Fixed bug 10465.

mysql-test/r/type_newdecimal.result

@@ -876,3 +876,12 @@ SELECT * FROM t1;
 f1	f2
 9999999999999999999999999999999999.00000000000000000000	0.00
 DROP TABLE t1;
+CREATE TABLE t1 (GRADE DECIMAL(4) NOT NULL, PRIMARY KEY (GRADE)) ENGINE=INNODB;
+INSERT INTO t1 (GRADE) VALUES (151),(252),(343);
+SELECT GRADE  FROM t1 WHERE GRADE > 160 AND GRADE < 300;
+GRADE
+252
+SELECT GRADE  FROM t1 WHERE GRADE= 151;
+GRADE
+151
+DROP TABLE t1;

mysql-test/t/type_newdecimal.test

@@ -906,3 +906,13 @@ CREATE TABLE t1 (f1 DECIMAL (64,20), f2 DECIMAL(2,2));
 INSERT INTO t1 VALUES (9999999999999999999999999999999999, 0);
 SELECT * FROM t1;
 DROP TABLE t1;
+
+#
+# Bug #10465
+#
+
+CREATE TABLE t1 (GRADE DECIMAL(4) NOT NULL, PRIMARY KEY (GRADE)) ENGINE=INNODB;
+INSERT INTO t1 (GRADE) VALUES (151),(252),(343);
+SELECT GRADE  FROM t1 WHERE GRADE > 160 AND GRADE < 300;
+SELECT GRADE  FROM t1 WHERE GRADE= 151;
+DROP TABLE t1;

sql/field.cc

@@ -8060,7 +8060,12 @@ void create_field::create_length_to_internal_length(void)
     }
     break;
   case MYSQL_TYPE_NEWDECIMAL:
-    key_length= pack_length= my_decimal_get_binary_size(length, decimals);
+    key_length= pack_length=
+      my_decimal_get_binary_size(my_decimal_length_to_precision(length,
+								decimals,
+								flags &
+								UNSIGNED_FLAG),
+				 decimals);
     break;
   default:
     key_length= pack_length= calc_pack_length(sql_type, length);