BUG#31450: Query causes error 1048

- Let Item::save_in_field() call set_field_to_null_with_conversions() 
  for decimal type, like this is done for the other item result types.


mysql-test/r/type_decimal.result:
  BUG#31450: Query causes error 1048: testcase
mysql-test/t/type_decimal.test:
  BUG#31450: Query causes error 1048: testcase

1 files changed, 1 insertions, 1 deletions

diff --git a/sql/item.cc b/sql/item.cc
index 83cbf261b8a..739fe7967e2 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -4548,7 +4548,7 @@ int Item::save_in_field(Field *field, bool no_conversions)
     my_decimal decimal_value;
     my_decimal *value= val_decimal(&decimal_value);
     if (null_value)
-      return set_field_to_null(field);
+      return set_field_to_null_with_conversions(field, no_conversions);
     field->set_notnull();
     error=field->store_decimal(value);
   }