blob progress

src/sql/query_builder.cpp

@@ -24,7 +24,12 @@ void any_type_to_string_visitor::to_string(std::string &val)
 
 void any_type_to_string_visitor::to_string(utils::blob &val)
 {
-
+  // "This is a binary Data string" as binary data:
+  // MySQL:    X'5468697320697320612062616E617279204461746120737472696E67'
+  // Postgres: E'\\x5468697320697320612062616E617279204461746120737472696E67'
+  // MSSQL:    0x5468697320697320612062616E617279204461746120737472696E67
+  // Sqlite:   X'5468697320697320612062616E617279204461746120737472696E67'
+  result = d.token_at(dialect::token_t::BEGIN_BINARY_DATA) + utils::to_string(val) + d.token_at(dialect::token_t::END_BINARY_DATA);
 }
 
 void any_type_to_string_visitor::to_string(placeholder &/*val*/)
@@ -292,20 +297,17 @@ query_builder &query_builder::values(const std::vector<any_type> &values)
   std::string result{"("};
   if (values.size() < 2) {
     for (auto val: values) {
-//      query_.result_vars.push_back(val);
       std::visit(value_to_string_, val);
       result.append(value_to_string_.result);
     }
   } else {
     auto it = values.begin();
     auto val = *it++;
-//    query_.result_vars.push_back(val);
     std::visit(value_to_string_, val);
     result.append(value_to_string_.result);
     for (; it != values.end(); ++it) {
       result.append(", ");
       val = *it;
-//      query_.result_vars.push_back(val);
       std::visit(value_to_string_, val);
       result.append(value_to_string_.result);
     }

src/utils/string.cpp

@@ -21,6 +21,21 @@ const std::string &to_string(const std::string &str)
   return str;
 }
 
+std::string to_string(const blob &data)
+{
+  static constexpr char HEXITS[] = "0123456789ABCDEF";
+
+  std::string str(2 * data.size(), '\0');
+  auto item = str.begin();
+
+  for(auto c : data) {
+    *item++ = HEXITS[c >> 4];
+    *item++ = HEXITS[c & 0x0F];
+  }
+
+  return str;
+}
+
 size_t split(const std::string &str, char delim, std::vector<std::string> &values)
 {
   std::stringstream ss(str);