From f7782991452e35cad1e705bcb9260f8778429064 Mon Sep 17 00:00:00 2001
From: Aivaras Gotovskis <aivaras.gotovskis@ongr.io>
Date: Fri, 10 Jul 2015 12:07:27 +0300
Subject: [PATCH] Add sum aggregation doc.
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docs/Aggregation/Sum.md | 28 ++++++++++++++++++++++++++++
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+# Sum Aggregation
+
+> More info about sum aggregation is in the [official elasticsearch docs][1]
+
+A single-value metrics aggregation that sums up numeric values that are extracted from the aggregated documents.
+
+## Simple example
+
+```JSON
+{
+ "aggregations" : {
+ "agg_intraday_return" : { "sum" : { "field" : "change" } }
+ }
+}
+```
+
+And now the query via DSL:
+
+```php
+$sumAggregation = new SumAggregation('intraday_return', 'change');
+
+$search = new Search();
+$search->addAggregation($sumAggregation);
+
+$queryArray = $search->toArray();
+```
+
+[1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-metrics-sum-aggregation.html
--
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