Bug#29729: Wrong conversion error led to an empty result set.

The Field_newdate::store when storing a DATETIME value was returning the
'value was cut' error even if the thd->count_cuted_fields flag is set to
CHECK_FIELD_IGNORE. This made range optimizr think that there is no
appropriate data in the table and thus to return an empty set.

Now the Field_newdate::store function returns conversion error only if the
thd->count_cuted_fields flag isn't set to CHECK_FIELD_IGNORE.

mysql-test/r/type_time.result

@@ -109,3 +109,16 @@ select 1 from t1 where cast('100:00:00' as time) between f1 and f2;
 1
 1
 drop table t1;
+CREATE TABLE  t1 (
+f2 date NOT NULL,
+f3 int(11) unsigned NOT NULL default '0',
+PRIMARY KEY  (f3, f2)
+);
+insert into t1 values('2007-07-01', 1);
+insert into t1 values('2007-07-01', 2);
+insert into t1 values('2007-07-02', 1);
+insert into t1 values('2007-07-02', 2);
+SELECT sum(f3) FROM t1 where f2='2007-07-01 00:00:00' group by f2;
+sum(f3)
+3
+drop table t1;

mysql-test/t/type_time.test

@@ -58,3 +58,18 @@ create table t1(f1 time, f2 time);
 insert into t1 values('20:00:00','150:00:00');
 select 1 from t1 where cast('100:00:00' as time) between f1 and f2;
 drop table t1;
+
+#
+# Bug#29729: Wrong conversion error led to an empty result set.
+#
+CREATE TABLE  t1 (
+  f2 date NOT NULL,
+  f3 int(11) unsigned NOT NULL default '0',
+  PRIMARY KEY  (f3, f2)
+);
+insert into t1 values('2007-07-01', 1);
+insert into t1 values('2007-07-01', 2);
+insert into t1 values('2007-07-02', 1);
+insert into t1 values('2007-07-02', 2);
+SELECT sum(f3) FROM t1 where f2='2007-07-01 00:00:00' group by f2;
+drop table t1;

sql/field.cc

@@ -5271,7 +5271,8 @@ int Field_newdate::store(const char *from,uint len,CHARSET_INFO *cs)
   else
   {
     tmp= l_time.day + l_time.month*32 + l_time.year*16*32;
-    if (!error && (ret != MYSQL_TIMESTAMP_DATE))
+    if (!error && (ret != MYSQL_TIMESTAMP_DATE) &&
+        thd->count_cuted_fields != CHECK_FIELD_IGNORE)
       error= 3;                                 // Datetime was cut (note)
   }