MDEV-4667 DATE('string') incompability between mysql and mariadb

Cleanup: remove TIME_FUZZY_DATE.

Introduce TIME_FUZZY_DATES which means "very fuzzy, the resulting
value is only used for comparison. It can be invalid date, fine, as long as it can be
compared".

Updated many tests results (they're better now).

1 files changed, 2 insertions, 2 deletions

diff --git a/sql/field_conv.cc b/sql/field_conv.cc
index a64b77bf500..7ec3fe5ea7b 100644
--- a/sql/field_conv.cc
+++ b/sql/field_conv.cc
@@ -413,7 +413,7 @@ static void do_field_decimal(Copy_field *copy)
 static void do_field_temporal(Copy_field *copy)
 {
   MYSQL_TIME ltime;
-  copy->from_field->get_date(&ltime, TIME_FUZZY_DATE);
+  copy->from_field->get_date(&ltime, 0);
   copy->to_field->store_time_dec(&ltime, copy->from_field->decimals());
 }
 
@@ -884,7 +884,7 @@ int field_conv(Field *to,Field *from)
   if (from->cmp_type() == TIME_RESULT)
   {
     MYSQL_TIME ltime;
-    if (from->get_date(&ltime, TIME_FUZZY_DATE))
+    if (from->get_date(&ltime, 0))
       return to->reset();
     else
       return to->store_time_dec(&ltime, from->decimals());