From 305dd8e5fba804d8006d34ca7cb05bec5a3b45e6 Mon Sep 17 00:00:00 2001
From: Sergei Petrunia <psergey@askmonty.org>
Date: Fri, 21 Nov 2014 20:45:18 +0300
Subject: Better comments

---
 sql/sql_select.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'sql')

diff --git a/sql/sql_select.h b/sql/sql_select.h
index 41ee2cb51d2..cf3e1b353ab 100644
--- a/sql/sql_select.h
+++ b/sql/sql_select.h
@@ -982,7 +982,13 @@ public:
   */
   uint     top_join_tab_count;
   uint	   send_group_parts;
-  bool	   group;          /**< If query contains GROUP BY clause */
+  /*
+    True if the query has GROUP BY.
+    (that is, if group_by != NULL. when DISTINCT is converted into GROUP BY, it
+     will set this, too. It is not clear why we need a separate var from 
+     group_list)
+  */
+  bool	   group;
   bool     need_distinct;
 
   /**
-- 
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