added connection pool and tests

source/orm/sql/dialect_builder.cpp

@@ -52,6 +52,12 @@ dialect_builder &dialect_builder::with_bool_strings(const std::string &true_stri
   return *this;
 }
 
+dialect_builder& dialect_builder::with_escape_string_func( const dialect::to_escaped_string_func& func ) {
+    dialect_.to_escaped_string_func_ = func;
+
+    return *this;
+}
+
 dialect dialect_builder::build()
 {
   return std::move(dialect_);