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-rw-r--r--sql/item.cc11
1 files changed, 8 insertions, 3 deletions
diff --git a/sql/item.cc b/sql/item.cc
index 553ba1b152c..9ff1f8c0084 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -4156,9 +4156,14 @@ static void convert_zerofill_number_to_string(Item **item, Field_num *field)
String tmp(buff,sizeof(buff), field->charset()), *res;
res= (*item)->val_str(&tmp);
- field->prepend_zeros(res);
- pos= (char *) sql_strmake (res->ptr(), res->length());
- *item= new Item_string(pos, res->length(), field->charset());
+ if ((*item)->is_null())
+ *item= new Item_null();
+ else
+ {
+ field->prepend_zeros(res);
+ pos= (char *) sql_strmake (res->ptr(), res->length());
+ *item= new Item_string(pos, res->length(), field->charset());
+ }
}