Simple function to convert tuple to string CSV

Author: pmenon

src/codegen/buffering_consumer.cpp

@@ -40,6 +40,15 @@ WrappedTuple &WrappedTuple::operator=(const WrappedTuple &o) {
   return *this;
 }
 
+std::string WrappedTuple::ToCSV() const {
+  std::string ret;
+  for (uint32_t i = 0; i < tuple_.size(); i++) {
+    if (i != 0) ret.append(",");
+    ret.append(tuple_[i].ToString());
+  }
+  return ret;
+}
+
 //===----------------------------------------------------------------------===//
 // BufferTuple() Proxy
 //===----------------------------------------------------------------------===//

src/include/codegen/buffering_consumer.h

@@ -42,6 +42,8 @@ class WrappedTuple : public ContainerTuple<std::vector<peloton::type::Value>> {
   // Assignment
   WrappedTuple &operator=(const WrappedTuple &o);
 
+  std::string ToCSV() const;
+
   // The tuple
   std::vector<peloton::type::Value> tuple_;
 };