a fix (bug #10539: When inserting out of range value in BIT, different engines...

a fix (bug #10539: When inserting out of range value in BIT, different engines behaves differently).           


sql/field.cc:
  a fix (bug #10539: When inserting out of range value in BIT, different engines behaves differently).           
  we have to set the first byte only if there is(are) uneven bit(s).

mysql-test/r/type_bit.result

@@ -458,3 +458,11 @@ select h from t1;
 h
 a
 drop table t1;
+create table t1 (a bit(8)) engine=heap;
+insert into t1 values ('1111100000');
+Warnings:
+Warning	1264	Out of range value adjusted for column 'a' at row 1
+select a+0 from t1;
+a+0
+255
+drop table t1;

mysql-test/t/type_bit.test

@@ -162,3 +162,12 @@ create table t1 (a int, b time, c tinyint, d bool, e char(10), f bit(1),
 insert into t1 set a=1;
 select h from t1;
 drop table t1;
+
+#
+# Bug #10539
+#
+
+create table t1 (a bit(8)) engine=heap;
+insert into t1 values ('1111100000');
+select a+0 from t1;
+drop table t1;

sql/field.cc

@@ -7821,7 +7821,7 @@ int Field_bit::store(const char *from, uint length, CHARSET_INFO *cs)
 
 int Field_bit::store(double nr)
 {
-  return (Field_bit::store((longlong) nr));
+  return store((longlong) nr);
 }
 
 
@@ -8004,7 +8004,8 @@ int Field_bit_as_char::store(const char *from, uint length, CHARSET_INFO *cs)
       (delta == 0 && bits && (uint) (uchar) *from >= (uint) (1 << bits)))
   {
     memset(ptr, 0xff, field_length);
-    *ptr&= ((1 << bits) - 1); /* set first byte */
+    if (bits)
+      *ptr&= ((1 << bits) - 1); /* set first byte */
     set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
     return 1;
   }