correct off-by-one error in CONCAT

CONCAT_WS didn't have it

correct off-by-one error in CONCAT
CONCAT_WS didn't have it
69bd7317 · Sergei Golubchik · e8e67bd4 · 69bd7317
Commit 69bd7317 authored Apr 28, 2020 by Sergei Golubchik
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sql/item_strfunc.cc sql/item_strfunc.cc +1 -1

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--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -539,7 +539,7 @@ String *Item_func_concat::val_str(String *str)
 	use_as_buff=str;			// Put next arg here
      }
      else if (tmp_value.is_alloced() && res2->ptr() >= tmp_value.ptr() &&
-	       res2->ptr() <= tmp_value.ptr() + tmp_value.alloced_length())
+	       res2->ptr() < tmp_value.ptr() + tmp_value.alloced_length())
      {
 	/*
 	  This happens really seldom: