From 60df8681ce7df8bf07ab17060242da7d2074e2d0 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@yandex-team.ru>
Date: Thu, 31 May 2012 01:13:15 +0000
Subject: [PATCH] dbms: development [#CONV-2944].

---
 dbms/src/Interpreters/Aggregator.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dbms/src/Interpreters/Aggregator.cpp b/dbms/src/Interpreters/Aggregator.cpp
index 86decffd239..cd667a3825c 100644
--- a/dbms/src/Interpreters/Aggregator.cpp
+++ b/dbms/src/Interpreters/Aggregator.cpp
@@ -131,7 +131,11 @@ void Aggregator::initialize(Block & block)
 	if (!sample)
 	{
 		for (size_t i = 0, size = keys.size(); i < size; ++i)
+		{
 			sample.insert(block.getByPosition(keys[i]).cloneEmpty());
+			if (sample.getByPosition(i).column->isConst())
+				sample.getByPosition(i).column = dynamic_cast<IColumnConst &>(*sample.getByPosition(i).column).convertToFullColumn();
+		}
 
 		for (size_t i = 0, size = aggregates.size(); i < size; ++i)
 		{