1 files changed, 36 insertions, 0 deletions
diff --git a/mysql-test/r/func_concat.result b/mysql-test/r/func_concat.result
index ec53d6d87b0..419413e4156 100644
--- a/mysql-test/r/func_concat.result
+++ b/mysql-test/r/func_concat.result
@@ -32,3 +32,39 @@ select * from t1 where concat(A,C,B,D) = 'AAAA2003-03-011051';
 a	b	c	d
 AAAA	105	2003-03-01	1
 drop table t1;
+select 'a' union select concat('a', -4);
+a
+a
+a-4
+select 'a' union select concat('a', -4.5);
+a
+a
+a-4.5
+select 'a' union select concat('a', -(4 + 1));
+a
+a
+a-5
+select 'a' union select concat('a', 4 - 5);
+a
+a
+a-1
+select 'a' union select concat('a', -'3');
+a
+a
+a-3
+select 'a' union select concat('a', -concat('3',4));
+a
+a
+a-34
+select 'a' union select concat('a', -0);
+a
+a
+a0
+select 'a' union select concat('a', -0.0);
+a
+a
+a-0.0
+select 'a' union select concat('a', -0.0000);
+a
+a
+a-0.0000