2 files changed, 28 insertions, 0 deletions
diff --git a/mysql-test/r/type_float.result b/mysql-test/r/type_float.result
index 6b124caac14..c10cb7d71f7 100644
--- a/mysql-test/r/type_float.result
+++ b/mysql-test/r/type_float.result
@@ -225,6 +225,21 @@ select * from t1 where reckey=1.09E2;
 reckey	recdesc
 109	Has 109 as key
 drop table t1;
+create table t1 (d double(10,1));
+create table t2 (d double(10,9));
+insert into t1 values ("100000000.0");
+insert into t2 values ("1.23456780");
+create table t3 select * from t2 union select * from t1;
+select * from t3;
+d
+1.234567800
+100000000.000000000
+show create table t3;
+Table	Create Table
+t3	CREATE TABLE `t3` (
+  `d` double(22,9) default NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+drop table t1, t2, t3;
 create table t1 (s1 float(0,2));
 ERROR 42000: For float(M,D), double(M,D) or decimal(M,D), M must be >= D (column 's1').
 create table t1 (s1 float(1,2));
diff --git a/mysql-test/t/type_float.test b/mysql-test/t/type_float.test
index cf2a2676ab0..6a0814ef113 100644
--- a/mysql-test/t/type_float.test
+++ b/mysql-test/t/type_float.test
@@ -146,6 +146,19 @@ select * from t1 where reckey=109;
 select * from t1 where reckey=1.09E2;
 drop table t1;
 
+#
+# Bug #13372 (decimal union)
+#
+create table t1 (d double(10,1));
+create table t2 (d double(10,9));
+insert into t1 values ("100000000.0");
+insert into t2 values ("1.23456780");
+create table t3 select * from t2 union select * from t1;
+select * from t3;
+show create table t3;
+drop table t1, t2, t3;
+
+
 # End of 4.1 tests
 
 #