From 14403c0fd28721e2d9f6e2570aa758926411fb4e Mon Sep 17 00:00:00 2001
From: Alex Boten <aboten@lightstep.com>
Date: Wed, 2 Feb 2022 15:55:01 -0800
Subject: [PATCH] add sum to OTLP histogram

Follow up to #2429.

Fixes #2430
---
 .../exporter/otlp/proto/grpc/_metric_exporter/__init__.py       | 1 +
 .../tests/metrics/test_otlp_metrics_exporter.py                 | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/_metric_exporter/__init__.py b/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/_metric_exporter/__init__.py
index df48a15a7bd..92aba2958c2 100644
--- a/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/_metric_exporter/__init__.py
+++ b/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/_metric_exporter/__init__.py
@@ -137,6 +137,7 @@ def _translate_data(
                     time_unix_nano=metric.point.time_unix_nano,
                     start_time_unix_nano=metric.point.start_time_unix_nano,
                     count=sum(metric.point.bucket_counts),
+                    sum=metric.point.sum,
                     bucket_counts=metric.point.bucket_counts,
                     explicit_bounds=metric.point.explicit_bounds,
                 )
diff --git a/exporter/opentelemetry-exporter-otlp-proto-grpc/tests/metrics/test_otlp_metrics_exporter.py b/exporter/opentelemetry-exporter-otlp-proto-grpc/tests/metrics/test_otlp_metrics_exporter.py
index 2446138de46..9c00ee43408 100644
--- a/exporter/opentelemetry-exporter-otlp-proto-grpc/tests/metrics/test_otlp_metrics_exporter.py
+++ b/exporter/opentelemetry-exporter-otlp-proto-grpc/tests/metrics/test_otlp_metrics_exporter.py
@@ -162,6 +162,7 @@ def setUp(self):
                     time_unix_nano=1641946016139533244,
                     start_time_unix_nano=1641946016139533244,
                     bucket_counts=[1, 4],
+                    sum=67,
                     explicit_bounds=[10.0, 20.0],
                     aggregation_temporality=AggregationTemporality.DELTA,
                 ),
@@ -588,6 +589,7 @@ def test_translate_histogram(self):
                                                 start_time_unix_nano=1641946016139533244,
                                                 time_unix_nano=1641946016139533244,
                                                 count=5,
+                                                sum=67,
                                                 bucket_counts=[1, 4],
                                                 explicit_bounds=[10.0, 20.0],
                                                 exemplars=[],