Merge mysql.com:/usr/home/bar/mysql-4.1.b15098

into  mysql.com:/usr/home/bar/mysql-5.0
Bug#15098

mysql-test/r/cast.result

@@ -370,3 +370,11 @@ DROP TABLE t1;
 select cast(NULL as decimal(6)) as t1;
 t1
 NULL
+CREATE TABLE t1 (f1 double);
+INSERT INTO t1 SET f1 = -1.0e+30 ;
+INSERT INTO t1 SET f1 = +1.0e+30 ;
+SELECT f1 AS double_val, CAST(f1 AS SIGNED INT) AS cast_val FROM t1;
+double_val	cast_val
+-1e+30	-9223372036854775808
+1e+30	9223372036854775807
+DROP TABLE t1;

mysql-test/t/cast.test

@@ -165,6 +165,15 @@ select cast(repeat('1',20) as signed);
 #
 select cast(1.0e+300 as signed int);
 
+#
+# Bugs: #15098: CAST(column double TO signed int), wrong result
+#
+CREATE TABLE t1 (f1 double);
+INSERT INTO t1 SET f1 = -1.0e+30 ;
+INSERT INTO t1 SET f1 = +1.0e+30 ;
+SELECT f1 AS double_val, CAST(f1 AS SIGNED INT) AS cast_val FROM t1;
+DROP TABLE t1;					   
+
 # End of 4.1 tests
 
 

sql/field.cc

@@ -4240,6 +4240,11 @@ longlong Field_double::val_int(void)
   else
 #endif
     doubleget(j,ptr);
+  /* Check whether we fit into longlong range */
+  if (j <= (double) LONGLONG_MIN)
+    return (longlong) LONGLONG_MIN;
+  if (j >= (double) (ulonglong) LONGLONG_MAX)
+    return (longlong) LONGLONG_MAX;
   return (longlong) rint(j);
 }