push_back((char *)obj->data());
+        _length.push_back(obj->size());
+        _format.push_back(1);
+        return *this;
+    }
+    self &operator<<(std::vector<char> &&v)
+    {
+        std::shared_ptr<std::vector<char>> obj = std::make_shared<std::vector<char>>(std::move(v));
+        _objs.push_back(obj);
+        _paraNum++;
+        _parameters.push_back((char *)obj->data());
+        _length.push_back(obj->size());
+        _format.push_back(1);
+        return *this;
+    }
     self &operator<<(std::nullptr_t nullp)
     {
         _paraNum++;
@@ -323,6 +341,7 @@ class SqlBinder
         _mode = mode;
         return *this;
     }
+   
     void exec() noexcept(false);
 
   private: